vector_data library

Data structures for geometries, geometry collections, features and feature collections.

Key features:

simple geometries (point, line string, polygon, multi point, multi line string, multi polygon) and geometry collections
features (with id, properties and geometry) and feature collections

This libary exports a subset of package:geobase/geobase.dart.

Usage: import package:geobase/vector_data.dart

Classes

CoordRefSys: Metadata about a coordinate reference system (CRS) identified and specified by id.
Feature<T extends Geometry>: A feature is a geospatial entity with id, properties and geometry.
FeatureBuilder<T extends FeatureObject, E extends Geometry>: A builder to create geospatial feature objects of T from FeatureContent.
FeatureCollection<E extends Feature<Geometry>>: A feature collection contains an array of Feature items.
FeatureObject: A common base interface for geospatial feature objects (Feature and FeatureCollection).
Geometry: A base interface for geometry classes.
GeometryBuilder<T extends Geometry, E extends Geometry>: A builder to create geometry objects of T from GeometryContent.
GeometryCollection<E extends Geometry>: A geometry collection with geometries.
LineString: A line string geometry with a chain of positions.
MultiLineString: A multi line string with an array of line strings (each with a chain of positions).
MultiPoint: A multi point geometry with an array of points (each with a position).
MultiPolygon: A multi polygon with an array of polygons (each with an array of rings).
Point: A point geometry with a position.
Polygon: A polygon geometry with one exterior and 0 to N interior rings.
SimpleGeometry: A base interface for "simple" geometry classes.

Coords: An enum for coordinate types (by spatial dimension and whether is measured).
Dimensionality: An enum for dimensionality or topological dimension in the context of geospatial applications.
Geom: An enum for geometry types.

AddGeometry<T extends Geometry> = void Function(T geometry, {String? name}): A function to add geometry to some collection with an optional name.