As far as I know, this is a unique system, using Google Maps API plus
their own Geo-pinned Survey maps. Very interesting:
POATRI - poatri.org has just released its new Property Tract Map
system, covering thousands of acres of survey maps in West Texas.
POATRI uses the revolutionary WexZone Mapper software to place their
property maps over a satellite imagery background, giving increased
accuracy to their property owners. The new map system also features
local landmarks such as mountains, roads, gates, and waterways in an
easy-to-use interface.
The property maps consist of survey maps made in the late 70s when the
Land Development Organization was founded. Each tract is labeled with
a number and can be found by using the section and tract numbers in
the drop-down menus at the top of the map interface.
This new map system gives property owners a bird's eye view of their
property and its boundaries in a unique example of a Google Maps
Mashup. Finding your property has never been easier!
For more information on this system please visit:
http://www.poatri.org/tractmaps.html
For more information about WexZone Mapper please visit:
http://www.wexzone.com/mapper.html