The Bureau of Land Management National Operations Center (NOC) is leading efforts to collect very large scale aerial (VLSA) imagery in support of the agency’s natural resource programs. Using innovative techniques developed by the BLM photogrammetric division at the NOC, the BLM is collecting high-resolution remote sensing data with unmanned aerial systems (UAS).
The Wyoming State BLM is using digital aerial imagery to identify cheatgrass (Bromus tectorum) in a portion of the greater sage-grouse core and connectivity areas in northeastern Wyoming. Cheatgrass degrades sage-grouse habitat mainly by carrying fire through the landscape and incinerating nests, eggs and young.
Warming climate and chronically diminished snowpacks are straining water resources in the western United States. Properly functioning riparian systems slow runoff and store water, thus regulating extreme flows; however, riparian areas across the West are in a degraded condition, including a majority of BLM-managed riparian systems. Symptoms of poorly functioning riparian systems include headcuts, which are the leading edges of channel erosion that result in lost organic soil and water-holding capacity.
The Bureau of Land Management (BLM) leveraged multi-scale imagery to document and measure the impacts of the HX Dam failure in 2014. It is suspected that a 5.2 magnitude earthquake compromised the dam structure on June 28, 2014. In March 2015, the BLM National Operations Center (NOC) partnered with the BLM Arizona State Office and the Safford Field Office to collect high-resolution stereo imagery and derived data products using small unmanned aircraft systems (UAS). Multi-date, pan-sharpened Landsat 8 imagery was processed and analyzed to help identify the likely date of the dam breach.
The existing in-house holdings of BLM Utah State Office vintage aerial photographic film acquired during 1966 for the Utah Photography for Resource Management (UPRM) project (10,300 images) was scanned and orthorectified. The area of interest covers primarily the eastern portion of Utah. The completed product includes the raw, scanned imagery; intermediate processed imagery; final orthoimagery (on a quarter-quad basis), and 11,000 control points, as well as a MrSID compressed mosaic of the full project area.
The BLM National Operations Center (NOC) is using multi-date aerial photography and remotely sensed imagery to delineate recent and historical water cover extents and gradients of the Red River (Texas/Oklahoma) in support of the BLM New Mexico State Office (NMSO).