How were the data generated, processed, and modified?
Date: 01-Jun-2005 (process 1 of 5) Boundaries for eighty units were replaced with verified versions from the Lands Resources Division according to the procedures defined in the Lands Acquisition Procedures Manual Chapter 5. As boundary data from the Land Resources Division has separate polygons for individual types of units like Denali National Park and Denali National Preserve, there are currently one hundred and two total Lands records in the dataset that can be identified by querying for [GIS_Notes] = “Lands” in the attribute table. These parks include: Alagnak Wild River (ALAG), Aniakchak National Monument and Preserve (ANIA), Antietam National Battlefield (ANTI), Appomattox Court House National Historical Park (APCO), Arches National Park (ARCH), Arlington House – Robert E. Lee Memorial (ARHO), Bering Land Bridge National Preserve (BELA), Black Canyon of the Gunnison National Park (BLCA), Brices Cross Roads National Battlefield Site (BRCR), Buffalo National River (BUFF), Carl Sand
Date: 05-May-2008 (process 1 of 3) The airborne GPS data were processed and integrated with the IMU. The results were imported into the ISTAR system for use in the aerotriangulation. The ADS40-52 imagery was downloaded onto the Fugro EarthData, Inc. server and brought over to the UNIX based ISTAR system. The ground control was used in conjunction with the processed ABGPS results for the aerotriangulation. The properly formatted ISTAR results were used for subsequent processing. Person who carried out this activity: Fugro EarthData, Inc. c/o Becky Jordan Project Manager 7320 Executive Way Frederick, Maryland 21704 USA 301-948-8550 (voice) 301-963-2064 (FAX) bjordan@earthdata.com Hours_of_Service: Mon-Fri 8:30am to 5:00pm Data sources used in this process: • Aerotriangulation Data sources produced in this process: • AT Date: 30-May-2008 (process 2 of 3) This process describes the import and QC of the lidar-derived DEM surface from the North Carolina Floodplain Mapping Program for use in
Date: 1997 (process 1 of 12) Digital versions of the state geologic maps were obtained from the originators or authors for Maine (Marc Loiselle, Maine Geological Survey, Augusta, ME), New Hampshire (U.S. Geological Survey), Rhode Island (N. Hamidzeda, University of Rhode Island, Department of Geology, Kingston, RI), and Massachusetts, (Rudolph Hon, Department of Geology, Boston College). The bedrock polylines of Connecticut were pieced together from two digital sources; the Bedrock Geologic map of Rhode Island (which shows a buffer of the adjacent state bedrock units) and the Bedrock Geologic map of Connecticut. Hence some of the bedrock line work and geologic names in Connecticut are from the Bedrock Geologic map of Rhode Island. Date: 1997 (process 2 of 12) The original digital state bedrock data layers were combined into one study-unit wide data layer using the ARC/INFO MAPJOIN command.
Date: 1998 (process 1 of 6) Digitized place names from the 1970 National Atlas of the United States were compared with U.S. Census Bureau place names from FIPS55-3_98. Where there were discrepancies, names from the GNIS were used. A small number of places could not be assigned FIPS55 codes and were removed from the map layer. Minor positional corrections were also made. Data sources used in this process: • 2MILMM • GNIS98 • FIPS55-3_98 Data sources produced in this process: • ATLAS-CITIES98 Date: Feb-2000 (process 2 of 6) No spatial data was changed in ATLAS-CITIES98. The following edits were made to the attribute data base file. In the Feature field, inconsistencies were removed and the population ranges were corrected as necessary to match the 1990 population information in the Pop field. Unnecessary fields were deleted (Idnum, Capcode, Stid). Fields were added for State, State_Fips, and County. Lakewood Center, Washington was changed to Lakewood, Washington with a population of 5841
Date: 1990 (process 1 of 2) The geologic map of the Altiplano/Cordillera Occidental was produced digitally from fifteen, 1:250,000 scale, field compilation maps. These paper maps were made by Servicio Geolgico de Bolivia (GEOBOL) geologists over the last decade. After examination of the field maps it was determined that the best method for capturing the geologic data digitally was by means of an optic scanner. Because of the condition of the maps and the fact that they had been hand colored the geology was transferred to mylar stable-base overlays at 1:250,000 scale using a fine (.35 mm) ink pen prior to scanning. The overlays were then scanned into ARC/INFO using a Tectronics 4991 digital drum scanner. The 15 scanned images were converted into ARC/INFO coverages and edited in ARCEDIT using all 137 geologic units derived from the original field compilation maps. The resulting 15 digital maps at 1:250,000 scale were plotted in color on an electrostatic plotter and then reviewed and edit
