Overview
The @loaders.gl/wkt module handles the Well Known Text (WKT) format, an ASCII format that defines geospatial geometries; and the Well Known Binary format, WKT's binary equivalent.
Installation
npm install @loaders.gl/wkt
npm install @loaders.gl/core
Loaders and Writers
| Loader |
|---|
WKBLoader |
WKBWriter |
WKTLoader |
WKTWriter |
Format Notes
A number of variants of WKT and WKB exist
| Format | Support | Description |
|---|---|---|
| WKT | Y | Text representation |
| WKB | Y | Binary representation |
| EWKT | N | WKT that starts with a spatial reference id (SRID) |
| TWKB | N | WKB variant that uses varints, precision truncation and zigzag point encoding to reduce uncompressed binary size ~2x (compressed size reduction is less). |
Attribution
The WKTLoader is based on a fork of the Mapbox wellknown module under the ISC license (MIT/BSD 2-clause equivalent).
The WKBLoader and WKBWriter are forked from https://github.com/cschwarz/wkx under MIT license, Copyright (c) 2013 Christian Schwarz.