geojson

Fiona

OSS

Pythonic file I/O for geospatial vector data, wrapping GDAL/OGR.

geo

OSS

Rust crate of geospatial primitives, algorithms and CRS utilities.

geojson-vt

OSS

Slices GeoJSON into vector tiles on the fly in the browser, for rendering without a tile server.

Turf.js

OSS

Advanced geospatial analysis library for browsers and Node.js. Modular and fast.

Alternative to ArcGIS

mapshaper

OSS

Editor for Shapefile, GeoJSON and TopoJSON — simplify, clip and convert in the browser.

Leaflet-Geoman

OSS

Leaflet plugin for drawing, editing, measuring, and managing geometry layers.

Supercluster

OSS

Fast JavaScript library for clustering large GeoJSON point datasets in browsers and Node.js.

Tippecanoe

OSS

Build vector tilesets from large collections of GeoJSON features. Essential for tile generation.

Alternative to Mapbox

Koop

OSS

JavaScript toolkit for serving transformed geospatial data through web mapping APIs.

pygeoapi

OSS

Python server implementation of the OGC API suite for publishing geospatial data.

MapLibre-Geoman

OSS

MapLibre plugin for drawing, measuring, and editing geometry layers in web maps.

Spatial4j

OSS

General purpose geospatial library for Java, a LocationTech project.