geocoordinates

A Clojure library for carrying out common calculations on geographical coordinates.

All calculations details can be found in the [Ordnance Survey guide] (https://www.ordnancesurvey.co.uk/docs/support/guide-coordinate-systems-great-britain.pdf). The guide also explains the limitations of this type of datum transformation, in particular related to accuracy.

Available calculations:

convert latitude and longitude to grid eastings and northings for the Ordnance Survey National Grid Transverse Mercator map projection - and vice versa

Installation

The main conversion functions are provided by the geocoordinates.core namespace.

First, require it in the REPL:

(require '[geocoordinates.core :as geo])

Or in your application:

(ns my-app.core
  (:require [geocoordinates.core :as geo]))

To convert from easting and northing to latitude and longitude for the Ordnance Survey National Grid Transverse Mercator map projection:

(geo/easting-northing->latitude-longitude {:easting 651409.903 :northing 313177.27} :national-grid)

To convert from latitude and longitude to easting and northing for the Ordnance Survey National Grid Transverse Mercator map projection:

(geo/latitude-longitude->easting-northing {:latitude 52.65757 :longitude 1.7179215} :national-grid)

To run unit tests:

clj -M:test

To see outdated dependencies

clj -M:outdated

To interactively update outdated dependencies

clj -M:upgrade

To create a jar file:

clj -T:build jar

To install into local maven repository:

clj -T:build install

To upload to clojars:

clj -T:build deploy

To deploy, environment variables CLOJARS_USERNAME and CLOJARS_PASSWORD must be set.

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.