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ROOT _ScienceBase Catalog __LC MAP - Landscape Conservation Management and Analysis Portal ___North Pacific Landscape Conservation Cooperative Filters
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Data represent presence/absence for cedar decline occurrence. Cedar decline refers to the dying or decline of yellow-cedar (Chamaecyparis nootkatensis) forests in Southeast Alaska and is characterized by red or yellow foliage in trees currently dying, or by white-gray snags of old mortality. Mapped snags can be standing dead as long as eighty years. The data were collected via aerial sketch mapping techniques and recorded on 1:250,000 USGS base maps from 500-3000 foot above ground level(AGL) observations. Survey coverage has been most intense for forests adjacent to shorelines and waterways. Data are collected, refined and updated on an annual basis. This data represent not one year's mortality but the cumulative...
Categories: Data;
Types: ArcGIS REST Map Service,
Map Service;
Tags: Aerial,
Alaska,
Damage,
Disease,
Forest,
Humans have dramatically altered wildlands in the western United States over the past 100 years by using these lands and the resources they provide. Anthropogenic changes to the landscape, such as urban expansion, construction of roads, power lines, and other networks and land uses necessary to maintain human populations influence the number and kinds of plants and wildlife that remain. We developed the map of the human footprint for the western United States from an analysis of 14 landscape structure and anthropogenic features: human habitation, interstate highways, federal and state highways, secondary roads, railroads, irrigation canals, power lines, linear feature densities, agricultural land, campgrounds, highway...
These value-added, raster-based maps of forest fragmentation were produced using Coastal Change Analysis Program (C-CAP) regional land cover data. The analysis was performed using the Landscape Fragmentation Tool from the University of Connecticut’s Center for Land Use Education and Research (CLEAR). Intact forests are ecologically important but are becoming increasingly susceptible to development pressures and conversion. Forest fragmentation is the breaking up of large contiguous forest tracts into smaller, or less contiguous, areas. It is important to look at not only the net change in forest area, but also the spatial pattern of the observed changes. In these data, forest fragmentation is classified into four...
The Protected Areas Database of the United States (PAD-US) is a GIS database hosted by the USGS Gap Analysis Program (GAP) that illustrates and describes public land ownership, management and conservation lands nationally, including voluntarily provided privately protected areas. Version 1.2 of this data set was released by GAP in April, 2011 and can be downloaded from the USGS PAD-US web site (data available in geodatabase and shape file formats). The web site includes an online map viewer for the data as well as information on PAD-US standards, core attribute schema and a summary of commonly requested statistics. GAP compiled the Protected Areas Database of the United States (PAD-US) version 1.1 with significant...
Categories: Data;
Types: ArcGIS REST Map Service,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: CBI,
Conservation,
Conservation Biology Institute,
Database,
GAP,
This map service is an information surface which displays the hydrologic soil group class of each soil map unit based upon the dominant component in the soil map unit. Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well...
Categories: Data;
Types: ArcGIS REST Map Service,
Map Service;
Tags: Hydrology,
hydrogeology,
infiltration,
permeability,
porosity,
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