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support faster wgs84->merc transforms, a very common reprojection scenario in web mapping - added benefit of this approach is easy clipping for robust handling of out of bounds mercator coords - closes #839
postgis: expose min/max scale controls on datasource to direct when mapnik should pull features by bbox intersection, or the more accurate (and likely to fetch more correct features) approach of Intersection with geometries - addresses part of original problem in #876
support faster wgs84->merc transforms, a very common reprojection scenario in web mapping - added benefit of this approach is easy clipping for robust handling of out of bounds mercator coords - closes #839
See INSTALL file for installation instructions Mapnik is an OpenSource C++/Python toolkit for developing GIS (Geographic Information Systems) applications. At the core is a C++ shared library providing algorithms/patterns for spatial data access and visualization. Essentially a collection of geographic objects (map, layer, datasource, feature, geometry), the library doesn't rely on "windowing systems" and can be deployed in any server environment. It is intended to play fair in a multi-threaded environment and is aimed primarily, but not exclusively, at web-based development. High-level Python bindings (boost.python) facilitate rapid application development, targeting zope3, django etc. Mapnik is a free software and is released under LGPL (GNU Lesser General Public Licence) (see COPYING) For further information see: - http://mapnik.org - http://trac.mapnik.org - http://ohloh.net/p/mapnik
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