


How Lands and Realty can use RS, GIS, GeoSpatial Technology and Photogrammetry
Much of the defining of land realty is moving towards geo-spatial technology in the legal definition of metes and bounds from the Cadastral Survey being input into GIS software which can geo-reference this data for a variety of applications. An active example of this technology can be found on-line on a site called GeoCommunicator. Here BLM manages an active publication site for searching, accessing, and dyamic mapping of data for federal land stewardship, land and mineral use records, and land survey information. This site can be found at: http://www.geocommunicator.gov/GeoComm/index.shtm.
The applications for land realty for geo-spatial sciences are endless. Visit the BLM’s web site under “what we do” for Land, Realty, and Cadastral Survey at: http://www.blm.gov/nhp/what/lands/realty/index.html. There you find a variety of information and applications of how the Bureau
The most important aspect of lands and realty is the accuracy in positioning or mapping of the public lands as well as end use of applying these geo-spatial lands to an abundance of resource applications. Much of the Bureau’s resource management is firmly dependent on knowing the spatial location of public lands to perform analysis, assessment, monitoring, planning, etc. GIS is a critical factor in performing this analysis. Photogrammetry comes into play in precisely, and legally, relating where these ownership parcels are located relative to features on the ground. Many of the land ownership definitions are defined by natural features on the ground, vice versa, the land features on the ground impact the location of the parcels. These natural features are dynamic, and the ever changing earth must be photographed and reviewed with precision technology to measure the precise ownership or political boundary and it’s relationship to the changing features on the ground. Photogrammetry is required to accurately define these boundaries.
Remote sensing is primarily used for monitoring and assessment of public lands to determine the “health” of the public lands to serve planning, monitoring, assessment, and other resource management requirements. The combination of photogrammetry to provide accurate and legal descriptions of the public land parcels relative to other agency and private lands is but one ingredient use in GeoSpatial technologies. Combining other GIS data, can provide analysis and assessment of data that photogrammetry has provided. Remote sensing adds the relative time factor to the analysis in recording the state of the resources on the ground both from the past to the present. All three technologies, photogrammetry, remote sensing, and GIS work hand in hand to provide the monitoring and analysis to assist BLM in managing the resources on the public lands.
