Sunday, April 24, 2011

Multivariate Map - Australia

http://webhelp.esri.com/arcgiSDEsktop/9.2/index.cfm?TopicName=Drawing_features_to_show_multiple_attributes
Multivariate maps are interesting because they can combine multiple map techniques into one.  For example, the map above is of Australia and depicts the ecoregions and the ecoregion disturbance level.  The ecoregions are depicted through the classed choropleth map and the disturbance level is shown through a proportional circle map.  Through this map we can see that the areas along the coast are the most disturbed and classified as "critical."  This area also coincides with the Montana grassland habitat type.

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