geometryCollection abstract method

void geometryCollection(WriteGeometries geometries, { int? count, String? name, Iterable<double>? bounds, })

Writes a geometry collection from the content provided by geometries.

An optional expected count, when given, specifies the number of geometry objects in a collection. Note that when given the count MUST be exact.

Use an optional name to specify a name for a geometry (when applicable).

An optional bounds can used set a minimum bounding box for a geometry written. A writer implementation may use it or ignore it. Supported coordinate value combinations by coordinate type:

Type	Expected values
xy	minX, minY, maxX, maxY
xyz	minX, minY, minZ, maxX, maxY, maxZ
xym	minX, minY, minM, maxX, maxY, maxM
xyzm	minX, minY, minZ, minM, maxX, maxY, maxZ, maxM

An example to write a geometry collection with two child geometries:

  content.geometryCollection(
      type: Coords.xy
      count: 2,
      (geom) => geom
        ..point([10.123, 20.25])
        ..polygon(
          [
             [
                10.1, 10.1,
                5.0, 9.0,
                12.0, 4.0,
                10.1, 10.1,
             ],
          ],
          type: Coords.xy,
        ),
    );

Implementation

void geometryCollection(
  WriteGeometries geometries, {
  int? count,
  String? name,
  Iterable<double>? bounds,
});