Filters: Tags: Canals (X)
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Note: this data release has been deprecated. Please see new data release here: https://doi.org/10.5066/P9IGSRCV. Artificial drainage has major ecosystem impacts through the development of extensive ditch networks that reduce storage and induce large-scale vegetation changes. This has been a widespread practice of water table management for agriculture in Eastern North Carolina. However, these features are challenging to identify because the structure has been determined by non-natural factors. A dataset of open ditches was processed by calculating terrain (also, positive) openness – a value based on a line-of-sight approach to measure the surrounding eight zenith angles as viewed above the landscape surface. The...
Density of linear features, such as roads, power lines, telephone lines, and railroad tracks have been shown to influence synanthropic predator abundance patterns (Knight et al. 1995). Following Knight et al. (1995), we used linear features such as roads, railroads, and power line spatial data sets, but also included irrigation canals, to build a linear features spatial data set. However, we lacked spatial data on telephone and feeder-power lines and therefore our linear feature spatial data set vastly underestimates the number of linear features in some areas.
Categories: Data;
Types: Downloadable,
Map Service,
Shapefile;
Tags: Arizona,
California,
Colorado,
Idaho,
Montana,
Note: this data release has been deprecated. Please see new data release here: https://doi.org/10.5066/P9IGSRCV. Artificial drainage has major ecosystem impacts through the development of extensive ditch networks that reduce storage and induce large-scale vegetation changes. This has been a widespread practice of water table management for agriculture in Eastern North Carolina. However, these features are challenging to identify because the structure has been determined by non-natural factors. A dataset of open ditches was processed by calculating terrain (also, positive) openness – a value based on a line-of-sight approach to measure the surrounding eight zenith angles as viewed above the landscape surface. The...
Artificial drainage has major ecosystem impacts through the development of extensive ditch networks that reduce storage and induce large-scale vegetation changes. This has been a widespread practice of water table management for agriculture in Eastern North Carolina. However, these features are challenging to identify, and (because of their structure) have been determined by non-natural factors. A dataset of open ditches was processed by calculating terrain openness (also called positive openness): a value based on a line-of-sight approach to measure the surrounding eight zenith angles as viewed above the landscape surface. The result from calculating openness with high resolution digital elevation models (DEMs...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Agriculture,
Artificial drainage,
Beaufort,
Bertie,
Bladen,
Irrigation canals in 11 western states obtained from 2000 US Census TIGER/Line Data.
Irrigation canals in 11 western states obtained from 2000 US Census TIGER/Line Data.
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Arizona,
California,
Colorado,
Idaho,
Montana,
Artificial drainage has major ecosystem impacts through the development of extensive ditch networks that reduce storage and induce large-scale vegetation changes. This has been a widespread practice of water table management for agriculture in Eastern North Carolina. However, these features are challenging to identify, and because of their structure, have been determined by non-natural factors. A dataset of open ditches was processed by calculating terrain openness (also called positive openness): a value based a line-of-sight approach to measure the surrounding eight zenith angles as viewed above the landscape surface. The result from calculating openness with high resolution digital elevation models (DEMs, or...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Agriculture,
Artificial drainage,
Beaufort,
Bertie,
Bladen,
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