geometry

func AddPointIfNotExist ¶ added in v0.0.10

func AddPointIfNotExist(points []orb.Point, new orb.Point) []orb.Point

AddPointIfNotExist adds 'new' to 'points' unless it is already present.

func DeriveMultiPointFromIds ¶

func DeriveMultiPointFromIds(ctx context.Context, r reader.Reader, ids ...int64) (*geojson.Geometry, error)

DeriveMultiPointFromIds generates a new `geojson.Geometry` MultiPoint instance derived from the (planar) centroids of the geometries associated with 'ids'.

If a feature associated with an ID has a 'MultiPoint' geometry each of those points will be assign to the final geometry (rather than deriving a centroid).

If a feature associated with an ID has either "lbl:" or "geotag:" latitude and longitude properties those will be used in place of a centroid derived from the features geometry.