koopjs/winnow

Get WKT and other metadata associated with an Esri/EPSG factory code.

Spatial predicates for GeoJSON.

TypeScript definitions for geojson

Parse, validate, manipulate, and display dates

geohash library for nodejs

Simple Statistics

fast string hashing function

wkt-parser ===

fs-extra contains methods that aren't included in the vanilla Node.js fs package. Such as recursive mkdir, copy, and remove.

Modern native Git hooks

Lint files staged by git

Proxies nodejs require in order to allow overriding dependencies during testing.

JavaScript test spies, stubs and mocks.

JavaScript Standard Style

Formatted TAP output like Mocha's spec reporter

tap-producing test harness for node and browsers

Object schema validation

Convert ArcGIS JSON geometries to GeoJSON geometries and vica-versa.

turf bbox-polygon module

turf centroid module

Use SQL to select and filter javascript data - including relational joins and search in nested objects (JSON). Export to and import from Excel and CSV

Create class breaks and apply colorbrewer palette to output.

Yet another simple Postgres SQL parser/modifier

Proj4js is a JavaScript library to transform point coordinates from one coordinate system to another, including datum transformations.