Difference between revisions of "OSGeo Cartographic Engine"

Revision as of 00:50, 7 April 2008

Motivation

There are plans about new cartographic tools (map composer) for QGIS, as well as for GRASS. We suggest to develop a joint library for the various functions which could be shared across GRASS, QGIS and other projects with bindings to Qt, Python etc. The GUI part will be done within the individual software projects.

Functionality

Shared functions may include

break for classes (various algorithms)
histogram analysis
color ramps
RGB and possibly CYMK support (aka color transformations) etc.
Algorithms for intelligent label placement
Symbology management

Programming Language

C? C++?

Existing code to be recycled

There will be code in GRASS, QGIS, the Python Cartographic Library (http://zcologia.org/cartography) and other sources which could be integrated (check license compatibility).

Label placement code:
- Mapserver labeling code (MapServer License, C language)
- GRASS v.label.sa (GPL, C language)
Color management:
- MapGuide, CalculateDistribution and Color (LGPL.C++)
Stylization:

License

It is proposed to license the OSGeo Cartographic Library under LGPL. The license needs to be GPL compliant.

Interested people

Markus Neteler (proposer)
Horst Düster
Martin Landa
Marco Hugentobler
Frank Warmerdam

@@ Line 23: / Line 23: @@
 * Label placement code:
-** Mapserver code
+** Mapserver [http://trac.osgeo.org/mapserver/browser/trunk/mapserver/maplabel.c labeling code] (MapServer License, C language)
-** GRASS [http://trac.osgeo.org/grass/browser/grass/trunk/vector/v.label.sa v.label.sa]
+** GRASS [http://trac.osgeo.org/grass/browser/grass/trunk/vector/v.label.sa v.label.sa] (GPL, C language)
+* Color management:
+** MapGuide, [http://trac.osgeo.org/mapguide/browser/trunk/MgDev/Server/src/Services/Feature/FeatureNumericFunctions.cpp CalculateDistribution] and [http://trac.osgeo.org/mapguide/browser/trunk/MgDev/Common/PlatformBase/Data/Color.cpp Color] (LGPL.C++)
+* Stylization:
 == License ==