3.2.3. Other data sources
The following data source plugins are not really part of the Mapnik project, even though some of them have their github repostitory under the mapnik project.
Hello World
The Hello World plugin is an example of the minimal code needed to implement an input plugin. It only ever returns a single point geometry located in the middle of the current map extent, with a single attribite named key and a constant value of hello world!.