feat: support multi feature for geojson (#380)

reearth · Dec 19, 2022 · d1ee59b · d1ee59b
1 parent 67bc52a
commit d1ee59b
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Showing 2 changed files with 43 additions and 2 deletions.
diff --git a/src/core/mantle/data/geojson.ts b/src/core/mantle/data/geojson.ts
@@ -16,6 +16,40 @@ export function processGeoJSON(geojson: GeoJSON, range?: DataRange): Feature[] {
 
   if (geojson.type === "Feature") {
     const geo = geojson.geometry;
+    if (geo.type === "MultiPoint") {
+      return geo.coordinates.flatMap(coord => {
+        return processGeoJSON({
+          ...geojson,
+          geometry: {
+            type: "Point",
+            coordinates: coord,
+          },
+        });
+      });
+    }
+    if (geo.type === "MultiLineString") {
+      return geo.coordinates.flatMap(coord => {
+        return processGeoJSON({
+          ...geojson,
+          geometry: {
+            type: "LineString",
+            coordinates: coord,
+          },
+        });
+      });
+    }
+    if (geo.type === "MultiPolygon") {
+      return geo.coordinates.flatMap(coord => {
+        return processGeoJSON({
+          ...geojson,
+          geometry: {
+            type: "Polygon",
+            coordinates: coord,
+          },
+        });
+      });
+    }
+
     return [
       {
         id: (geojson.id && String(geojson.id)) || generateRandomString(12),

diff --git a/src/core/mantle/types/index.ts b/src/core/mantle/types/index.ts
@@ -1,4 +1,11 @@
-import type { LineString, Point, Polygon } from "geojson";
+import type {
+  LineString,
+  Point,
+  Polygon,
+  MultiPoint,
+  MultiLineString,
+  MultiPolygon,
+} from "geojson";
 
 import type { Infobox, Block, Tag } from "../compat/types";
 
@@ -71,7 +78,7 @@ export type Feature = {
   range?: DataRange;
 };
 
-export type Geometry = Point | LineString | Polygon;
+export type Geometry = Point | LineString | Polygon | MultiPoint | MultiLineString | MultiPolygon;
 
 export type ComputedLayerStatus = "fetching" | "ready";