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Understanding Mapnik

A Mapnik tutorial

• Contents

Starting with Python

• Setting a background colour
• Plotting points
• Placing images at points
• Plotting lines
• Specifying line colour and width
• Specifying line styles
• Using layers to draw points and lines
• Using filters to represent data
• Adding text to the map

Using XML and CSS

• Representing map designs in XML
• Revisiting our examples in XML
• CSS styling with Cascadenik

CartoCSS and PostGIS

• Using CartoCSS
• Specifying the drawing order
• Using PostgreSQL and PostGIS
• Specifying geometry types
• The Google Maps projection
• Specifying geometry constraints