Open-source alternatives to Geojsontools

Winnow is made for applying sql to geojson in memory. It is useful for working against geojson objects but also has built-in primitives for piping streams.

de9im is a Javascript library that provides spatial predicate functions defined by the Dimensionally Extended Nine-Intersection Model (DE-9IM)de9im-wiki and works with GeoJSONgeojson-site objects. It can test if two geometries have one of the following relationships: contains, coveredby,…

Multiply single type geojsons into a multi type geojson

Extract coordinates from GeoJSON.

Merge multiple GeoJSON files into one FeatureCollection.

Normalize any GeoJSON object into a GeoJSON FeatureCollection.

The GeoJSON specification is picky about winding order.

Generate a plain-english summary of what is in a GeoJSON file.

JavaScript helper functions for manipulating GeoJSON

Apply Ramer–Douglas–Peucker line simplification to GeoJSON features or feature collections in JS or on the CLI.

flatten multipart geometries and geometrycollections in geojson

Join a stream of GeoJSON against a dataset.

Generate random GeoJSON features.

Turf is a JavaScript and TypeScript geospatial analysis library and toolkit used for performing spatial analysis and geometric operations on GeoJSON data. It functions as a modular spatial engine that allows for the generation, manipulation, and classification of geographic datasets within web and node environments. The library provides a set of utility functions to programmatically create structured points, lines, and polygons. It enables the calculation of distances, areas, and geometric relationships between geographic coordinates, supporting both browser-based geospatial analysis and clie

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