system filename: geol250 file size = 2.1 mb Revisions and updates to this layer include: 3.) filename: geol2501298 The December 1998 update to this layer consisted of projecting the data from NAD27 datum, State Plane projection, units of measure feet TO: NAD83 DATUM, State Plane PROJECTION, UNITS OF MEASURE METERS. This was done to comply with the NC Geographic Information Coordinating Council's "Statement of Direction for North Carolina Corporate Geographic Database Horizontal Reference, Datum and Unit of Measure". This reprojecting was done in various ways depending on the data type and content. Vector data was projected using the 'project' command in ESRI's Arc software and topology was cleaned and built based on coverage needs. Raster data was projected using ESRI's Grid module and various steps as applicable. 2.) filename: geol25093 - This represents the 1993 version which contains the following correction. In the spring of 1993, a geologic formation (ZYba, Amphibolite) in Macon County was added in order to correct the digital file. This formation had been omitted in the original digitization. The file containing the omitted information has been deleted. The associated files names are: geol250d for dikes and geol250f for faults. 1.) filename: geol25086 The 1986 version was the first release. (previously named nc250.geo).
Division of Land Resources Director, Charles H. Gardner NC Geological Survey Chief, Jeff Reid NC Dept. of Environment, Health, and Natural Resources 512 N. Salisbury Street Raleigh, NC 27604-1148 NCCGIA Director, Karen Siderelis Database Administration, Zsolt Nagy Database Management, Ken Shaffer North Carolina Center for Geographic Information and Analysis Governor's Office Office of State Planning 301 North Wilmington Street, Suite 700 Raleigh, NC 27601-2825
GEOL250.PAT Polygon Attribute Table (Geologic Formations) COLUMN ITEM NAME WIDTH OUTPUT TYPE DEC DESCRIPTION 1 AREA 4 12 F 3 Total area in meters 5 PERIMETER 4 12 F 3 Total perimeter in meters 9 GEOL250# 4 5 B - Poly internal id number 13 GEOL250-ID 4 5 B - Poly user id number 17 GEO-NAME 6 6 C - Abbreviation for geologic formation GEOL250.AAT Arc Attribute Table COLUMN ITEM NAME WIDTH OUTPUT TYPE DEC DESCRIPTION 1 FNODE# 4 5 B - From-node id of linear feature 5 TNODE# 4 5 B - To-node id of linear feature 9 LPOLY# 4 5 B - Left-side polygon id of linear feature 13 RPOLY# 4 5 B - Right-side polygon id of linear feature 17 LENGTH 4 12 F 3 Length of linear feature in meters 21 GEOL250# 4 5 B - Internal id number 25 GEOL250-ID 4 5 B - Internal id number