"OpenOffice.org's Calc isn't only about rows and columns. If you
look long enough at the empty spreadsheet, you will soon realise
that it looks like a map grid, and, indeed, with a bit of
imagination you can use Calc to create a simple yet handy mapping
application. This how-to guides you through building a Calc-n-map
-- an application for marking points of interest on a city map.
"First of all you'll need to find a map in any Calc-supported
graphics format. The easiest way to get a map is to use a dedicated
Web site like Maporama, which features an easy-to-use interface and
numerous options and map styles. Find the map you want to use and
save it to your hard disk by right-clicking on the map and choosing
the Save Image As... option (in Mozilla Firefox)..."