v1.20.0.0 — Kotlin Multiplatform port of JTS 1.20.0

1.20.0.0 — 2026-07-17

First public release: a faithful Kotlin Multiplatform port of
JTS 1.20.0, published to Maven Central under group
de.mpmediasoft.kts. Source package names are unchanged (org.locationtech.jts.*).

Added

• Multiplatform artifacts for JVM (Java 8+), JS (Node/browser), Wasm/JS, and
  Kotlin/Native (macOS, iOS, Linux, Windows).
• Modular, à-la-carte packaging:
  • kts-core — geometry model, spatial predicates, overlay, buffer, algorithms, and the WKT/WKB writers.
  • kts-io-wkt — WKTReader, WKBReader, WKBWriter.
  • kts-io-gml — GMLReader, GMLWriter.
  • kts-io-kml — KMLReader, KMLWriter.
  • kts-io-geojson — GeoJsonReader, GeoJsonWriter (kotlinx-serialization).
  • kts-io-files — WKTFileReader, WKBHexFileReader (kotlinx-io).
• An extension-property layer restoring the Kotlin .property idiom on top of JTS's Java getters.

Changed (deviations from upstream JTS)

• IO readers and the GML/KML/file IO are split out of kts-core into the à-la-carte kts-io-*
  modules; the WKT/WKB writers remain in kts-core.
• GeoJSON is built on kotlinx-serialization-json instead of the JVM-only org.json.simple.
• Stream-based (java.io) IO is provided as JVM-only extension functions; the common API works on
  String/ByteArray.
• GML: GMLHandler is no longer a SAX DefaultHandler, and GMLReader.read throws ParseException
  instead of SAXException/ParserConfigurationException.

Removed

• java.io.Serializable / serialVersionUID (use WKT/WKB for persistence).
• Cloneable / clone() from the multiplatform surface (use the runtime-type-preserving copy()).
• The JVM-desktop-only org.locationtech.jts.awt package and internal dev/debug helpers.
• The jts.overlay / jts.relate system-property switches.

See doc/kotlin/KOTLIN-MP-COMPATIBILITY.md for the complete,
itemised list of API deviations and the rationale for each.