enable custom tile matrix sets (geopython#2074) (geopython#2092)

* leverage custom tiling schemes in MVT tile providers

* use tile schemes if exists

* fix ref, docstrings/comments (thanks @lindakarlovska)

* fix doc ref

Author: tomkralidis

docs/source/data-publishing/ogcapi-tiles.rst

@@ -103,12 +103,12 @@ Following block shows how to configure pygeoapi to read Mapbox vector tiles from
        - type: tile
          name: MVT-proxy
          data: http://localhost:7800/public.ne_50m_admin_0_countries/{z}/{x}/{y}.mvt
-            options:
-              zoom:
-                min: 0
-                max: 15
-              schemes:
-                - WebMercatorQuad # this option is needed in the MVT-proxy provider
+         options:
+             zoom:
+                 min: 0
+                 max: 15
+             schemes:
+                 - WebMercatorQuad # this option is needed in the MVT-proxy provider
          format:
              name: pbf
              mimetype: application/vnd.mapbox-vector-tile

pygeoapi/provider/base_mvt.py

@@ -71,14 +71,18 @@ def get_layer(self):
         raise NotImplementedError()
 
     def get_tiling_schemes(self):
+        if self.schemes:
+            LOGGER.debug('Using custom TMS definition')
+            tile_matrix_set_links = [
+                item.value for item in TileMatrixSetEnum
+                if item.value.tileMatrixSet in self.schemes]
 
-        tile_matrix_set_links_list = [
-            TileMatrixSetEnum.WORLDCRS84QUAD.value,
-            TileMatrixSetEnum.WEBMERCATORQUAD.value
-        ]
-        tile_matrix_set_links = [
-            item for item in tile_matrix_set_links_list
-            if item.tileMatrixSet in self.options['schemes']]
+        else:
+            LOGGER.debug('Using default TMS definitions')
+            tile_matrix_set_links = [
+                TileMatrixSetEnum.WORLDCRS84QUAD.value,
+                TileMatrixSetEnum.WEBMERCATORQUAD.value
+            ]
 
         return tile_matrix_set_links
 

pygeoapi/provider/mvt_elastic.py

@@ -122,7 +122,7 @@ def get_layer(self):
 
     def get_tiling_schemes(self):
 
-        "Only WebMercatorQuad tiling scheme is supported in elastic"
+        "Only WebMercatorQuad tiling scheme is supported in Elasticsearch"
         return [
                 TileMatrixSetEnum.WEBMERCATORQUAD.value
             ]

pygeoapi/provider/mvt_postgresql.py

@@ -99,6 +99,11 @@ def get_layer(self):
         return self.table
 
     def get_tiling_schemes(self):
+        """
+        Only WebMercatorQuad and WorldCRS84Quad tiling schemes
+        are supported for PostgreSQL
+        """
+
         return [
             TileMatrixSetEnum.WEBMERCATORQUAD.value,
             TileMatrixSetEnum.WORLDCRS84QUAD.value

pygeoapi/provider/mvt_tippecanoe.py

@@ -139,7 +139,8 @@ def get_layer(self):
             return Path(self.data).name
 
     def get_tiling_schemes(self):
-        "Only WebMercatorQuad tiling scheme is supported in elastic"
+        "Only WebMercatorQuad tiling scheme is supported in tippecanoe"
+
         return [TileMatrixSetEnum.WEBMERCATORQUAD.value]
 
     def get_tiles_service(self, baseurl=None, servicepath=None,

pygeoapi/provider/tile.py

@@ -58,6 +58,7 @@ def __init__(self, provider_def):
         self.format_type = provider_def['format']['name']
         self.mimetype = provider_def['format']['mimetype']
         self.options = provider_def.get('options')
+        self.schemes = self.options.get('schemes', [])
         self.tile_type = None
 
     def get_layer(self):