From cd4014d4e0dd33390fdefb94625b1def8f50dadc Mon Sep 17 00:00:00 2001
From: Jim Cottrell <jim@lumeadigital.com>
Date: Tue, 15 Oct 2024 14:56:45 -0600
Subject: [PATCH] Fix `coordinateConverter` typos and add to types (#36)

---
 README.md               | 2 +-
 dist/geojson2svg.js     | 2 +-
 dist/geojson2svg.js.map | 2 +-
 dist/geojson2svg.min.js | 2 +-
 src/index.d.ts          | 3 +++
 src/index.js            | 2 +-
 6 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index f600842..947fcf5 100644
--- a/README.md
+++ b/README.md
@@ -143,7 +143,7 @@ Here are all options available for initializing the instance.
 * **mapExtentFromGeojson:** boolean, if true `mapExtent` is calculated from GeoJSON data that is passed in `.convert` function.
 
 * **fitTo:** 'width' | 'height' Fit output SVG map to width or height. If nothing is provided, the program tries to fit the data within width or height so that full mapExtent is visible in viewport.
-* **coordinateCoverter:** 'function' to convert input GeoJSON coordinates while converting to SVG. This function should take coordinates of a point `[x,y]` and returns transformed point `[x, y]`.
+* **coordinateConverter:** 'function' to convert input GeoJSON coordinates while converting to SVG. This function should take coordinates of a point `[x,y]` and returns transformed point `[x, y]`.
 * **pointAsCircle:** true | false, default is false. For point GeoJSON return circle element for option:
     ``` { "pointAsCircel": true } ```
     output SVG string would be:
diff --git a/dist/geojson2svg.js b/dist/geojson2svg.js
index e00464f..b6573a0 100644
--- a/dist/geojson2svg.js
+++ b/dist/geojson2svg.js
@@ -338,7 +338,7 @@ var GeoJSON2SVG = function(options = {}) {
   this.options = options;
   this.viewportSize = options.viewportSize ||
     {width: 256, height: 256};
-  if (options.coordinateCoverter
+  if (options.coordinateConverter
     && typeof options.coordinateConverter != 'function')
   {
     throw new Error('"coordinateConverter" option should be function');
diff --git a/dist/geojson2svg.js.map b/dist/geojson2svg.js.map
index a53819a..183cab2 100644
--- a/dist/geojson2svg.js.map
+++ b/dist/geojson2svg.js.map
@@ -20,6 +20,6 @@
     "module.exports = function(gj) {\n  var coords, bbox;\n  if (!gj.hasOwnProperty('type')) return;\n  coords = getCoordinatesDump(gj);\n  bbox = [ Number.POSITIVE_INFINITY,Number.POSITIVE_INFINITY,\n      Number.NEGATIVE_INFINITY, Number.NEGATIVE_INFINITY,];\n  return coords.reduce(function(prev,coord) {\n    return [\n      Math.min(coord[0], prev[0]),\n      Math.min(coord[1], prev[1]),\n      Math.max(coord[0], prev[2]),\n      Math.max(coord[1], prev[3])\n    ];\n  }, bbox);\n};\n\nfunction getCoordinatesDump(gj) {\n  var coords;\n  if (gj.type == 'Point') {\n    coords = [gj.coordinates];\n  } else if (gj.type == 'LineString' || gj.type == 'MultiPoint') {\n    coords = gj.coordinates;\n  } else if (gj.type == 'Polygon' || gj.type == 'MultiLineString') {\n    coords = gj.coordinates.reduce(function(dump,part) {\n      return dump.concat(part);\n    }, []);\n  } else if (gj.type == 'MultiPolygon') {\n    coords = gj.coordinates.reduce(function(dump,poly) {\n      return dump.concat(poly.reduce(function(points,part) {\n        return points.concat(part);\n      },[]));\n    },[]);\n  } else if (gj.type == 'Feature') {\n    coords =  getCoordinatesDump(gj.geometry);\n  } else if (gj.type == 'GeometryCollection') {\n    coords = gj.geometries.reduce(function(dump,g) {\n      return dump.concat(getCoordinatesDump(g));\n    },[]);\n  } else if (gj.type == 'FeatureCollection') {\n    coords = gj.features.reduce(function(dump,f) {\n      return dump.concat(getCoordinatesDump(f));\n    },[]);\n  }\n  return coords;\n}\n",
     "//index.js \n(function() { \n\tvar singles = ['Point', 'LineString', 'Polygon'];\n\tvar multies = ['MultiPoint', 'MultiLineString', 'MultiPolygon'];\n\tfunction explode(g) {\n\t  if( multies.indexOf(g.type) > -1) {\n\t    return g.coordinates.map(function(part) {\n\t      var single = {};\n\t      single.type = g.type.replace('Multi','');\n\t      single.coordinates = part;\n        if(g.crs) single.crs = g.crs;\n\t      return single;\n\t    });  \n\t  } else {\n\t    return false;\n\t  }\n\t}\n\tfunction implode(gs) {\n\t  var sameType = gs.every(function(g) { \n\t    return singles.indexOf(g.type) > -1;\n\t  })\n    var crs = gs[0].crs || 0;\n    var sameCrs = gs.every(function(g) {\n      var gcrs = g.crs || 0;\n      return gcrs == crs;\n    });\n\t  if(sameType && sameCrs) {\n\t    var multi = {};\n\t    multi.type = 'Multi' + gs[0].type;\n\t    multi.coordinates = [];\n      if(crs != 0) multi.crs = crs;\n\t    gs.forEach(function(g) {\n\t      multi.coordinates.push(g.coordinates);\n\t    });\n\t    return multi;\n\t  } else {\n\t    return false;\n\t  }\n\t};\n\tvar multigeojson = {\n\t  explode: explode,\n\t  implode: implode\n\t};\n\tif(typeof module !== 'undefined' && module.exports) {\n\t  module.exports = multigeojson;\n\t} else if(window) {\n\t  window.multigeojson = multigeojson;\n\t}\n})();\n",
     "//converter.js\nvar multi = require('multigeojson');\n\nfunction getCoordString(coords,res,origin, precision, opt) {\n  //origin - svg image origin\n  var convertedCoords = coords.map(function(coord) {\n    if (opt.coordinateConverter) {\n      coord = opt.coordinateConverter(coord);\n    }\n    return [(coord[0] - origin.x)/res, (origin.y - coord[1])/res];\n  });\n  var coordStr = convertedCoords.map(function (coord) {\n    if (precision) {\n      return coord[0].toFixed(precision) + ',' + coord[1].toFixed(precision);\n    } else {\n      return coord[0] + ',' + coord[1];\n    }\n  });\n  return coordStr.join(' ');\n}\nfunction addAttributes(ele,attributes) {\n  var part = ele.split('/>')[0];\n  for(var key in attributes) {\n    if(attributes[key]) {\n      part += ' ' + key + '=\"' + attributes[key] + '\"';\n    }\n  }\n  return part + ' />';\n}\n\nfunction point(geom,res,origin,opt) {\n  var r = opt && opt.r ? opt.r : 1;\n  var pointAsCircle = opt && opt.hasOwnProperty('pointAsCircle')\n    ? opt.pointAsCircle : false;\n  var coords = getCoordString([geom.coordinates],res,origin,opt.precision, opt);\n  if (pointAsCircle) {\n    return [coords];\n  } else {\n    return [\n      'M' + coords\n      + ' m'+ -r+ ',0'+ ' a'+r+','+ r + ' 0 1,1 '+ 2*r + ','+0\n      + ' a'+r+','+ r + ' 0 1,1 '+ -2*r + ','+0\n    ];\n  }\n}\nfunction multiPoint(geom,res,origin,opt) {\n  var explode = opt && opt.hasOwnProperty('explode') ? opt.explode : false;\n  var paths = multi.explode(geom).map(function(single) {\n    return point(single,res,origin,opt)[0];\n  });\n  if(!explode) return [paths.join(' ')];\n  return paths;\n\n}\nfunction lineString(geom,res,origin,opt) {\n  var coords = getCoordString(geom.coordinates,res,origin,opt.precision, opt);\n  var path = 'M'+ coords;\n  return [path];\n}\nfunction multiLineString(geom,res,origin,opt) {\n  var explode = opt && opt.hasOwnProperty('explode') ? opt.explode : false;\n  var paths = multi.explode(geom).map(function(single) {\n    return lineString(single,res,origin,opt)[0];\n  });\n  if(!explode) return [paths.join(' ')];\n  return paths;\n}\nfunction polygon(geom,res,origin,opt) {\n  var mainStr,holes,holeStr;\n  mainStr = getCoordString(geom.coordinates[0],res,origin,opt.precision, opt);\n  if (geom.coordinates.length > 1) {\n    holes = geom.coordinates.slice(1,geom.coordinates.length);\n  }\n  var path = 'M'+ mainStr;\n  if(holes) {\n    for(var i=0;i<holes.length; i++) {\n      path += ' M' +  getCoordString(holes[i],res,origin,opt.precision, opt);\n    }\n  }\n  path += 'Z';\n  return [path];\n}\nfunction multiPolygon(geom,res,origin,opt) {\n  var explode = opt.hasOwnProperty('explode') ? opt.explode : false;\n  var paths = multi.explode(geom).map(function(single) {\n    return polygon(single,res,origin,opt)[0];\n  });\n  if(!explode) return [paths.join(' ').replace(/Z/g,'') + 'Z'];\n  return paths;\n}\nmodule.exports = {\n  Point: point,\n  MultiPoint: multiPoint,\n  LineString: lineString,\n  MultiLineString: multiLineString,\n  Polygon: polygon,\n  MultiPolygon: multiPolygon\n};\n",
-    "var bbox = require('geojson-bbox');\nvar extend = require('extend');\nvar converter = require('./converter.js');\n\nvar GeoJSON2SVG = function(options = {}) {\n  if (!options.mapExtent) {\n    // throw new\n    //   Error('One of the parameter is must: mapExtent or mapExtentFromGeojson');\n    this.mapExtentFromGeojson = true;\n  } else {\n    this.mapExtentFromGeojson = options.mapExtentFromGeojson;\n  }\n  if (options.fitTo && !/^(width|height)$/i.test(options.fitTo)) {\n    throw new Error('\"fitTo\" option should be \"width\" or \"height\" ');\n  }\n  this.options = options;\n  this.viewportSize = options.viewportSize ||\n    {width: 256, height: 256};\n  if (options.coordinateCoverter\n    && typeof options.coordinateConverter != 'function')\n  {\n    throw new Error('\"coordinateConverter\" option should be function');\n  }\n  this.coordinateConverter = options.coordinateConverter;\n  if (options.mapExtent && this.coordinateConverter) {\n    var rightTop = this.coordinateConverter(\n      [options.mapExtent.right, options.mapExtent.top]);\n    var leftBottom = this.coordinateConverter(\n      [options.mapExtent.left, options.mapExtent.bottom]);\n    this.mapExtent = {\n      left: leftBottom[0], bottom: leftBottom[1],\n      right: rightTop[0], top: rightTop[1]\n    };\n  } else {\n    // yes, it may be undefined in case of mapExtentFromGeojson is true\n    this.mapExtent = options.mapExtent;\n  }\n  if (this.mapExtent) {\n    this.res = this.calResolution(this.mapExtent,this.viewportSize,\n      this.options.fitTo);\n  }\n};\nfunction convertExtent (extent, converter) {\n  var leftBottom = converter([extent[0], extent[1]]);\n  var rightTop = converter([extent[2], extent[3]]);\n  return [...leftBottom, ...rightTop];\n}\nGeoJSON2SVG.prototype.calResolution = function(extent,size,fitTo) {\n  var xres = (extent.right - extent.left)/size.width;\n  var yres = (extent.top - extent.bottom)/size.height;\n  if (fitTo) {\n    if (fitTo.toLowerCase() === 'width') {\n      return xres;\n    } else if (fitTo.toLowerCase() === 'height') {\n      return yres;\n    } else {\n      throw new Error('\"fitTo\" option should be \"width\" or \"height\" ');\n    }\n  } else {\n    return Math.max(xres,yres);\n  }\n};\nGeoJSON2SVG.prototype.convert = function(geojson,options) {\n  var resetExtent = false;\n  if (!this.res && this.mapExtentFromGeojson) {\n    var resetExtent = true;\n    var extent = bbox(geojson); // output extent is an array\n    if (this.coordinateConverter) {\n      // var rightTop = this.coordinateConverter(extent[2] , extent[3]);\n      // var leftBottom = this.coordinateConverter(extent[0], extent[1]);\n      // extent = [leftBottom[0], leftBottom[1],\n      //   rightTop[0], rightTop[1]];\n      extent = convertExtent(extent, this.coordinateConverter);\n    }\n    this.mapExtent = {\n      left: extent[0], bottom: extent[1],\n      right: extent[2], top: extent[3]\n    };\n    this.res = this.calResolution(\n      this.mapExtent, this.viewportSize, this.options.fitTo);\n  }\n  var opt = extend(true, {}, this.options, options || {});\n  var multiGeometries = ['MultiPoint','MultiLineString','MultiPolygon'];\n  var geometries = ['Point', 'LineString', 'Polygon'];\n  var svgElements = [];\n  if (geojson.type == 'FeatureCollection') {\n    for(var i=0; i< geojson.features.length; i++) {\n      svgElements = svgElements.concat(\n        this.convertFeature(geojson.features[i],opt));\n    }\n  } else if (geojson.type == 'Feature') {\n    svgElements = this.convertFeature(geojson,opt);\n  } else if (geojson.type == 'GeometryCollection') {\n    for(var i=0; i< geojson.geometries.length; i++) {\n      svgElements = svgElements.concat(\n        this.convertGeometry(geojson.geometries[i],opt));\n    }\n  } else if (converter[geojson.type]) {\n    svgElements = this.convertGeometry(geojson,opt);\n  } else {\n    throw new Error('Geojson type not supported.');\n  }\n  if (resetExtent) {\n    this.res = null;\n    this.mapExtent = null;\n  }\n  if(opt.callback) opt.callback.call(this,svgElements);\n  return svgElements;\n};\nGeoJSON2SVG.prototype.convertFeature = function(feature,options) {\n  if(!feature && !feature.geometry) return;\n  var opt = extend(true, {}, this.options, options || {});\n  if (opt.attributes && opt.attributes instanceof Array) {\n    var arr = opt.attributes\n    opt.attributes = arr.reduce(function(sum, property) {\n      if (typeof(property) === 'string') {\n        var val, key = property.split('.').pop()\n        try {\n          val = valueAt(feature, property)\n        } catch(e) {\n          val = false\n        }\n        if (val) sum[key] = val\n      } else if (typeof(property) === 'object' && property.type\n        && property.property)\n      {\n        if (property.type === 'dynamic') {\n          var val, key = property.key ? property.key\n            : property.property.split('.').pop()\n          try {\n            val = valueAt(feature, property.property)\n          } catch(e) {\n            val = false\n          }\n          if (val) sum[key] = val\n        } else if (property.type === 'static'  && property.value) {\n          sum[property.property] = property.value\n        }\n      }\n      return sum\n    }, {})\n  } else {\n    opt.attributes = opt.attributes || {};\n  }\n  var id = opt.attributes.id || feature.id ||\n    (feature.properties && feature.properties.id\n    ? feature.properties.id : null);\n  if (id) opt.attributes.id = id;\n  return this.convertGeometry(feature.geometry,opt);\n};\nGeoJSON2SVG.prototype.convertGeometry = function(geom,options) {\n  if(converter[geom.type]) {\n    var opt = extend(true, {}, this.options, options || {});\n    var output = opt.output || 'svg';\n    var paths = converter[geom.type].call(this,geom,\n      this.res,\n      {x:this.mapExtent.left,y:this.mapExtent.top},\n      opt\n    );\n    var svgJsons,svgEles;\n    if (output.toLowerCase() == 'svg') {\n      svgJsons = paths.map(function(path) {\n        return pathToSvgJson(path,geom.type,opt.attributes,opt);\n      });\n      svgEles = svgJsons.map(function(json) {\n        return jsonToSvgElement(json,geom.type,opt);\n      });\n      return svgEles;\n    } else {\n      return paths;\n    }\n  } else {\n    throw new Error('Geojson type not supported.');\n  }\n};\n\nfunction pathToSvgJson(path,type,attributes,opt) {\n  var svg = {};\n  var pointAsCircle = opt && opt.hasOwnProperty('pointAsCircle')\n    ? opt.pointAsCircle : false;\n  if((type == 'Point' || type == 'MultiPoint') && pointAsCircle) {\n    svg['cx'] = path.split(',')[0];\n    svg['cy'] = path.split(',')[1];\n    svg['r'] = opt && opt.r ? opt.r : '1';\n  } else {\n    svg = {d: path};\n    if(type == 'Polygon' || type == 'MultiPolygon') {\n      svg['fill-rule'] == 'evenodd';\n    }\n  }\n  for (var key in attributes) {\n    svg[key]= attributes[key];\n  }\n  return svg;\n};\n\nfunction jsonToSvgElement(json,type,opt) {\n  var pointAsCircle = opt && opt.hasOwnProperty('pointAsCircle')\n    ? opt.pointAsCircle : false;\n  var ele ='<path';\n  if((type == 'Point' || type == 'MultiPoint') && pointAsCircle) {\n    ele = '<circle';\n  }\n  for(var key in json) {\n    ele += ' ' + key +'=\"' + json[key] + '\"';\n  }\n  ele += '/>';\n  return ele;\n}\n\nfunction valueAt(obj,path) {\n  //taken from http://stackoverflow.com/a/6394168/713573\n  function index(prev,cur, i, arr) {\n    if (prev.hasOwnProperty(cur)) {\n      return prev[cur];\n    } else {\n      throw new Error(arr.slice(0,i+1).join('.') + ' is not a valid property path');\n    }\n  }\n  return path.split('.').reduce(index, obj);\n}\nmodule.exports = {GeoJSON2SVG};\n"
+    "var bbox = require('geojson-bbox');\nvar extend = require('extend');\nvar converter = require('./converter.js');\n\nvar GeoJSON2SVG = function(options = {}) {\n  if (!options.mapExtent) {\n    // throw new\n    //   Error('One of the parameter is must: mapExtent or mapExtentFromGeojson');\n    this.mapExtentFromGeojson = true;\n  } else {\n    this.mapExtentFromGeojson = options.mapExtentFromGeojson;\n  }\n  if (options.fitTo && !/^(width|height)$/i.test(options.fitTo)) {\n    throw new Error('\"fitTo\" option should be \"width\" or \"height\" ');\n  }\n  this.options = options;\n  this.viewportSize = options.viewportSize ||\n    {width: 256, height: 256};\n  if (options.coordinateConverter\n    && typeof options.coordinateConverter != 'function')\n  {\n    throw new Error('\"coordinateConverter\" option should be function');\n  }\n  this.coordinateConverter = options.coordinateConverter;\n  if (options.mapExtent && this.coordinateConverter) {\n    var rightTop = this.coordinateConverter(\n      [options.mapExtent.right, options.mapExtent.top]);\n    var leftBottom = this.coordinateConverter(\n      [options.mapExtent.left, options.mapExtent.bottom]);\n    this.mapExtent = {\n      left: leftBottom[0], bottom: leftBottom[1],\n      right: rightTop[0], top: rightTop[1]\n    };\n  } else {\n    // yes, it may be undefined in case of mapExtentFromGeojson is true\n    this.mapExtent = options.mapExtent;\n  }\n  if (this.mapExtent) {\n    this.res = this.calResolution(this.mapExtent,this.viewportSize,\n      this.options.fitTo);\n  }\n};\nfunction convertExtent (extent, converter) {\n  var leftBottom = converter([extent[0], extent[1]]);\n  var rightTop = converter([extent[2], extent[3]]);\n  return [...leftBottom, ...rightTop];\n}\nGeoJSON2SVG.prototype.calResolution = function(extent,size,fitTo) {\n  var xres = (extent.right - extent.left)/size.width;\n  var yres = (extent.top - extent.bottom)/size.height;\n  if (fitTo) {\n    if (fitTo.toLowerCase() === 'width') {\n      return xres;\n    } else if (fitTo.toLowerCase() === 'height') {\n      return yres;\n    } else {\n      throw new Error('\"fitTo\" option should be \"width\" or \"height\" ');\n    }\n  } else {\n    return Math.max(xres,yres);\n  }\n};\nGeoJSON2SVG.prototype.convert = function(geojson,options) {\n  var resetExtent = false;\n  if (!this.res && this.mapExtentFromGeojson) {\n    var resetExtent = true;\n    var extent = bbox(geojson); // output extent is an array\n    if (this.coordinateConverter) {\n      // var rightTop = this.coordinateConverter(extent[2] , extent[3]);\n      // var leftBottom = this.coordinateConverter(extent[0], extent[1]);\n      // extent = [leftBottom[0], leftBottom[1],\n      //   rightTop[0], rightTop[1]];\n      extent = convertExtent(extent, this.coordinateConverter);\n    }\n    this.mapExtent = {\n      left: extent[0], bottom: extent[1],\n      right: extent[2], top: extent[3]\n    };\n    this.res = this.calResolution(\n      this.mapExtent, this.viewportSize, this.options.fitTo);\n  }\n  var opt = extend(true, {}, this.options, options || {});\n  var multiGeometries = ['MultiPoint','MultiLineString','MultiPolygon'];\n  var geometries = ['Point', 'LineString', 'Polygon'];\n  var svgElements = [];\n  if (geojson.type == 'FeatureCollection') {\n    for(var i=0; i< geojson.features.length; i++) {\n      svgElements = svgElements.concat(\n        this.convertFeature(geojson.features[i],opt));\n    }\n  } else if (geojson.type == 'Feature') {\n    svgElements = this.convertFeature(geojson,opt);\n  } else if (geojson.type == 'GeometryCollection') {\n    for(var i=0; i< geojson.geometries.length; i++) {\n      svgElements = svgElements.concat(\n        this.convertGeometry(geojson.geometries[i],opt));\n    }\n  } else if (converter[geojson.type]) {\n    svgElements = this.convertGeometry(geojson,opt);\n  } else {\n    throw new Error('Geojson type not supported.');\n  }\n  if (resetExtent) {\n    this.res = null;\n    this.mapExtent = null;\n  }\n  if(opt.callback) opt.callback.call(this,svgElements);\n  return svgElements;\n};\nGeoJSON2SVG.prototype.convertFeature = function(feature,options) {\n  if(!feature && !feature.geometry) return;\n  var opt = extend(true, {}, this.options, options || {});\n  if (opt.attributes && opt.attributes instanceof Array) {\n    var arr = opt.attributes\n    opt.attributes = arr.reduce(function(sum, property) {\n      if (typeof(property) === 'string') {\n        var val, key = property.split('.').pop()\n        try {\n          val = valueAt(feature, property)\n        } catch(e) {\n          val = false\n        }\n        if (val) sum[key] = val\n      } else if (typeof(property) === 'object' && property.type\n        && property.property)\n      {\n        if (property.type === 'dynamic') {\n          var val, key = property.key ? property.key\n            : property.property.split('.').pop()\n          try {\n            val = valueAt(feature, property.property)\n          } catch(e) {\n            val = false\n          }\n          if (val) sum[key] = val\n        } else if (property.type === 'static'  && property.value) {\n          sum[property.property] = property.value\n        }\n      }\n      return sum\n    }, {})\n  } else {\n    opt.attributes = opt.attributes || {};\n  }\n  var id = opt.attributes.id || feature.id ||\n    (feature.properties && feature.properties.id\n    ? feature.properties.id : null);\n  if (id) opt.attributes.id = id;\n  return this.convertGeometry(feature.geometry,opt);\n};\nGeoJSON2SVG.prototype.convertGeometry = function(geom,options) {\n  if(converter[geom.type]) {\n    var opt = extend(true, {}, this.options, options || {});\n    var output = opt.output || 'svg';\n    var paths = converter[geom.type].call(this,geom,\n      this.res,\n      {x:this.mapExtent.left,y:this.mapExtent.top},\n      opt\n    );\n    var svgJsons,svgEles;\n    if (output.toLowerCase() == 'svg') {\n      svgJsons = paths.map(function(path) {\n        return pathToSvgJson(path,geom.type,opt.attributes,opt);\n      });\n      svgEles = svgJsons.map(function(json) {\n        return jsonToSvgElement(json,geom.type,opt);\n      });\n      return svgEles;\n    } else {\n      return paths;\n    }\n  } else {\n    throw new Error('Geojson type not supported.');\n  }\n};\n\nfunction pathToSvgJson(path,type,attributes,opt) {\n  var svg = {};\n  var pointAsCircle = opt && opt.hasOwnProperty('pointAsCircle')\n    ? opt.pointAsCircle : false;\n  if((type == 'Point' || type == 'MultiPoint') && pointAsCircle) {\n    svg['cx'] = path.split(',')[0];\n    svg['cy'] = path.split(',')[1];\n    svg['r'] = opt && opt.r ? opt.r : '1';\n  } else {\n    svg = {d: path};\n    if(type == 'Polygon' || type == 'MultiPolygon') {\n      svg['fill-rule'] == 'evenodd';\n    }\n  }\n  for (var key in attributes) {\n    svg[key]= attributes[key];\n  }\n  return svg;\n};\n\nfunction jsonToSvgElement(json,type,opt) {\n  var pointAsCircle = opt && opt.hasOwnProperty('pointAsCircle')\n    ? opt.pointAsCircle : false;\n  var ele ='<path';\n  if((type == 'Point' || type == 'MultiPoint') && pointAsCircle) {\n    ele = '<circle';\n  }\n  for(var key in json) {\n    ele += ' ' + key +'=\"' + json[key] + '\"';\n  }\n  ele += '/>';\n  return ele;\n}\n\nfunction valueAt(obj,path) {\n  //taken from http://stackoverflow.com/a/6394168/713573\n  function index(prev,cur, i, arr) {\n    if (prev.hasOwnProperty(cur)) {\n      return prev[cur];\n    } else {\n      throw new Error(arr.slice(0,i+1).join('.') + ' is not a valid property path');\n    }\n  }\n  return path.split('.').reduce(index, obj);\n}\nmodule.exports = {GeoJSON2SVG};\n"
   ]
 }
\ No newline at end of file
diff --git a/dist/geojson2svg.min.js b/dist/geojson2svg.min.js
index b625fce..457e9ec 100644
--- a/dist/geojson2svg.min.js
+++ b/dist/geojson2svg.min.js
@@ -1 +1 @@
-!function(f){"object"==typeof exports&&"undefined"!=typeof module?module.exports=f():"function"==typeof define&&define.amd?define([],f):("undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this).GeoJSON2SVG=f()}(function(){return function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);throw(f=new Error("Cannot find module '"+i+"'")).code="MODULE_NOT_FOUND",f}c=n[i]={exports:{}},e[i][0].call(c.exports,function(r){return o(e[i][1][r]||r)},c,c.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}({1:[function(require,module,exports){require=require("./src/index.js").GeoJSON2SVG;module.exports=require},{"./src/index.js":6}],2:[function(require,module,exports){"use strict";function isArray(arr){return"function"==typeof Array.isArray?Array.isArray(arr):"[object Array]"===toStr.call(arr)}function isPlainObject(obj){if(obj&&"[object Object]"===toStr.call(obj)){var key,hasOwnConstructor=hasOwn.call(obj,"constructor"),hasIsPrototypeOf=obj.constructor&&obj.constructor.prototype&&hasOwn.call(obj.constructor.prototype,"isPrototypeOf");if(!obj.constructor||hasOwnConstructor||hasIsPrototypeOf){for(key in obj);return void 0===key||hasOwn.call(obj,key)}}}function setProperty(target,options){defineProperty&&"__proto__"===options.name?defineProperty(target,options.name,{enumerable:!0,configurable:!0,value:options.newValue,writable:!0}):target[options.name]=options.newValue}function getProperty(obj,name){if("__proto__"===name){if(!hasOwn.call(obj,name))return;if(gOPD)return gOPD(obj,name).value}return obj[name]}var hasOwn=Object.prototype.hasOwnProperty,toStr=Object.prototype.toString,defineProperty=Object.defineProperty,gOPD=Object.getOwnPropertyDescriptor;module.exports=function extend(){var options,name,copy,copyIsArray,src,target=arguments[0],i=1,length=arguments.length,deep=!1;for("boolean"==typeof target&&(deep=target,target=arguments[1]||{},i=2),(null==target||"object"!=typeof target&&"function"!=typeof target)&&(target={});i<length;++i)if(null!=(options=arguments[i]))for(name in options)src=getProperty(target,name),target!==(copy=getProperty(options,name))&&(deep&&copy&&(isPlainObject(copy)||(copyIsArray=isArray(copy)))?(src=copyIsArray?(copyIsArray=!1,src&&isArray(src)?src:[]):src&&isPlainObject(src)?src:{},setProperty(target,{name:name,newValue:extend(deep,src,copy)})):void 0!==copy&&setProperty(target,{name:name,newValue:copy}));return target}},{}],3:[function(require,module,exports){module.exports=function(gj){var bbox;if(gj.hasOwnProperty("type"))return gj=function getCoordinatesDump(gj){var coords;"Point"==gj.type?coords=[gj.coordinates]:"LineString"==gj.type||"MultiPoint"==gj.type?coords=gj.coordinates:"Polygon"==gj.type||"MultiLineString"==gj.type?coords=gj.coordinates.reduce(function(dump,part){return dump.concat(part)},[]):"MultiPolygon"==gj.type?coords=gj.coordinates.reduce(function(dump,poly){return dump.concat(poly.reduce(function(points,part){return points.concat(part)},[]))},[]):"Feature"==gj.type?coords=getCoordinatesDump(gj.geometry):"GeometryCollection"==gj.type?coords=gj.geometries.reduce(function(dump,g){return dump.concat(getCoordinatesDump(g))},[]):"FeatureCollection"==gj.type&&(coords=gj.features.reduce(function(dump,f){return dump.concat(getCoordinatesDump(f))},[]));return coords}(gj),bbox=[Number.POSITIVE_INFINITY,Number.POSITIVE_INFINITY,Number.NEGATIVE_INFINITY,Number.NEGATIVE_INFINITY],gj.reduce(function(prev,coord){return[Math.min(coord[0],prev[0]),Math.min(coord[1],prev[1]),Math.max(coord[0],prev[2]),Math.max(coord[1],prev[3])]},bbox)}},{}],4:[function(require,module,exports){var singles,multies,multigeojson;singles=["Point","LineString","Polygon"],multies=["MultiPoint","MultiLineString","MultiPolygon"],multigeojson={explode:function(g){return-1<multies.indexOf(g.type)&&g.coordinates.map(function(part){var single={};return single.type=g.type.replace("Multi",""),single.coordinates=part,g.crs&&(single.crs=g.crs),single})},implode:function(gs){var multi,sameType=gs.every(function(g){return-1<singles.indexOf(g.type)}),crs=gs[0].crs||0,sameCrs=gs.every(function(g){return(g.crs||0)==crs});return!(!sameType||!sameCrs)&&((multi={}).type="Multi"+gs[0].type,multi.coordinates=[],0!=crs&&(multi.crs=crs),gs.forEach(function(g){multi.coordinates.push(g.coordinates)}),multi)}},void 0!==module&&module.exports?module.exports=multigeojson:window&&(window.multigeojson=multigeojson)},{}],5:[function(require,module,exports){var multi=require("multigeojson");function getCoordString(coords,res,origin,precision,opt){return coords.map(function(coord){return[((coord=opt.coordinateConverter?opt.coordinateConverter(coord):coord)[0]-origin.x)/res,(origin.y-coord[1])/res]}).map(function(coord){return precision?coord[0].toFixed(precision)+","+coord[1].toFixed(precision):coord[0]+","+coord[1]}).join(" ")}function point(geom,res,origin,opt){var r=opt&&opt.r?opt.r:1,pointAsCircle=!(!opt||!opt.hasOwnProperty("pointAsCircle"))&&opt.pointAsCircle,geom=getCoordString([geom.coordinates],res,origin,opt.precision,opt);return pointAsCircle?[geom]:["M"+geom+" m"+-r+",0 a"+r+","+r+" 0 1,1 "+2*r+",0 a"+r+","+r+" 0 1,1 "+-2*r+",0"]}function lineString(geom,res,origin,opt){return["M"+getCoordString(geom.coordinates,res,origin,opt.precision,opt)]}function polygon(geom,res,origin,opt){var holes,path="M"+getCoordString(geom.coordinates[0],res,origin,opt.precision,opt);if(holes=1<geom.coordinates.length?geom.coordinates.slice(1,geom.coordinates.length):holes)for(var i=0;i<holes.length;i++)path+=" M"+getCoordString(holes[i],res,origin,opt.precision,opt);return[path+="Z"]}module.exports={Point:point,MultiPoint:function(geom,res,origin,opt){var explode=!(!opt||!opt.hasOwnProperty("explode"))&&opt.explode,geom=multi.explode(geom).map(function(single){return point(single,res,origin,opt)[0]});return explode?geom:[geom.join(" ")]},LineString:lineString,MultiLineString:function(geom,res,origin,opt){var explode=!(!opt||!opt.hasOwnProperty("explode"))&&opt.explode,geom=multi.explode(geom).map(function(single){return lineString(single,res,origin,opt)[0]});return explode?geom:[geom.join(" ")]},Polygon:polygon,MultiPolygon:function(geom,res,origin,opt){var explode=!!opt.hasOwnProperty("explode")&&opt.explode,geom=multi.explode(geom).map(function(single){return polygon(single,res,origin,opt)[0]});return explode?geom:[geom.join(" ").replace(/Z/g,"")+"Z"]}}},{multigeojson:4}],6:[function(require,module,exports){function GeoJSON2SVG(options={}){if(options.mapExtent?this.mapExtentFromGeojson=options.mapExtentFromGeojson:this.mapExtentFromGeojson=!0,options.fitTo&&!/^(width|height)$/i.test(options.fitTo))throw new Error('"fitTo" option should be "width" or "height" ');if(this.options=options,this.viewportSize=options.viewportSize||{width:256,height:256},options.coordinateCoverter&&"function"!=typeof options.coordinateConverter)throw new Error('"coordinateConverter" option should be function');var rightTop,leftBottom;this.coordinateConverter=options.coordinateConverter,options.mapExtent&&this.coordinateConverter?(rightTop=this.coordinateConverter([options.mapExtent.right,options.mapExtent.top]),leftBottom=this.coordinateConverter([options.mapExtent.left,options.mapExtent.bottom]),this.mapExtent={left:leftBottom[0],bottom:leftBottom[1],right:rightTop[0],top:rightTop[1]}):this.mapExtent=options.mapExtent,this.mapExtent&&(this.res=this.calResolution(this.mapExtent,this.viewportSize,this.options.fitTo))}var bbox=require("geojson-bbox"),extend=require("extend"),converter=require("./converter.js");function valueAt(obj,path){return path.split(".").reduce(function(prev,cur,i,arr){if(prev.hasOwnProperty(cur))return prev[cur];throw new Error(arr.slice(0,i+1).join(".")+" is not a valid property path")},obj)}GeoJSON2SVG.prototype.calResolution=function(extent,size,fitTo){var xres=(extent.right-extent.left)/size.width,extent=(extent.top-extent.bottom)/size.height;if(fitTo){if("width"===fitTo.toLowerCase())return xres;if("height"===fitTo.toLowerCase())return extent;throw new Error('"fitTo" option should be "width" or "height" ')}return Math.max(xres,extent)},GeoJSON2SVG.prototype.convert=function(geojson,options){var extent,resetExtent=!1,opt=(!this.res&&this.mapExtentFromGeojson&&(resetExtent=!0,extent=bbox(geojson),this.coordinateConverter&&(extent=function(extent,converter){var leftBottom=converter([extent[0],extent[1]]),converter=converter([extent[2],extent[3]]);return[...leftBottom,...converter]}(extent,this.coordinateConverter)),this.mapExtent={left:extent[0],bottom:extent[1],right:extent[2],top:extent[3]},this.res=this.calResolution(this.mapExtent,this.viewportSize,this.options.fitTo)),extend(!0,{},this.options,options||{})),svgElements=[];if("FeatureCollection"==geojson.type)for(var i=0;i<geojson.features.length;i++)svgElements=svgElements.concat(this.convertFeature(geojson.features[i],opt));else if("Feature"==geojson.type)svgElements=this.convertFeature(geojson,opt);else if("GeometryCollection"==geojson.type)for(i=0;i<geojson.geometries.length;i++)svgElements=svgElements.concat(this.convertGeometry(geojson.geometries[i],opt));else{if(!converter[geojson.type])throw new Error("Geojson type not supported.");svgElements=this.convertGeometry(geojson,opt)}return resetExtent&&(this.res=null,this.mapExtent=null),opt.callback&&opt.callback.call(this,svgElements),svgElements},GeoJSON2SVG.prototype.convertFeature=function(feature,options){var arr;if(feature||feature.geometry)return(options=extend(!0,{},this.options,options||{})).attributes&&options.attributes instanceof Array?(arr=options.attributes,options.attributes=arr.reduce(function(sum,property){if("string"==typeof property){var key=property.split(".").pop();try{val=valueAt(feature,property)}catch(e){val=!1}val&&(sum[key]=val)}else if("object"==typeof property&&property.type&&property.property)if("dynamic"===property.type){var val,key=property.key||property.property.split(".").pop();try{val=valueAt(feature,property.property)}catch(e){val=!1}val&&(sum[key]=val)}else"static"===property.type&&property.value&&(sum[property.property]=property.value);return sum},{})):options.attributes=options.attributes||{},(arr=options.attributes.id||feature.id||(feature.properties&&feature.properties.id?feature.properties.id:null))&&(options.attributes.id=arr),this.convertGeometry(feature.geometry,options)},GeoJSON2SVG.prototype.convertGeometry=function(geom,options){var opt,paths;if(converter[geom.type])return options=(opt=extend(!0,{},this.options,options||{})).output||"svg",paths=converter[geom.type].call(this,geom,this.res,{x:this.mapExtent.left,y:this.mapExtent.top},opt),"svg"==options.toLowerCase()?paths.map(function(path){return function(path,type,attributes,opt){var key,svg={},pointAsCircle=!(!opt||!opt.hasOwnProperty("pointAsCircle"))&&opt.pointAsCircle;"Point"!=type&&"MultiPoint"!=type||!pointAsCircle?(svg={d:path},"Polygon"!=type&&"MultiPolygon"!=type||svg["fill-rule"]):(svg.cx=path.split(",")[0],svg.cy=path.split(",")[1],svg.r=opt&&opt.r?opt.r:"1");for(key in attributes)svg[key]=attributes[key];return svg}(path,geom.type,opt.attributes,opt)}).map(function(json){return function(json,type,opt){var key,opt=!(!opt||!opt.hasOwnProperty("pointAsCircle"))&&opt.pointAsCircle,ele="<path";"Point"!=type&&"MultiPoint"!=type||!opt||(ele="<circle");for(key in json)ele+=" "+key+'="'+json[key]+'"';return ele+="/>"}(json,geom.type,opt)}):paths;throw new Error("Geojson type not supported.")},module.exports={GeoJSON2SVG:GeoJSON2SVG}},{"./converter.js":5,extend:2,"geojson-bbox":3}]},{},[1])(1)});
+!function(f){"object"==typeof exports&&"undefined"!=typeof module?module.exports=f():"function"==typeof define&&define.amd?define([],f):("undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this).GeoJSON2SVG=f()}(function(){return function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);throw(f=new Error("Cannot find module '"+i+"'")).code="MODULE_NOT_FOUND",f}c=n[i]={exports:{}},e[i][0].call(c.exports,function(r){return o(e[i][1][r]||r)},c,c.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}({1:[function(require,module,exports){require=require("./src/index.js").GeoJSON2SVG;module.exports=require},{"./src/index.js":6}],2:[function(require,module,exports){"use strict";function isArray(arr){return"function"==typeof Array.isArray?Array.isArray(arr):"[object Array]"===toStr.call(arr)}function isPlainObject(obj){if(obj&&"[object Object]"===toStr.call(obj)){var key,hasOwnConstructor=hasOwn.call(obj,"constructor"),hasIsPrototypeOf=obj.constructor&&obj.constructor.prototype&&hasOwn.call(obj.constructor.prototype,"isPrototypeOf");if(!obj.constructor||hasOwnConstructor||hasIsPrototypeOf){for(key in obj);return void 0===key||hasOwn.call(obj,key)}}}function setProperty(target,options){defineProperty&&"__proto__"===options.name?defineProperty(target,options.name,{enumerable:!0,configurable:!0,value:options.newValue,writable:!0}):target[options.name]=options.newValue}function getProperty(obj,name){if("__proto__"===name){if(!hasOwn.call(obj,name))return;if(gOPD)return gOPD(obj,name).value}return obj[name]}var hasOwn=Object.prototype.hasOwnProperty,toStr=Object.prototype.toString,defineProperty=Object.defineProperty,gOPD=Object.getOwnPropertyDescriptor;module.exports=function extend(){var options,name,copy,copyIsArray,src,target=arguments[0],i=1,length=arguments.length,deep=!1;for("boolean"==typeof target&&(deep=target,target=arguments[1]||{},i=2),(null==target||"object"!=typeof target&&"function"!=typeof target)&&(target={});i<length;++i)if(null!=(options=arguments[i]))for(name in options)src=getProperty(target,name),target!==(copy=getProperty(options,name))&&(deep&&copy&&(isPlainObject(copy)||(copyIsArray=isArray(copy)))?(src=copyIsArray?(copyIsArray=!1,src&&isArray(src)?src:[]):src&&isPlainObject(src)?src:{},setProperty(target,{name:name,newValue:extend(deep,src,copy)})):void 0!==copy&&setProperty(target,{name:name,newValue:copy}));return target}},{}],3:[function(require,module,exports){module.exports=function(gj){var bbox;if(gj.hasOwnProperty("type"))return gj=function getCoordinatesDump(gj){var coords;"Point"==gj.type?coords=[gj.coordinates]:"LineString"==gj.type||"MultiPoint"==gj.type?coords=gj.coordinates:"Polygon"==gj.type||"MultiLineString"==gj.type?coords=gj.coordinates.reduce(function(dump,part){return dump.concat(part)},[]):"MultiPolygon"==gj.type?coords=gj.coordinates.reduce(function(dump,poly){return dump.concat(poly.reduce(function(points,part){return points.concat(part)},[]))},[]):"Feature"==gj.type?coords=getCoordinatesDump(gj.geometry):"GeometryCollection"==gj.type?coords=gj.geometries.reduce(function(dump,g){return dump.concat(getCoordinatesDump(g))},[]):"FeatureCollection"==gj.type&&(coords=gj.features.reduce(function(dump,f){return dump.concat(getCoordinatesDump(f))},[]));return coords}(gj),bbox=[Number.POSITIVE_INFINITY,Number.POSITIVE_INFINITY,Number.NEGATIVE_INFINITY,Number.NEGATIVE_INFINITY],gj.reduce(function(prev,coord){return[Math.min(coord[0],prev[0]),Math.min(coord[1],prev[1]),Math.max(coord[0],prev[2]),Math.max(coord[1],prev[3])]},bbox)}},{}],4:[function(require,module,exports){var singles,multies,multigeojson;singles=["Point","LineString","Polygon"],multies=["MultiPoint","MultiLineString","MultiPolygon"],multigeojson={explode:function(g){return-1<multies.indexOf(g.type)&&g.coordinates.map(function(part){var single={};return single.type=g.type.replace("Multi",""),single.coordinates=part,g.crs&&(single.crs=g.crs),single})},implode:function(gs){var multi,sameType=gs.every(function(g){return-1<singles.indexOf(g.type)}),crs=gs[0].crs||0,sameCrs=gs.every(function(g){return(g.crs||0)==crs});return!(!sameType||!sameCrs)&&((multi={}).type="Multi"+gs[0].type,multi.coordinates=[],0!=crs&&(multi.crs=crs),gs.forEach(function(g){multi.coordinates.push(g.coordinates)}),multi)}},void 0!==module&&module.exports?module.exports=multigeojson:window&&(window.multigeojson=multigeojson)},{}],5:[function(require,module,exports){var multi=require("multigeojson");function getCoordString(coords,res,origin,precision,opt){return coords.map(function(coord){return[((coord=opt.coordinateConverter?opt.coordinateConverter(coord):coord)[0]-origin.x)/res,(origin.y-coord[1])/res]}).map(function(coord){return precision?coord[0].toFixed(precision)+","+coord[1].toFixed(precision):coord[0]+","+coord[1]}).join(" ")}function point(geom,res,origin,opt){var r=opt&&opt.r?opt.r:1,pointAsCircle=!(!opt||!opt.hasOwnProperty("pointAsCircle"))&&opt.pointAsCircle,geom=getCoordString([geom.coordinates],res,origin,opt.precision,opt);return pointAsCircle?[geom]:["M"+geom+" m"+-r+",0 a"+r+","+r+" 0 1,1 "+2*r+",0 a"+r+","+r+" 0 1,1 "+-2*r+",0"]}function lineString(geom,res,origin,opt){return["M"+getCoordString(geom.coordinates,res,origin,opt.precision,opt)]}function polygon(geom,res,origin,opt){var holes,path="M"+getCoordString(geom.coordinates[0],res,origin,opt.precision,opt);if(holes=1<geom.coordinates.length?geom.coordinates.slice(1,geom.coordinates.length):holes)for(var i=0;i<holes.length;i++)path+=" M"+getCoordString(holes[i],res,origin,opt.precision,opt);return[path+="Z"]}module.exports={Point:point,MultiPoint:function(geom,res,origin,opt){var explode=!(!opt||!opt.hasOwnProperty("explode"))&&opt.explode,geom=multi.explode(geom).map(function(single){return point(single,res,origin,opt)[0]});return explode?geom:[geom.join(" ")]},LineString:lineString,MultiLineString:function(geom,res,origin,opt){var explode=!(!opt||!opt.hasOwnProperty("explode"))&&opt.explode,geom=multi.explode(geom).map(function(single){return lineString(single,res,origin,opt)[0]});return explode?geom:[geom.join(" ")]},Polygon:polygon,MultiPolygon:function(geom,res,origin,opt){var explode=!!opt.hasOwnProperty("explode")&&opt.explode,geom=multi.explode(geom).map(function(single){return polygon(single,res,origin,opt)[0]});return explode?geom:[geom.join(" ").replace(/Z/g,"")+"Z"]}}},{multigeojson:4}],6:[function(require,module,exports){function GeoJSON2SVG(options={}){if(options.mapExtent?this.mapExtentFromGeojson=options.mapExtentFromGeojson:this.mapExtentFromGeojson=!0,options.fitTo&&!/^(width|height)$/i.test(options.fitTo))throw new Error('"fitTo" option should be "width" or "height" ');if(this.options=options,this.viewportSize=options.viewportSize||{width:256,height:256},options.coordinateConverter&&"function"!=typeof options.coordinateConverter)throw new Error('"coordinateConverter" option should be function');var rightTop,leftBottom;this.coordinateConverter=options.coordinateConverter,options.mapExtent&&this.coordinateConverter?(rightTop=this.coordinateConverter([options.mapExtent.right,options.mapExtent.top]),leftBottom=this.coordinateConverter([options.mapExtent.left,options.mapExtent.bottom]),this.mapExtent={left:leftBottom[0],bottom:leftBottom[1],right:rightTop[0],top:rightTop[1]}):this.mapExtent=options.mapExtent,this.mapExtent&&(this.res=this.calResolution(this.mapExtent,this.viewportSize,this.options.fitTo))}var bbox=require("geojson-bbox"),extend=require("extend"),converter=require("./converter.js");function valueAt(obj,path){return path.split(".").reduce(function(prev,cur,i,arr){if(prev.hasOwnProperty(cur))return prev[cur];throw new Error(arr.slice(0,i+1).join(".")+" is not a valid property path")},obj)}GeoJSON2SVG.prototype.calResolution=function(extent,size,fitTo){var xres=(extent.right-extent.left)/size.width,extent=(extent.top-extent.bottom)/size.height;if(fitTo){if("width"===fitTo.toLowerCase())return xres;if("height"===fitTo.toLowerCase())return extent;throw new Error('"fitTo" option should be "width" or "height" ')}return Math.max(xres,extent)},GeoJSON2SVG.prototype.convert=function(geojson,options){var extent,resetExtent=!1,opt=(!this.res&&this.mapExtentFromGeojson&&(resetExtent=!0,extent=bbox(geojson),this.coordinateConverter&&(extent=function(extent,converter){var leftBottom=converter([extent[0],extent[1]]),converter=converter([extent[2],extent[3]]);return[...leftBottom,...converter]}(extent,this.coordinateConverter)),this.mapExtent={left:extent[0],bottom:extent[1],right:extent[2],top:extent[3]},this.res=this.calResolution(this.mapExtent,this.viewportSize,this.options.fitTo)),extend(!0,{},this.options,options||{})),svgElements=[];if("FeatureCollection"==geojson.type)for(var i=0;i<geojson.features.length;i++)svgElements=svgElements.concat(this.convertFeature(geojson.features[i],opt));else if("Feature"==geojson.type)svgElements=this.convertFeature(geojson,opt);else if("GeometryCollection"==geojson.type)for(i=0;i<geojson.geometries.length;i++)svgElements=svgElements.concat(this.convertGeometry(geojson.geometries[i],opt));else{if(!converter[geojson.type])throw new Error("Geojson type not supported.");svgElements=this.convertGeometry(geojson,opt)}return resetExtent&&(this.res=null,this.mapExtent=null),opt.callback&&opt.callback.call(this,svgElements),svgElements},GeoJSON2SVG.prototype.convertFeature=function(feature,options){var arr;if(feature||feature.geometry)return(options=extend(!0,{},this.options,options||{})).attributes&&options.attributes instanceof Array?(arr=options.attributes,options.attributes=arr.reduce(function(sum,property){if("string"==typeof property){var key=property.split(".").pop();try{val=valueAt(feature,property)}catch(e){val=!1}val&&(sum[key]=val)}else if("object"==typeof property&&property.type&&property.property)if("dynamic"===property.type){var val,key=property.key||property.property.split(".").pop();try{val=valueAt(feature,property.property)}catch(e){val=!1}val&&(sum[key]=val)}else"static"===property.type&&property.value&&(sum[property.property]=property.value);return sum},{})):options.attributes=options.attributes||{},(arr=options.attributes.id||feature.id||(feature.properties&&feature.properties.id?feature.properties.id:null))&&(options.attributes.id=arr),this.convertGeometry(feature.geometry,options)},GeoJSON2SVG.prototype.convertGeometry=function(geom,options){var opt,paths;if(converter[geom.type])return options=(opt=extend(!0,{},this.options,options||{})).output||"svg",paths=converter[geom.type].call(this,geom,this.res,{x:this.mapExtent.left,y:this.mapExtent.top},opt),"svg"==options.toLowerCase()?paths.map(function(path){return function(path,type,attributes,opt){var key,svg={},pointAsCircle=!(!opt||!opt.hasOwnProperty("pointAsCircle"))&&opt.pointAsCircle;"Point"!=type&&"MultiPoint"!=type||!pointAsCircle?(svg={d:path},"Polygon"!=type&&"MultiPolygon"!=type||svg["fill-rule"]):(svg.cx=path.split(",")[0],svg.cy=path.split(",")[1],svg.r=opt&&opt.r?opt.r:"1");for(key in attributes)svg[key]=attributes[key];return svg}(path,geom.type,opt.attributes,opt)}).map(function(json){return function(json,type,opt){var key,opt=!(!opt||!opt.hasOwnProperty("pointAsCircle"))&&opt.pointAsCircle,ele="<path";"Point"!=type&&"MultiPoint"!=type||!opt||(ele="<circle");for(key in json)ele+=" "+key+'="'+json[key]+'"';return ele+="/>"}(json,geom.type,opt)}):paths;throw new Error("Geojson type not supported.")},module.exports={GeoJSON2SVG:GeoJSON2SVG}},{"./converter.js":5,extend:2,"geojson-bbox":3}]},{},[1])(1)});
diff --git a/src/index.d.ts b/src/index.d.ts
index c5c0cab..6021f35 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -66,6 +66,9 @@ declare module 'geojson2svg' {
     /** Fit ouput svg map to width or height. */
     fitTo?: 'width' | 'height'
 
+    /** Convert input GeoJSON coordinates while converting to SVG. This function should take coordinates of a point [x,y] and returns transformed point [x, y] */
+    coordinateConverter?: (point: [number, number]) => [number, number],
+
     /** a number, precision of output svg coordinates. */
     precision?: number
 
diff --git a/src/index.js b/src/index.js
index 4b25b5c..272473f 100644
--- a/src/index.js
+++ b/src/index.js
@@ -16,7 +16,7 @@ var GeoJSON2SVG = function(options = {}) {
   this.options = options;
   this.viewportSize = options.viewportSize ||
     {width: 256, height: 256};
-  if (options.coordinateCoverter
+  if (options.coordinateConverter
     && typeof options.coordinateConverter != 'function')
   {
     throw new Error('"coordinateConverter" option should be function');