The University of Oklahoma has a great Geo Information Systems (GIS) website at http://geo.ou.edu. Free maps available include municipal boundaries, school district boundaries (statewide and by county), county precinct maps, and maps relating to the oil and gas industry. There's also geographical boundary data that you can download and use in your own mapping applications.

Remember me pointing out Savannah's wonderful land use database, called SAGIS, which layers real estate ownership and valuation, aerial photos, zoning districts, and about any other bit of useful geographical information all in one map browser? The GIS department at OU was involved in that project, merging data from city, county, and regional government sources! Wouldn't it be nice if Tulsa would get OU's GIS department to do the same thing for us?