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One Meter Hillshade, Derived from LiDAR Data: Iowa

Hillshade is the hypothetical illumination of a surface by determining illumination values for each cell in a raster. It does this by setting a position for a hypothetical light source and calculating the illumination values of each cell in relation to neighboring cells. It can greatly enhance the visualization of a surface for analysis or graphical display, especially when using transparency. (ESRI definition) This hillshade was generated from the Iowa Bedrock Surface Elevation raster. This data set represents an artificial hill shading of the land surface of Iowa, in the UTM projection, Zone 15, NAD83 Datum. The hill shade was calculated using one meter resolution elevation data from the state of Iowa's LiDAR program. Hill shading of water features sometimes has a triangular appearance due to lack of lidar returns over water and should be ignored. Azimuth is the angular direction of the illumination source (for example, the sun); the default angle of 315 is northwest. Altitude is the slope or angle of the illumination source above the horizon. The default is 45 degrees above the surface.
Iowa GeoData
Iowa, United States
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