v0.11.0

2020-04-05

• Adds a new package github.com/peterstace/simplefeatures/geos that wraps the GEOS library. The following functions are wrapped: Equals, Disjoint, Touches, Contains, Covers, Intersects, Within, CoveredBy, Crosses, Overlaps, Union, Intersection, and Buffer.

v0.10.1

2020-03-24

• Adds documentation comments to all exported symbols.

v0.10.0

2020-03-20

• Adds support to geometries for Z (3D) and M (Measure) values. This includes many breaking changes, primarily around geometry constructor functions.

v0.9.0

2020-03-03

Special thanks to Frank Sun and Peter Jones for contributing to this release.

• Fixes a bug in the intersects predicate between MultiLineString and MultiPolygon.

• Removes the EmptySet type. The Point, LineString, and Polygon types can now represent empty geometries.

• Adds the GeometryType method, which returns a string representation of the geometry type (e.g. returns "LineString" for the LineString geometries).

• Adds support to store empty Point geometries within MultiPoint geometries.

• Simplifies geometry constructor options by removing the DisableExpensiveValidations option.

• Removes the Equals predicate (which was only implemented for a small proportion of geometry type pairs).

• Modifies the TransformXY methods to return their own concrete geometry type.

v0.8.0

2020-02-20

Special thanks to Lachlan Patrick for contributing to this release.

• Adds a Length implementation for the Geometry type.

• Modifies the Boundary for concrete geometry types to return a concrete geometry type (rather than the generic Geometry type).

• Modifies the Fuzz Tests to use batching.

• Fixes a bug in the IsSimple method for MultiLineString.

• Adds Centroid implementations for all geometry types.

• Adds a new suite of reference implementation tests using libgeos.

v0.7.0

2020-01-24

• Fixes a deficiency where LineString would not retain coincident adjacent points.

• Adds two new methods to LineString. NumLines gives the number of Line segments making up the LineString, and LineN allows access to those Line segments.

• Reduces the memory required to store a LineString.

v0.6.0

2020-01-21

Special thanks to Lachlan Patrick for contributing to this release.

• Adds Reverse methods, which reverses the order of each geometry's control points.

• Adds SignedArea methods, which calculate the signed area of geometries. The signed area takes into consideration winding order, and produces either a negative or positive result for non-empty areal geometries.

v0.5.0

2020-01-17

• Fixes a bug where polygons with nested rings would erroneously be reported as valid.

• Performance improvements have been made to Polygon and MultiPolygon validation. The algorithms used now have sub-quadratic time complexity, and memory allocations have been significantly reduced.

v0.4.0

2020-01-07

• The Geometry interface has been replaced with a concrete type also named Geometry. This new type holds exactly one geometry value (one of EmptySet, Point, Line, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, GeometryCollection. The AnyGeometry type has been removed (Geometry can be used instead).

v0.3.0

2020-01-07

• A Linesweep algorithm is now used for the Intersects() bool implementation between line types (Line, LineString, MultiLineString). This reduces the computational complexity from quadratic time to linearithmic time.