Michael A. Peters wrote:
Basically - the data will be plotted as a grid of regular hexagons. When locality information (museum record or photo voucher record in our own database) exists, the hexagon the record sits in gets drawn a pretty color (depending on type and age of records).
mashup's with google maps are easy to do, and there are plenty of examples and resources out there that let you work with them in most mainstream languages - I am sure php code exists too.
Is that a route you considered ?
- KB