Open EVA. CONUS land cover and impervious products have now been released. This release includes eight epochs of land cover , , , , , , , and , a — land cover change index, and sixteen urban imperviousness datasets - a percent imperviousness and classified imperviousness matching all years of land cover. The NLCD and products for tree canopy cover will be released in the next year. RCMAP rangeland fractional component data including a time-series, projections of future component cover through the s, and Ecological Potential component cover are also currently available.
Developed, Open Space - areas with a mixture of some constructed materials, but mostly vegetation in the form of lawn grasses. Cheatgrass Bromus tectorum is a dominant species but this dataset also includes Bromus arvensis L.
Hordeaceus, Bromus japonicus, Bromus madritensis L. Duvin, Bromus racemosus, Bromus rubens L. A main objective of releasing these maps is to provide a tool for better monitoring EAG dynamics and informing conservation and management efforts at local to regional scales.
These data contain percent tree canopy estimates, as a continuous variable, for each pixel across all land covers and types and are generated by the United States Forest Service USFS. The USFS derives tree canopy cover from multi-spectral Landsat imagery and other available ground and ancillary information. RCMAP base component products characterize the percentage of each meter pixel in the Western United States covered by shrub, herbaceous, bare ground, litter, sagebrush, big sagebrush and annual herbaceous, along with estimating shrub height and sagebrush height.
Component products are designed to be used individually or combined to support a broad variety of applications. Please note these new Revised rangeland products will differ from the first generation of circa fractional cover maps, a more aggressive masking of tree canopy cover was applied to each rangeland component.
And, for the secondary components sagebrush, big sagebrush, sagebrush height and shrub height we reconciled to the primary component shrub , excluding any pinyon-juniper woodlands. The RCMAP product suite consists of eight fractional components: annual herbaceous, bare ground, herbaceous, litter, non-sagebrush shrub, perennial herbaceous, sagebrush and shrub, rule-based error maps, and the temporal trends of each. Data characterize the percentage of each meter pixel in the Western United States covered by each component for each year from - providing change information for 35 years imagery for was unavailable.
Because of file size limitations, individual component products are packaged in three historic intervals including , , and Survey Manual. The Topographic Maps and geographical information system GIS data provided in The National Map are pre-generated into downloadable products often available in multiple formats.
Lidar point cloud data is also available over many areas of the US. See our Dataset List for a brief explanation of these products. Direct access is provided via browsable links through our Amazon's Cloud Browse site. NLCD's impervious surface descriptor product identifies types of roads, core urban areas, and energy production sites for each impervious pixel to allow deeper analysis of developed features.
NLCD also includes a wind energy layer across all impervious products. Click here for a podcast on NLCD Tap the tabs above to explore related science, multimedia, and news on NLCD. In this episode, we learn about the latest land cover release from EROS.
In this episode, we hear how Landsat helps monitor vulnerable rangelands in the Western U. In this episode, we talk about the National Land Cover Database. NLCD supports a wide variety of Federal, State, local, and nongovernmental applications that seek to assess ecosystem status and health, understand the spatial patterns of biodiversity, predict effects of climate change, and develop land management policy Quantifying Western U.
Nine shrubland ecosystem components, including percent shrub, sagebrush Artemisia. The need to monitor change in sagebrush steppe is urgent due to the increasing impacts of climate change, shifting fire regimes, and management practices on ecosystem health. Remote sensing provides a cost-effective and reliable method for monitoring change through time and attributing changes to drivers.
We report an automated method of mapping rangeland fractional component cover over a lar The Alaska National Land Cover Database was created using change detection between the nominal dates of and utilizing Google Earth engine composites of Landsat imagery. Traditionally, previous classifications of Alaska used path row data and spectral comparisons between path rows along with ancillary data to derive areas of change. Alaska has many challenges for land cover In this update the landcover footprint was extended along the northern coast to include the islands that were missed in previous versions, and several duplicate roads offset by 1 or 2 pixels were removed on the Aleutian Islands.
It sorts the each bymeter plot of land in the United States into a land cover class, such as cropland, pasture, high-intensity developed, deciduous forest, and the like. It also includes information on. The extensive rangelands across the Western United States are threatened by invasive grasses, climate change, and altered fire regimes that can disturb the landscape.
The largely semi-arid lands are also important for the survival of species that need undisturbed sagebrush ecosystems to thrive. Sorting Landsat data into an accurate and reliable record of land cover in the United States is one of the most important jobs at EROS.
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