76329028d2
Create a group_symbolizer_helper for group placments, and extract some code from text_symbolizer_helper into a base class to share with group_symbolizer_helper. Also, move tolerance_iterator into its own header file. Use helper in process_group_symbolizer to find placement positions.
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What is Mapnik?
Mapnik is an open source toolkit for developing mapping applications. At the core is a C++ shared library providing algorithms and patterns for spatial data access and visualization. High-level bindings for JavaScript, Python, and Ruby facilitate rapid application development in a variety of environments.
Overview
Mapnik is basically a collection of geographic objects like maps, layers, datasources, features, and geometries. The library doesn't rely on any OS specific "windowing systems" and it can be deployed to 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.
For further information see http://mapnik.org and also our wiki documentation here on GitHub.
Installation
See INSTALL.md for installation instructions and the Install page on the wiki for guides.
License
Mapnik software is free and is released under the LGPL (GNU Lesser General Public License). Please see COPYING for more information.