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): • GT-polygon composed of chains (989) • 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 0.002. Longitudes are given to the nearest 0.002. Latitude and longitude values are specified in Decimal Degrees. • How does the data set describe geographic features? ib_heeledd.dbfShapefile Attribute Table Gridcodenumeric code for elevation categories Range of values Minimum:-2350 Maximum:850 Legendenglish description of elevation categories Character Field Entity_and_Attribute_Overview: Areas defined as “no coal” or “Insufficient Data” are where the *position* of the coals is identifiable using the surrounding stratigraphy, but there is no coal preserved in the rock record. They are areas within the outcrop ex
• How are geographic features stored in the data set? • What coordinate system is used to represent geographic features? Grid_Coordinate_System_Name: State Plane Coordinate System 1983 State_Plane_Coordinate_System: SPCS_Zone_Identifier: 4602 Lambert_Conformal_Conic: Standard_Parallel: 45.33333 Standard_Parallel: 47.33333 Longitude_of_Central_Meridian: -120.50000 Latitude_of_Projection_Origin: 45.83333 False_Easting: 500000.0 False_Northing: 0.0 Planar coordinates are encoded using coordinate pair Abscissae (x-coordinates) are specified to the nearest 0.1 Ordinates (y-coordinates) are specified to the nearest 0.1 Planar coordinates are specified in meters The horizontal datum used is North American Datum of 1983. The ellipsoid used is Geodetic Reference System 80. The semi-major axis of the ellipsoid used is 6378137.0. The flattening of the ellipsoid used is 1/294.98.
• 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 • GT-polygon composed of chains • 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 0.001. Longitudes are given to the nearest 0.001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is North American Datum of 1983. The ellipsoid used is Geodetic Reference System 80. The semi-major axis of the ellipsoid used is 6378137. The flattening of the ellipsoid used is 1/298.257. • How does the data set describe geographic features? Entity_and_Attribute_Overview: The following is a brief description of the data layers, tables, and their associated attributes that are used in this report. GEOLOGIC DATA: ASECTION – Line and polygon data for the A-A’ cross se
• 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 • Complete chain • GT-polygon composed of chains • 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 0.001. Longitudes are given to the nearest 0.001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is North American Datum of 1983. The ellipsoid used is Geodetic Reference System 80. The semi-major axis of the ellipsoid used is 6378137. The flattening of the ellipsoid used is 1/298.257. • How does the data set describe geographic features? Entity_and_Attribute_Overview: The following is a brief description of the data layers, tables, and their associated attributes that are used in this report. GEOLOGIC DATA: CARBON – polygon data layer of carbon
• 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 (397625 records in the sediment dataset, 335547 records in the water dataset) • 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 Variable, generally a few thousandths of a degree. Longitudes are given to the nearest Variable, generally a few thousandths of a degree. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is North American Datum of 1927. The ellipsoid used is Clarke 1866. • How does the data set describe geographic features? Entity_and_Attribute_Overview: The data set contains 226 different attributes in two tables, a sediment table and a water table. These are documented in detail in a database manual. The following list shows, by general cat
