PHPackages                             helsingborg-stad/coordinate-transformation-library - PHPackages - PHPackages  [Skip to content](#main-content)[PHPackages](/)[Directory](/)[Categories](/categories)[Trending](/trending)[Leaderboard](/leaderboard)[Changelog](/changelog)[Analyze](/analyze)[Collections](/collections)[Log in](/login)[Sign up](/register)

1. [Directory](/)
2. /
3. [Utility & Helpers](/categories/utility)
4. /
5. helsingborg-stad/coordinate-transformation-library

ActiveLibrary[Utility & Helpers](/categories/utility)

helsingborg-stad/coordinate-transformation-library
==================================================

Transform coordinates between swedish RT90, SWEREF99 and WGS8

1.0.1(9y ago)02.9k↓39.5%3CC BY-NC-SA 3.0PHPPHP >=5.3.0

Since Oct 10Pushed 9y ago3 watchersCompare

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

READMEChangelog (2)Dependencies (1)Versions (3)Used By (3)

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

32

—

LowBetter than 72% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity21

Limited adoption so far

Community18

Small or concentrated contributor base

Maturity59

Maturing project, gaining track record

 Bus Factor1

Top contributor holds 61.9% 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.

###  Release Activity

Cadence

Every ~218 days

Total

2

Last Release

3290d ago

### Community

Maintainers

![](https://www.gravatar.com/avatar/f46fe64973c3e89d15c745c0bf601c25983bafea81d30e64d4bf813a6f8c8c7c?d=identicon)[sebastianthulin](/maintainers/sebastianthulin)

---

Top Contributors

[![drola](https://avatars.githubusercontent.com/u/1074328?v=4)](https://github.com/drola "drola (13 commits)")[![goober](https://avatars.githubusercontent.com/u/124244?v=4)](https://github.com/goober "goober (7 commits)")[![Svanmark](https://avatars.githubusercontent.com/u/457482?v=4)](https://github.com/Svanmark "Svanmark (1 commits)")

###  Code Quality

TestsPHPUnit

### Embed Badge

![Health badge](/badges/helsingborg-stad-coordinate-transformation-library/health.svg)

```
[![Health](https://phpackages.com/badges/helsingborg-stad-coordinate-transformation-library/health.svg)](https://phpackages.com/packages/helsingborg-stad-coordinate-transformation-library)
```

###  Alternatives

[kartik-v/bootstrap-popover-x

Bootstrap Popover Extended - Popover with modal behavior, styling enhancements and more.

1143.4M3](/packages/kartik-v-bootstrap-popover-x)[laminas/laminas-component-installer

Composer plugin for injecting modules and configuration providers into application configuration

294.1M95](/packages/laminas-laminas-component-installer)

PHPackages © 2026

[Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)