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Fine scale DEM was generated by using Terrasolid’s TerraScan Lidar processing software, based on airborne LiDAR data collected on April 19th to 25th, 2005; then a toolbox ArcHydro in the software ArcGIS is used to extract stream network from the DEM data.
The Plum Island Sound estuary water network is made from LIDAR data. The map can be used to study ditches, rivers, tidal creeks, streams and ponds.
The project was funded by the Edna Bailey Sussman Foundation.
Related sites:
EST-PR-RO-SO-BND
Data sources:
WaterNetwork_2005_PlumIslandEstuary_vector_V1_zip
Methods:
The whole water network was generated using Arc Hydro package (http://resources.arcgis.com/en/communities/hydro/01vn0000000s000000.htm) in ArcGIS software.
We followed the procedure: (1) DEM Reconditioning; (2) Fill sinks; (3) Flow direction; (4) Flow accumulation; (5) Stream definition; (6) Stream segmentation. Additional 20 hours were spent on manual edition based on the latest fine-resolution 2015 image after we processed topographic data in Arc Hydro.
Information relevant to the GIS data encoding
Fine scale DEM was generated by using Terrasolid’s TerraScan Lidar processing software, based on airborne LiDAR data collected on April 19th to 25th, 2005; then a toolbox ArcHydro in the software ArcGIS is used to extract stream network from the DEM data.
Geographic Coordinate Reference: GCS_North_American_1983
Projection: North American 1983 UTM Zone 19M
Reference Ellipsoid: Name: GRS 1980 Semi Axis: 6378137.0
Meridian: Greenwich
Additional processing information is available via Sussman2017_FinalReport_SuYe.pdf which can be found in the
WaterNetwork_2005_PlumIslandEstuary_vector_V1.zip Data Source file for this dataset.
Maintenance:
As of Feb 28, 2018, none planned, dataset complete