I am looking to create a heat map that can track incidents that happen within a building i.e. theft, maintenance issue, violence etc.

I need the picture of the building layout as well as the coloured heat map.

There will be a lot of data as incidents happen so the colour codes need to be big and go through multiple colours i.e. green, yellow, orange and red in various shades.

Someone said this could be done in excel and i have 2003 version.

This has to be relatively easy as i'm not a programmer or that great on excel.

Any help would be appreciated.