Go's version of the PROJ.4 projection library

A JavaScript port of the Proj.4 map projection library.

İBB İETT Geojson API

A library that converts GeoTIFFs geokeys to Proj4 string

Proj4dart is a Dart library to transform point coordinates from one coordinate system to another, including datum transformations.

OGC/GIS functions and extensions for Dremio

Proj4 extension for rgeo.

Simple Features Projection Java Library

Projections iOS Library

View popular online maps in Orthographic projection

Coordinate Reference Systems Java Library

Draw an area and export it using ogr2ogr in several formats

坐标系转换，并提供WKT linestring数据格式转换

open-source plugin loading vector tiles for geojson in proj4 coordinates

Web Application for calculating transition parameters from local coordinate systems to WGS84 with geodetic accuracy for geodesy and GIS

Custom projection (LV95) example for Leaflet

Simple Features Projection iOS Library

Grid - a local HTTP server for generating vector tiles (in KML and GeoJSON formats) with various geographic/coordinate grids.

Projections Java Library

Coordinate Reference Systems iOS Library

Common Lisp bindings for the Proj.4 cartographic projections library

Wrapper in Golang for Proj (http://proj4.org) library

A web-app to quickly visualize map projections 🗺📽🌍

A simple helper for re-projecting geojson with Proj4

Alfred Workflow for finding EPSG or name of the Coordinate Systems through epsg.io

coordinate transformation

A Google Apps Script (GAS) powered Openlayers 6 (OL6) Web App making use of the Swisstopo's GeoAdmin REST API and WMTS services

Delphi wrapper for proj4 library (API v4)

Compiles libraries and binaries on Heroku without pain

實作作業系統父與子