From f2682ab8c90be155031b46775475499b921143c0 Mon Sep 17 00:00:00 2001 From: Kristian Evers Date: Wed, 27 Jun 2018 14:43:23 +0200 Subject: Add better description to website frontpage --- docs/source/index.rst | 30 ++++++++++++++++++++++++++---- 1 file changed, 26 insertions(+), 4 deletions(-) (limited to 'docs/source') diff --git a/docs/source/index.rst b/docs/source/index.rst index 3e829274..d09424c8 100644 --- a/docs/source/index.rst +++ b/docs/source/index.rst @@ -24,7 +24,29 @@ PROJ .. only:: html - PROJ is a standard UNIX filter function which converts geographic longitude - and latitude coordinates into cartesian coordinates (and vice versa), and it is - a C API for software developers to include coordinate transformation in their - own software. PROJ is maintained on `GitHub `_. + PROJ is a generic coordinate transformation software, that transforms geospatial + coordinates from one coordinate reference system (CRS) to another. This + includes cartographic projections as well as geodetic transformations. + + PROJ includes :ref:`command line applications` for easy conversion of + coordinates from text files or directly from user input. In addition to the + command line utilities PROJ also exposes an + :ref:`application programming interface`, or API in short. The API + let developers use the functionality of PROJ in their own software without having + to implement similar functionality themselves. + + PROJ started purely as a cartography application letting users convert geodetic + coordinates into projected coordinates using a number of different cartographic + projections. Over the years, as the need has become apparent, support for datum + shifts has slowly worked it's way into PROJ as well. Today PROJ support more + than a hundred different map projections and can transform coordinates between + datums using all but the most obscure geodetic techniques. + + You can download the source code for PROJ on the :ref:`download section` + and find links to prepackaged executables in the + :ref:`installation section`. + + In addition to this website the PROJ documentation is also available in `PDF`_ + form. + +.. _`PDF`: https://raw.githubusercontent.com/OSGeo/proj.4/gh-pages/proj.pdf -- cgit v1.2.3