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drola/coordinate-transformation-library
=======================================

Transform coordinates between swedish RT90, SWEREF99 and WGS8

110.9k↓50%2PHP

Since Oct 4Pushed 3y ago1 watchersCompare

[ Source](https://github.com/drola/coordinate-transformation-library)[ Packagist](https://packagist.org/packages/drola/coordinate-transformation-library)[ RSS](/packages/drola-coordinate-transformation-library/feed)WikiDiscussions master Synced 1mo ago

READMEChangelogDependenciesVersions (1)Used By (0)

Coordinate Transformation Library
=================================

[](#coordinate-transformation-library)

This library is a fork of  and converted to a Composer package.

Installation
------------

[](#installation)

```
composer require drola/coordinate-transformation-library

```

For usage examples take a look at the unit tests in `tests/` folder.

Original README
---------------

[](#original-readme)

```
CoordinateTransformationLibrary - David Gustafsson 2012

RT90, SWEREF99 and WGS84 coordinate transformation library

This library is a PHP port of the .NET library by Björn Sållarp.
calculations are based entirely on the excellent
javscript library by Arnold Andreassons.

Source: http://www.lantmateriet.se/geodesi/
Source: Arnold Andreasson, 2007. http://mellifica.se/konsult
Source: Björn Sållarp. 2009. http://blog.sallarp.com
Source: Mathias Åhsberg, 2009. http://github.com/goober/
Author: David Gustafsson, 2012. http://github.com/david-xelera/

License: http://creativecommons.org/licenses/by-nc-sa/3.0/

```

###  Health Score

22

—

LowBetter than 23% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity26

Limited adoption so far

Community11

Small or concentrated contributor base

Maturity24

Early-stage or recently created project

 Bus Factor1

Top contributor holds 68.2% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

### Community

Maintainers

![](https://avatars.githubusercontent.com/u/1074328?v=4)[Matjaž Drolc](/maintainers/drola)[@drola](https://github.com/drola)

---

Top Contributors

[![drola](https://avatars.githubusercontent.com/u/1074328?v=4)](https://github.com/drola "drola (15 commits)")[![goober](https://avatars.githubusercontent.com/u/124244?v=4)](https://github.com/goober "goober (7 commits)")

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