Summary Descriptive Characteristics by Catchment Concerning Lidar-derived Ditches in Eastern North Carolina, 2014-2015
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 Lidar) was then refined by masking natural water ways (stream valleys) and channels that are associated with transportation and urban areas. This shapefile is a depiction of National Hydrography Dataset (NHD) Plus V2 catchments, defined by a COMID, with summary statistics about the ditches identified in the course of this project.
Complete Metadata
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| description | 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 Lidar) was then refined by masking natural water ways (stream valleys) and channels that are associated with transportation and urban areas. This shapefile is a depiction of National Hydrography Dataset (NHD) Plus V2 catchments, defined by a COMID, with summary statistics about the ditches identified in the course of this project. |
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| identifier | http://datainventory.doi.gov/id/dataset/USGS_6172b916d34ea36449a8818a |
| keyword |
[
"Agriculture",
"Artificial drainage",
"Beaufort",
"Bertie",
"Bladen",
"Brunswick",
"Camden",
"Canals",
"Carteret",
"Chowan",
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| modified | 2022-07-12T00:00:00Z |
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| spatial | -79.7742, 33.7937, -75.4141, 36.6643 |
| theme |
[
"Geospatial"
]
|
| title | Summary Descriptive Characteristics by Catchment Concerning Lidar-derived Ditches in Eastern North Carolina, 2014-2015 |
