Filters: Tags: Terrain Analysis (X)
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A raster of the ten most common geomorphic landscape forms in North Carolina. Common geomorphic forms were identified using light detection and ranging (lidar) derived digital elevation models (DEM) with a resolution of 30 ft. (~10m). Common forms were created using r.geomorphon, a feature in GRASS GIS (Stepinski et al., 2011; Jasiewicz et al., 2013). Geomorphon requires a user input search radius and flatness threshold. A search radius of 60 cells (1800 ft.) was used for the entire state and two different flatness thresholds values of 1 degree for portions of the state in the Blue Ridge/Piedmont ecoregion and 0.0001 degree for portions of the state in the Coastal Plain ecoregion. Stepinski, T., Jasiewicz, J.,...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: North Carolina,
geomorphology,
geomorphon,
terrain analysis
Rasters of positive openness for the 53 hydrologic unit code (HUC) 8 watersheds in the state of North Carolina. Positive openness uses a line-of-sight approach to measure the surrounding eight zenith angles viewed above the landscape surface out to a specified distance. The central cells gets and average of the eight angles. An angle of 90 degrees would indicate a flat surface, while angles less than 90 degrees indicate a concave surface. Positive openness was calculated with the Relief Visualization Toolbox (https://iaps.zrc-sazu.si/en/rvt#v, Kokalji et al., 2011; Zakšek et al., 2011) using light detection and ranging (lidar) derived digital elevation models (DEM) with a resolution of 10 ft. (~3m). A length scale...
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