Vegetation Plot Data of the Coastal Wetland Elevation Monitoring Sites on National Wildlife Refuges in the South Atlantic Geography.
공공데이터포털
Plot level raw datasets--including Cover, Woody Stem, Plot/Environmental, and Soil--from vegetation sampling on Coastal Wetland Elevation Monitoring Sites within the South Atlantic Geography. There are four tabular datasets for each sampling year, representing the raw data collected from vegetation plots established at each of the South Atlantic Geography Coastal Wetland Elevation Monitoirng Sites. File naming structure is as follows: CWEM (standard)_YearSampled_DatasetType. Datasets include: 1) CWEM_xxxx_Cover: cover class values by taxon and nested quadrat depth by taxon; 2) CWEM_xxxx_Stems: woody stem counts by diameter class and taxon; 3) CWEM_xxxx_Plots: plot metadata, environmental attributes, and disturbance history; and 4) CWEM_xxxx_Soil: soil chemistry and texture analysis results. 2013 files represent the first year of vegetation sampling (baseline) on 20 CWEM sites across 18 refuges within the SALCC, including: ACE Basin, Alligator River (2), Blackbeard Island, Cedar Island, Currituck, Harris Neck, Lower Suwannee (2), Mackay Island, Pea Island, Pinckney Island, Pocosin Lakes, Roanoke River, Savannah, St. Marks, Swanquarter, Waccamaw, Wassaw, and Wolf Island NWR. 2016 files represent the second year of vegetation sampling on 18 of the baseline 20 CWEM sites (Pocosin Lakes and Lower Suwannee-Dan May Creek site not accessed in 2016) and first year sampling (baseline) for the newly established Cape Romain NWR sites (2).
Vegetation Plot Data of the Coastal Wetland Elevation Monitoring Sites on National Wildlife Refuges in the South Atlantic Geography.
공공데이터포털
Plot level raw datasets--including Cover, Woody Stem, Plot/Environmental, and Soil--from vegetation sampling on Coastal Wetland Elevation Monitoring Sites within the South Atlantic Geography. There are four tabular datasets for each sampling year, representing the raw data collected from vegetation plots established at each of the South Atlantic Geography Coastal Wetland Elevation Monitoirng Sites. File naming structure is as follows: CWEM (standard)_YearSampled_DatasetType. Datasets include: 1) CWEM_xxxx_Cover: cover class values by taxon and nested quadrat depth by taxon; 2) CWEM_xxxx_Stems: woody stem counts by diameter class and taxon; 3) CWEM_xxxx_Plots: plot metadata, environmental attributes, and disturbance history; and 4) CWEM_xxxx_Soil: soil chemistry and texture analysis results. 2013 files represent the first year of vegetation sampling (baseline) on 20 CWEM sites across 18 refuges within the SALCC, including: ACE Basin, Alligator River (2), Blackbeard Island, Cedar Island, Currituck, Harris Neck, Lower Suwannee (2), Mackay Island, Pea Island, Pinckney Island, Pocosin Lakes, Roanoke River, Savannah, St. Marks, Swanquarter, Waccamaw, Wassaw, and Wolf Island NWR. 2016 files represent the second year of vegetation sampling on 18 of the baseline 20 CWEM sites (Pocosin Lakes and Lower Suwannee-Dan May Creek site not accessed in 2016) and first year sampling (baseline) for the newly established Cape Romain NWR sites (2).
Geospatial data for the Vegetation Mapping Inventory Project of Marsh-Billings-Rockefeller National Historical Park
공공데이터포털
The files linked to this reference are the geospatial data created as part of the completion of the baseline vegetation inventory project for the NPS park unit. Current format is ArcGIS file geodatabase but older formats may exist as shapefiles. Following development of vegetation classifications after plot sampling, the preliminary vegetation map was further edited and refined in 2005. Using ArcGIS 9.0, polygon boundaries were revised on-screen based on plot data and additional field observations collected during 2004 field visits. Field notes and limited field mapping supplemented GIS mapping. Each polygon was attributed with a map class name that is the common name of a USNVC association, a park-specific map class name representing a variant of an association, or an Anderson Level II use/land cover map class based on plot data, field observations, aerial photography signatures, and topographic maps. Map units in the 2005 vegetation map were equivalent to the association level with few exceptions. The overall 2005 map accuracy and Kappa index was 76%, which fell below the USGS/NPS vegetation mapping protocol requirement of 80%. Revisions were subsequently made to the 2005 vegetation map to increase the accuracy of the final product. The final 2007 vegetation map accuracy was 85.7% and Kappa index was 84.6%.
Geospatial data for the Vegetation Mapping Inventory Project of Marsh-Billings-Rockefeller National Historical Park
공공데이터포털
The files linked to this reference are the geospatial data created as part of the completion of the baseline vegetation inventory project for the NPS park unit. Current format is ArcGIS file geodatabase but older formats may exist as shapefiles. Following development of vegetation classifications after plot sampling, the preliminary vegetation map was further edited and refined in 2005. Using ArcGIS 9.0, polygon boundaries were revised on-screen based on plot data and additional field observations collected during 2004 field visits. Field notes and limited field mapping supplemented GIS mapping. Each polygon was attributed with a map class name that is the common name of a USNVC association, a park-specific map class name representing a variant of an association, or an Anderson Level II use/land cover map class based on plot data, field observations, aerial photography signatures, and topographic maps. Map units in the 2005 vegetation map were equivalent to the association level with few exceptions. The overall 2005 map accuracy and Kappa index was 76%, which fell below the USGS/NPS vegetation mapping protocol requirement of 80%. Revisions were subsequently made to the 2005 vegetation map to increase the accuracy of the final product. The final 2007 vegetation map accuracy was 85.7% and Kappa index was 84.6%.