[OpenLayers-Users] Coloring feateres? Where to start...

[Jeff Dege]

We're considering a new application that will use maps in a way that is
new to us, and I was hoping people here might tell me where to start.

Basically, it's using a map to help visualize a set of data, collected
by region, area, whatever.

For the sake of example, let's assume we're working on counties.
Suppose we have a set of data that is changing continually, that is
being rolled by by county every ten minutes.  (The underlying database
changes constantly, but we're running a process every ten minutes that
creates a summary dataset, grouped by county.)

We want to display a map that shows all the counties, color-coded
according to one of the values in the data set, and if the user selects
a county, we want to display the rest of the values for that county in a
div or a popup.

Any ideas as to where to start?