Allow centroid for other geometry types in yaml configs (#945)

planetiler-core/src/main/java/com/onthegomap/planetiler/geo/GeometryType.java

@@ -13,7 +13,12 @@
 import vector_tile.VectorTileProto;
 
 public enum GeometryType {
-  UNKNOWN(VectorTileProto.Tile.GeomType.UNKNOWN, 0, "unknown"),
+  UNKNOWN(VectorTileProto.Tile.GeomType.UNKNOWN, 0, "unknown") {
+    @Override
+    public Expression featureTest() {
+      return Expression.TRUE;
+    }
+  },
   @JsonProperty("point")
   POINT(VectorTileProto.Tile.GeomType.POINT, 1, "point"),
   @JsonProperty("line")

planetiler-core/src/test/java/com/onthegomap/planetiler/geo/GeometryTypeTest.java

@@ -3,7 +3,6 @@
 import static java.util.Collections.emptyList;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
-import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import com.onthegomap.planetiler.TestUtils;
@@ -42,9 +41,9 @@ void testGeometryFactory() {
     assertFalse(GeometryType.POLYGON.featureTest().evaluate(point));
     assertTrue(GeometryType.POLYGON.featureTest().evaluate(poly));
 
-    assertThrows(Exception.class, () -> GeometryType.UNKNOWN.featureTest().evaluate(point));
-    assertThrows(Exception.class, () -> GeometryType.UNKNOWN.featureTest().evaluate(line));
-    assertThrows(Exception.class, () -> GeometryType.UNKNOWN.featureTest().evaluate(poly));
+    assertTrue(GeometryType.UNKNOWN.featureTest().evaluate(point));
+    assertTrue(GeometryType.UNKNOWN.featureTest().evaluate(line));
+    assertTrue(GeometryType.UNKNOWN.featureTest().evaluate(poly));
   }
 
   @ParameterizedTest

planetiler-custommap/README.md

@@ -219,7 +219,10 @@ A feature is a defined set of objects that meet a specified filter criteria.
   of:
   - `point` `line` or `polygon` to pass the original feature through
   - `polygon_centroid` to match on polygons, and emit a point at the center
+  - `line_centroid` to match on lines, and emit a point at the center
+  - `centroid` to match any geometry, and emit a point at the center
   - `polygon_point_on_surface` to match on polygons, and emit an interior point
+  - `point_on_line` to match on lines, and emit a point somewhere along the line
   - `polygon_centroid_if_convex` to match on polygons, and if the polygon is convex emit the centroid, otherwise emit an
     interior point
 - `min_tile_cover_size` - Include objects of a certain geometry size, where 1.0 means "is

planetiler-custommap/planetiler.schema.json

@@ -354,8 +354,11 @@
             "line",
             "polygon",
             "polygon_centroid",
+            "line_centroid",
+            "centroid",
             "polygon_centroid_if_convex",
-            "polygon_point_on_surface"
+            "polygon_point_on_surface",
+            "point_on_line"
           ]
         },
         "source": {

planetiler-custommap/src/main/java/com/onthegomap/planetiler/custommap/configschema/FeatureGeometry.java

@@ -16,10 +16,16 @@ public enum FeatureGeometry {
   POLYGON(GeometryType.POLYGON, FeatureCollector::polygon),
   @JsonProperty("polygon_centroid")
   POLYGON_CENTROID(GeometryType.POLYGON, FeatureCollector::centroid),
+  @JsonProperty("line_centroid")
+  LINE_CENTROID(GeometryType.LINE, FeatureCollector::centroid),
+  @JsonProperty("centroid")
+  CENTROID(GeometryType.UNKNOWN, FeatureCollector::centroid),
   @JsonProperty("polygon_centroid_if_convex")
   POLYGON_CENTROID_IF_CONVEX(GeometryType.POLYGON, FeatureCollector::centroidIfConvex),
   @JsonProperty("polygon_point_on_surface")
-  POLYGON_POINT_ON_SURFACE(GeometryType.POLYGON, FeatureCollector::pointOnSurface);
+  POLYGON_POINT_ON_SURFACE(GeometryType.POLYGON, FeatureCollector::pointOnSurface),
+  @JsonProperty("point_on_line")
+  POINT_ON_LINE(GeometryType.LINE, FeatureCollector::pointOnSurface);
 
   public final GeometryType geometryType;
   public final BiFunction<FeatureCollector, String, FeatureCollector.Feature> geometryFactory;

planetiler-custommap/src/test/java/com/onthegomap/planetiler/custommap/ConfiguredFeatureTest.java

@@ -34,6 +34,7 @@
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.CsvSource;
 import org.junit.jupiter.params.provider.ValueSource;
+import org.locationtech.jts.geom.Puntal;
 
 class ConfiguredFeatureTest {
   private PlanetilerConfig planetilerConfig = PlanetilerConfig.defaults();
@@ -1222,4 +1223,59 @@ void testSchemaPostProcessWithMergePolygons() {
       )
     ), loadConfig(config).findFeatureLayer("testLayer").postProcess());
   }
+
+  @Test
+  void testCentroid() {
+    var config = """
+      sources:
+        osm:
+          type: osm
+          url: geofabrik:rhode-island
+          local_path: data/rhode-island.osm.pbf
+      layers:
+      - id: testLayer
+        features:
+        - source: osm
+          geometry: centroid
+      """;
+    this.planetilerConfig = PlanetilerConfig.from(Arguments.of(Map.of()));
+    testPolygon(config, Map.of(
+      "natural", "water"
+    ), feature -> {
+      assertInstanceOf(Puntal.class, feature.getGeometry());
+    }, 1);
+    testLinestring(config, Map.of(
+      "natural", "water"
+    ), feature -> {
+      assertInstanceOf(Puntal.class, feature.getGeometry());
+    }, 1);
+    testPoint(config, Map.of(
+      "natural", "water"
+    ), feature -> {
+      assertInstanceOf(Puntal.class, feature.getGeometry());
+    }, 1);
+  }
+
+  @ParameterizedTest
+  @ValueSource(strings = {"line_centroid", "point_on_line"})
+  void testLineCentroid(String type) {
+    var config = """
+      sources:
+        osm:
+          type: osm
+          url: geofabrik:rhode-island
+          local_path: data/rhode-island.osm.pbf
+      layers:
+      - id: testLayer
+        features:
+        - source: osm
+          geometry: %s
+      """.formatted(type);
+    this.planetilerConfig = PlanetilerConfig.from(Arguments.of(Map.of()));
+    testLinestring(config, Map.of(
+      "natural", "water"
+    ), feature -> {
+      assertInstanceOf(Puntal.class, feature.getGeometry());
+    }, 1);
+  }
 }