How does the data set represent geographic features?
• How are geographic features stored in the data set? This is a Vector data set. It contains the following vector data types (SDTS terminology): • Entity Point (611) • What coordinate system is used to represent geographic features? Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.01 minutes. Longitudes are given to the nearest 0.01 minutes. Latitude and longitude values are specified in Degrees and decimal minutes. The horizontal datum used is North American Datum of 1927. The ellipsoid used is Clarke 1866. The semi-major axis of the ellipsoid used is 6378206.4. The flattening of the ellipsoid used is 1/294.98. Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum 1929 Altitude_Resolution: 0.1 Altitude_Distance_Units: feet Altitude_Encoding_Method: attribute values • How does the data set describe geographic features? Entity_and_Attribute_O
• How are geographic features stored in the data set? This is a Vector data set. It contains the following vector data types (SDTS terminology): • Point (21465) • Complete chain (29972) • GT-polygon composed of chains (12860) • What coordinate system is used to represent geographic features? The map projection used is Albers Conical Equal Area. Projection parameters: Standard_Parallel: 29.50 Standard_Parallel: 45.50 Longitude_of_Central_Meridian: -96.0 Latitude_of_Projection_Origin: 23.0 False_Easting: 0.0 False_Northing: 0.0 Planar coordinates are encoded using coordinate pair Abscissae (x-coordinates) are specified to the nearest 1000 Ordinates (y-coordinates) are specified to the nearest 1000 Planar coordinates are specified in meters The horizontal datum used is NAD27. The ellipsoid used is Clarke 1866. The semi-major axis of the ellipsoid used is 6378. The flattening of the ellipsoid used is 1/295. • How does the data set describe geographic features? Geologic unitBedrock formatio
• How are geographic features stored in the data set? This is a Vector data set. It contains the following vector data types (SDTS terminology): • Point (816) • String (2288) • GT-polygon composed of chains (817) • What coordinate system is used to represent geographic features? The map projection used is Polyconic. Projection parameters: Longitude_of_Central_Meridian: -117.1875 Latitude_of_Projection_Origin: 34.00 False_Easting: 0.0 False_Northing: 0.0 Planar coordinates are encoded using coordinate pair Abscissae (x-coordinates) are specified to the nearest 0.0000001 Ordinates (y-coordinates) are specified to the nearest 0.0000001 Planar coordinates are specified in Meters The horizontal datum used is North American Datum of 1927. The ellipsoid used is Clarke 1866. The semi-major axis of the ellipsoid used is 6378206.4. The flattening of the ellipsoid used is 1/294.98. • How does the data set describe geographic features? Entity_and_Attribute_Overview: The ARC/INFO version of the Geo
• How are geographic features stored in the data set? This is a raster data set. It contains the following raster data types: • Dimensions 8511 x 8901, type grid cell • What coordinate system is used to represent geographic features? The map projection used is Transverse Mercator. Projection parameters: Scale_Factor_at_Central_Meridian: 0.926 Longitude_of_Central_Meridian: -100.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 0 False_Northing: 0 Planar coordinates are encoded using row and column Abscissae (x-coordinates) are specified to the nearest 1000 Ordinates (y-coordinates) are specified to the nearest 1000 Planar coordinates are specified in meters The horizontal datum used is North American Datum of 1927. The ellipsoid used is sphere. The semi-major axis of the ellipsoid used is 6371204.0. The flattening of the ellipsoid used is 1/0.926. • How does the data set describe geographic features? Entity_and_Attribute_Overview: This metadata file describes three individual but rel
• How are geographic features stored in the data set? This is a Vector data set. It contains the following vector data types (SDTS terminology): • Point (954) • String (2569) • GT-polygon composed of chains (955) • What coordinate system is used to represent geographic features? The map projection used is Polyconic. Projection parameters: Longitude_of_Central_Meridian: -117.0625 Latitude_of_Projection_Origin: 34.2500 False_Easting: 0.00000 False_Northing: 0.00000 Planar coordinates are encoded using coordinate pair Abscissae (x-coordinates) are specified to the nearest 0.0000001 Ordinates (y-coordinates) are specified to the nearest 0.0000001 Planar coordinates are specified in Meters The horizontal datum used is North American Datum of 1927. The ellipsoid used is Clarke 1866. The semi-major axis of the ellipsoid used is 6378206.4. The flattening of the ellipsoid used is 1/294.98. • How does the data set describe geographic features? Entity_and_Attribute_Overview: Version 1.0 of the Di
