thematic
mapping
.org
Thematic Mapping API
Create KML based thematic maps
with a few lines of JavaScript
›› More details
Home
API
Introduction
Documentation
Examples
Forum
Engine
Techniques
Playground
Downloads
Blog
About
Home
Playground
OpenLayers
Proportional symbols
Contents
Introduction
OpenLayers
Choropleth (GeoJSON)
Choropleth (KML)
Proportional symbols
Pie charts map
Map tiles
Map projections
Thematic Mapping with OpenLayers
Proportional symbols from GeoJSON
Population, 2005
Population numbers from
UNdata
Blog:
Proportional symbol mapping with OpenLayers
Javscript:
openlayers_propsymbols_geojson.js
Data:
population_2005_symbols.json