We've put together the below resource to help you get started exploring your own data visualised on a map, with options to overlay and compare with external data sets too.
The tools featured will enable you to create point maps from postcode data as well as chloropleth or polygon maps - adding values to geographical boundary shapes to create colour coded heat maps of counts or values. We've included other useful support tools too to help e.g. look up values and source shape files to add to your maps.
Getting Started with Geo Mapping by Superhighways