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    Interaction between the organisms in the natural community and affects on this production capacity.

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    Data Type: ; Digital elevation model 300m grid for Alaska, from Defense Mapping Agency 3-arc second 1x1 degree 1:250,000 scale Digital Elevation Models. Source data for Digital Shaded-Relief Image of Alaska, USGS Map I-2585

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    Data Type: Elevation; Elevation values/elevation classes coded from 1 to 10 valued from 0 to 3,000" respectively. Scale is 1:63,360/60 meter cells. Based on 100 foot contour lines.

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    Digital elevation model 1km grid for Alaska, from Defense Mapping Agency 3-arc second 1x1 degree 1:250,000 scale Digital Elevation Models.

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    Data Type: Elevation; This layer is a composite, merged and generalized shaded relief image organized by 1:250,000 scale USGS quadrangles within the Prince William Sound - Copper River ecosystem. Pacific GIS derived this shaded relief layer from elevation data which is based on digital elevation model (DEM) data at 1:250,000 scale acquired from the USGS EROS Alaska Field Office. The shading is a mathematically calculated value to provide the illusion of a terrain surface being illuminated by an implied light source. It is useful as a back- drop for other data because it gives an intuitive view of the landscape.

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    Data Type: Elevation; This dataset is a representation of elevation based on 1:250,000 scale digital elevation model (DEM) data obtained from the USGS EROS Alaska Field Office. The data are organized by 1:250,000 scale USGS quadrangles and covers the entire Prince William Sound - Copper River ecosystem. Related data sets include elevation (based on 1:63,360 scale DEM's), a merged and generalized 1:250,000 scale elevation map (elev250g), and shaded relief images.

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    Data Type: Elevation;

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    Data Type: Elevation; This layer contains merged and generalized elevation data based on 1:250,000 scale DEM's for Prince William Sound - Copper River ecosystem. The data have been generalized from the full resolution DEM's organized by 250,000 scale quadrangle boundaries. Related data sets include the 1:63,360 scale DEM's and shaded relief images. This layer contains merged and generalized elevation data based on 1:250,000 scale DEM's for Prince William Sound - Copper River ecosystem. The data have been generalized from the full resolution DEM's organized by 250,000 scale quadrangle boundaries. Related data sets include the 1:63,360 scale DEM's and shaded relief mages.

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    Data Type: Elevation; This layer includes slope data covering South Central Alaska organized by 1:250,000 scale USGS quadrangles based on elevation data derived from digital elevation models (DEM) at 1:250,000 scale. The data is divided according to 250,000 scale quad boundaries Related data sets include: slope derived from 1:63,360 scale DEM's and elevation files.

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    Data Type: Elevation; This layer contains a shaded relief representation of elevation for Prince William Sound, the Copper River Delta, and eastern Kenai Peninsula. Pacific GIS derived this layer from an elevation coverage (elev63) based on digital elevation model (DEM) data at 1:63,360 scale. The shading is a mathematically calculated value to provide the illusion of a terrain surface being illuminated by an implied light source. It is useful as a back-drop for other data because it gives an intuitive view of the landscape.