Adds support for IAU codes.

CHANGELOG.md

@@ -6,14 +6,22 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- The new field `proj:code` was introduced as a more general way to describe projection codes for various authorities, not just EPSG.
+
+### Deprecated
+
+- `proj:espg` was deprecated in favor of `proj:code`.
+  A former `"proj:epsg": 3857` is now `"proj:code": "EPSG:3857"`.
+
 ## [v1.1.0] - 2023-02-10
 
 ### Added
 
 - Added examples for Collections and Assets (in Items)
 
 ### Changed
-
 - `proj:epsg` is not required in Item properties anymore. `proj:epsg` is recommended now, but not required in any scope.
 - Updated the PROJJSON schema to v0.5
 

examples/assets.json

@@ -43,7 +43,7 @@
     "created": "2020-12-12T01:48:13.725Z",
     "updated": "2020-12-12T01:48:13.725Z",
     "platform": "cool_sat2",
-    "proj:epsg": 32659,
+    "proj:code": "EPSG:32659",
     "instruments": [
       "cool_sensor_v1"
     ]
@@ -64,7 +64,7 @@
         "data"
       ],
       "gsd": 0.66,
-      "proj:epsg": 32659,
+      "proj:code": "EPSG:32659",
       "proj:shape": [
         5558,
         9559
@@ -84,7 +84,7 @@
     "thumbnail": {
       "href": "https://storage.googleapis.com/open-cogs/stac-examples/20201211_223832_CS2.jpg",
       "title": "Thumbnail",
-      "proj:epsg": null,
+      "proj:code": null,
       "proj:shape": [
         800,
         800

examples/collection.json

@@ -28,7 +28,7 @@
         "data"
       ],
       "gsd": 0.66,
-      "proj:epsg": 32659,
+      "proj:code": "EPSG:32659",
       "proj:shape": [
         5558,
         9559
@@ -56,7 +56,7 @@
     "gsd": [
       0.66
     ],
-    "proj:epsg": [
+    "proj:code": [
       32659,
       null
     ]

examples/item.json

@@ -47,7 +47,7 @@
       "cool_sensor_v1"
     ],
     "gsd": 0.66,
-    "proj:epsg": 32659,
+    "proj:code": "EPSG:32659",
     "proj:shape": [
       5558,
       9559

examples/item_custom_proj.json

@@ -0,0 +1,93 @@
+{
+  "stac_version": "1.0.0",
+  "stac_extensions": [
+    "https://stac-extensions.github.io/projection/v1.1.0/schema.json"
+  ],
+  "type": "Feature",
+  "id": "20201211_223832_CS2",
+  "bbox": [
+    172.91173669923782,
+    1.3438851951615003,
+    172.95469614953714,
+    1.3690476620161975
+  ],
+  "geometry": {
+    "type": "Polygon",
+    "coordinates": [
+      [
+        [
+          172.91173669923782,
+          1.3438851951615003
+        ],
+        [
+          172.95469614953714,
+          1.3438851951615003
+        ],
+        [
+          172.95469614953714,
+          1.3690476620161975
+        ],
+        [
+          172.91173669923782,
+          1.3690476620161975
+        ],
+        [
+          172.91173669923782,
+          1.3438851951615003
+        ]
+      ]
+    ]
+  },
+  "properties": {
+    "datetime": "2020-12-11T22:38:32.125Z",
+    "created": "2020-12-12T01:48:13.725Z",
+    "updated": "2020-12-12T01:48:13.725Z",
+    "platform": "cool_sat2",
+    "instruments": [
+      "cool_sensor_v1"
+    ],
+    "gsd": 0.66,
+    "proj:code": "IAU_2015:49900",
+    "proj:shape": [
+      5558,
+      9559
+    ],
+    "proj:transform": [
+      0.5,
+      0,
+      712710,
+      0,
+      -0.5,
+      151406,
+      0,
+      0,
+      1
+    ]
+  },
+  "links": [
+    {
+      "href": "./collection.json",
+      "rel": "collection",
+      "type": "application/json"
+    }
+  ],
+  "assets": {
+    "analytic": {
+      "href": "https://storage.googleapis.com/open-cogs/stac-examples/20201211_223832_CS2_analytic.tif",
+      "type": "image/tiff; application=geotiff; profile=cloud-optimized",
+      "title": "4-Band Analytic",
+      "roles": [
+        "data"
+      ]
+    },
+    "visual": {
+      "href": "https://storage.googleapis.com/open-cogs/stac-examples/20201211_223832_CS2.tif",
+      "type": "image/tiff; application=geotiff; profile=cloud-optimized",
+      "title": "3-Band Visual",
+      "roles": [
+        "visual"
+      ]
+    }
+  },
+  "collection": "proj-example"
+}

json-schema/schema.json

@@ -86,9 +86,17 @@
       "type": "object",
       "properties": {
         "proj:epsg":{
+          "deprecated": true,
           "title":"EPSG code",
           "type":[
-            "integer",
+            "string",
+            "null"
+          ]
+        },
+        "proj:code":{
+          "title":"Projection code",
+          "type":[
+            "string",
             "null"
           ]
         },