Open Database License

See the following -

An Open Source Mapping Primer

As you've surfed the web, you've surely come across many sites using embedded maps to display data. Humans are visual creatures, so presenting temperatures, crime statistics, or population densities on a map often makes quickly discerning patterns and spatial relationships easier than presenting the same facts as a boring table. Visualizations based on maps can be quite sophisticated and even show patterns across time as well as space; Maps Mania is one blog showcasing many great examples of online maps. But displaying data on an embedded map doesn't need to be a complicated affair. You can do it using open source tools. In this post, I offer some tips for getting started doing this...

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