zongsizhang commented on code in PR #764:
URL: https://github.com/apache/sedona/pull/764#discussion_r1104396437
##########
common/src/main/java/org/apache/sedona/common/Functions.java:
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@@ -543,4 +542,25 @@ public static Geometry split(Geometry input, Geometry
blade) {
// check input geometry
return new GeometrySplitter(GEOMETRY_FACTORY).split(input, blade);
}
+
+
+ /**
+ * get the coordinates of a geometry and transform to Google s2 cell id
+ * @param input Geometry
+ * @param level integer, minimum level of cells covering the geometry
+ * @return List of coordinates
+ */
+ public static Long[] s2CellIDs(Geometry input, int level) {
+ HashSet<S2CellId> cellIds = new HashSet<>();
+ List<Geometry> geoms = GeomUtils.extractGeometryCollection(input);
+ for (Geometry geom : geoms) {
+ try {
+
cellIds.addAll(S2Utils.s2RegionToCellIDs(S2Utils.toS2Region(geom), 1, level,
Integer.MAX_VALUE - 1));
Review Comment:
they are all supported already. MultiPoint, MultiPolygon, MultiLineString
are GeometryCollection, after extraction they become points, polygons and
linestrings.
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