Building a Geographic Information System
نویسنده
چکیده
In an effort to assist the cultural resource management (CRM) activities of the Texas Department of Transportation (TxDOT), a geographic information system (GIS) database was developed to locate historic resources. The area selected for the project was TxDOT’s Houston District. Maps dating from 1871 to 1952 were georeferenced, historic resources identified, locations digitized and information pertaining to the structures and map sources added to the database. The greatest challenge of the project was accurately georeferencing maps that predate the adoption of the North American Datum of 1927. To deal with this issue, customized datum transformations were developed to transform maps into a modern coordinate system. Several quality control measures were also used to assess the accuracy of the generated GIS data including the use of root mean square error (RMSE) for positional accuracy.
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تاریخ انتشار 2003