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Updated MapDesign (markdown)

thangalin 2012-07-17 17:01:15 -07:00
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MapDesign.md

@ -18,7 +18,7 @@ The basic Mapnik object is the Map. Other important objects include _Layers, Fil
Mapnik users typically only deal with Map Layers, Filters, Rules, and Symbolizers. Whereas Filters and Rules serve as predicates that determine _when_ geometric features are displayed, Mapnik Symbolizers take input data and turn them into graphical form, whether as Points, Lines, Polygons, Raster Images, or Textual Labels.
For more information on Symbolizers, Filters, and Rules, see SymbologySupport.
For more information on Symbolizers, Filters, and Rules, see [[SymbologySupport]].
Internally, a mapnik Map object may have multiple Layers, where each Layer should have a reference to a Datasource (mapnik::datasource_ptr). A typical Datasource (for example, a Shapefile Datasource, an in-memory Datasource, or a Raster Datasource) has multiple features.