Package org.locationtech.jts.coverage

package org.locationtech.jts.coverage
Classes that operate on polygonal coverages.

A polygonal coverage is a set of polygonal geometries which is non-overlapping and edge-matched. (

invalid reference 
Polygon
s or
invalid reference 
MultiPolygon
s). A set of polygonal geometries is a valid coverage if:
  1. Each geometry is valid
  2. The interiors of all polygons are disjoint (they are non-overlapping). This is the case if no polygon has a boundary which intersects the interior of another polygon.
  3. Where polygons are adjacent (i.e. their boundaries intersect), they are edge-matched: the vertices (and thus line segments) of the common boundary section match exactly.
A coverage may contain holes and disjoint regions.

Coverage algorithms (such as CoverageUnion) generally require the input coverage to be valid to produce correct results. Coverages can be validated using CoverageValidator.

  • Classes
    Class
    Description
    CoverageGapFinder
    Finds gaps in a polygonal coverage.
    CoveragePolygonValidator
    Validates that a polygon forms a valid polygonal coverage with the set of polygons adjacent to it.
    CoverageSimplifier
    Simplifies the boundaries of the polygons in a polygonal coverage while preserving the original coverage topology.
    CoverageUnion
    Unions a polygonal coverage in an efficient way.
    CoverageValidator
    Validates a polygonal coverage, and returns the locations of invalid polygon boundary segments if found.