location.schema.json

{
    "primaryKey": "loc_id",
    "missingValues": [
        "NaN"
    ],
    "fields": [
        {
            "name": "loc_id",
            "type": "any",
            "description": "Primary key. Location ID.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "link_id",
            "type": "any",
            "foreign_key": "link.link_id",
            "description": "Required. Road Link ID. Foreign Key from Road_Link.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "ref_node_id",
            "type": "any",
            "foreign_key": "node.node_id",
            "description": "Required. The From node of the link. Foreign Key from Node.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "lr",
            "type": "number",
            "description": "Required. Linear Reference of the location, measured as distance in short_length units along the link from the reference node.  If link_geometry exists, it is used. Otherwise, link geometry is assumed to be a crow-fly distance from A node to B node.",
            "constraints": {
                "required": true,
                "minimum": 0
            }
        },
        {
            "name": "x_coord",
            "type": "number",
            "description": "Optional. Either provided, or derived from Link, Ref_Node and LR."
        },
        {
            "name": "y_coord",
            "type": "number",
            "description": "Optional. Either provided, or derived from Link, Ref_Node and LR."
        },
        {
            "name": "z_coord",
            "type": "number",
            "description": "Optional. Altitude in short_length units."
        },
        {
            "name": "loc_type",
            "type": "string",
            "description": "Optional. What it represents (driveway, bus stop, etc.) OpenStreetMap map feature names are recommended."
        },
        {
            "name": "zone_id",
            "type": "any",
            "description": "Optional. Foreign Key, Associated zone"
        },
        {
            "name": "gtfs_stop_id",
            "type": "string",
            "description": "Optional. Foreign Key to GTFS data. For bus stops and transit station entrances, provides a link to the General Transit Feed Specification."
        }
    ],
    "name": "location.schema.json",
    "description": "A location is a vertex that is associated with a specific location along a link. Locations may be used to represent places where activities occur (e.g., driveways and bus stops). Its attributes are nearly the same as those for a node, except that the location includes an associated link and node, with location specified as distance along the link from the node."
}