, Inland St. Lawrence Island 2012 surface water detection (35% or more observations).
This is a Vector data set. It contains the following vector data types (SDTS terminology):
The map projection used is NAD 1983 Alaska Albers.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.0000000030536018158500163
Ordinates (y-coordinates) are specified to the nearest 0.0000000030536018158500163
Planar coordinates are specified in meter
The horizontal datum used is D North American 1983.
The ellipsoid used is GRS 1980.
The semi-major axis of the ellipsoid used is 6378137.0.
The flattening of the ellipsoid used is 1/298.257222101.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
Positive real numbers that are automatically generated.
Annual hydrology product covering area 2km inland of the coastline for 2012 was exported out of the ENVI software (V.5, 2012) as raster images with all areas dichotomized into water detected (1) and solid ground detected (2) at 250 meter spatial resolution. The raster file was then converted into a vector-based format (ArcGIS shapefile) that permits computations of water and ground areas for each year and to visualize possible change detected between the two spatial means of 2 years of observations (2003 and 2012).
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints: None