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NPS | 2021
The Yukon River basin encompasses 832,000 square-kilometers and is one of Earth's largest boreal-Arctic rivers. Characterized by a long, frozen winter season, the river demonstrates an abrupt…
NPS | 2021
Twenty years ago, ecological studies were often limited by the number of times biologists could find (relocate) their study animals. With the advent and now widespread use of Global Positioning…
NPS | 2021
The snow season has become shorter and the growing season longer over the past 20 years in Alaska's Arctic National Parks. The NPS Arctic Inventory and Monitoring Network (ARCN) uses MODIS (Moderate…
BLM | 2021
Landslides are a major geologic hazard in Oregon. Landslide inventory mapping helps resource managers understand the spatial pattern of existing landslides and provides information to…
BLM | 2021
Coastal erosion, exacerbated by sea-level rise, threatens both infrastructure and natural areas around the world. The King Range National Conservation Area (NCA) is vulnerable to such erosion effects…
BLM | 2021
The emergent proliferation of Synthetic Aperture Radar (SAR) imaging systems, related advancements in image processing and exploitation capabilities, and the increasing availability of analysis-ready…
BLM | 2021
Public lands across the West contain myriad Native American cultural sites that often include surficial stone features such as rings, alignments, and cairns. In 2018, BLM archaeologists from Wyoming’…
BLM | 2021
The invasion of exotic annual grasses is a widespread problem across the western United States. Of particular concern is cheatgrass (Bromus tectorum), which produces continuous mats of fine, highly…
BLM | 2011
Lidar and aerial photography are valuable tools for preliminary investigations by cadastral surveyors. Boundary disputes are often decided using survey information. Remote sensing data…
NPS | 2011
The Alaska Land Resources Program Center uses orthoimagery available from the Alaska Region's GIS site. Prior to good high-resolution digital orthoimagery, the location of many parcels were drawn…
NPS | 2011
Many parks depend on surveying for activities ranging from locating boundaries and cultural resources to monitoring geomorphological change. Assateague Island National Seashore and Cape Cod…
NPS | 2011
In recent years, the retreat of Exit Glacier has kept Kenai Fjords National Park’s trail crews busy extending trails as they strive to maintain safe visitor access to the edge of the glacier. …