David Coley Unpublished Material MsActivePits80s vector digital data \\OFFICE\C$\mining_data\SandGravelMines.mdb This feature class contains polygons representing actual mine pits, including ridge and furrow operations. A regional scale analysis of the geomorphologic impact that floodplain and in-channel mining has produced for certain rivers in Mississippi. This metadata file may include some ArcGIS specific terminology. 1982 2000 ground condition In work None planned -90.215715 -88.394072 33.703054 30.407735 None Mining Rivers Floodplain None Mississippi None Surface 1982 1995 None The data are not survey products and not intended for legal use. David Coley Geography Department, University of Florida Assistant Scientist mailing and physical address
P.O. Box 117315
3141 Turlington Hall
Gainesville FL 32611-7315 United States 352-392-3198 x219 dcoley@geog.ufl.edu 9-5 United States Geologic Survey (USGS) Mississippi Automated Resource Infromation System (MARIS) The Louisiana State Atlas Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722 USGS quadrangle names were supplied from the Public Land Survey System (PLSS) data supplied to this project from MARIS and Atlas. Stream names are supplied from USGS 1:24000 Digital Raster Graphics. All polygons are closed. Initial problems included short segments and self intersections. Line segments are a set of sequentially numbered coordinate pairs. No duplicate features exist nor duplicate points in a data string. Intersecting lines are separated into individual line segments at the point of intersection. Point data are represented by two sets of coordinate pairs, each with the same coordinate values. Tests for logical consistency were performed by running the Check Geometry tool and repaired with the Repair Geometry tool. Two stand-alone tables in the database report as such. This data set is 95% complete. Some attribution is missing in the LaMineSites feature dataset. Specifically, USGS quadrangle names for the Amite River mine area and mine pit polygons were not reported, as are estimates of the length of floodplain impacted by the same mine sites and pits. The Amite River sites and pits were compiled for a slightly different project, and then imported into this database in order to provide a more complete coverage of mining activities in Louisiana. The horizontal accuracy of the data is in accordance with National Mapping Accuray Standards for data compiled at 1:24000, which represents a possible error of +/- 40 for well-defined man-made features. The DOQQS used as base maps are well within this standard. However, no RMSE report(s) are available on photo orthorecitification. 24000 online 1955 1960 MARIS (www.maris.state.ms) and ATLAS (http://atlas.lsu.edu/) 24000 online 1982 1982 MARIS DRGs 40000 online 1992 1996 MARIS DOQQs 62500 online 1945 1955 UA University of Alabama All feature classes within each feature data set were orinally created as ARC/INFO coverages. Topological consistency was checked through ARC/INFO commands BUILD and CLEAN. Channel and channel features were manuallly digitized over 1: 24000 and 1: 62500 scale USGS DRGs, 1:40000 scale (1m pixel resoluion) DOQQs and historic 1955-60 FSA aerial photos (1:20000 scale) scanned at 500dpi to create a 1m pixel ground-resolution. The 15-minute series maps were georeferecnced to using 1: 24000 scale Public Land Survey System (PLSS) grid intersections as control points in ArcGIS 8.3. A minimum of 30 ground control points (GCPs) were used producing an average root mean square error (RMSE) of 9 meters. The strms40s data were then derived from these DRGs. The historic aerials were georefereced using a minimum of 16 GCPs in ERDAS Imagine. The RMSE is less than 1 meter for all photos. The strms50s coverages were then created from these photos, while the strms80s and strms90s coverages were created with the aid of the 1:24000 DRGs and DOQQs, respectfully. All coverages are double precision. Digitization tolerances are: Weed: 0.5 meter. Fuzzy: 0.5 meter. Dangle: 5 meters Edit: 30 meters Nodesnap: 5 meters. All QA/QC was performed manually, where any gross digitizing errors in channel positions or in the extent of channel features were corrected. These coverages were then converted to Personal Geodatabase feature classes. The strms40s data were not used in analyses operations due to the limited basin coverage and the horizontal accuracy of that data. Topology rules described above ensured all data remained clean. Feature class cluster tolerances are less than 0.5 meters. D:\coley\pasca_project.mdb 1997 Dataset copied. G:\share\Mossa_project\coley_pasca\pasca_project.mdb Metadata imported. C:\David\Pascagoula\Pasca_metadata.xml Metadata imported. C:\mining_data\SandAndGravel.xml Metadata imported. C:\mining_data\SandAndGravelFCs.xml Metadata imported. C:\mining_data\SandAndGravelPitFC.xml Metadata imported. C:\mining_data\SandAndGravelFCPitMS.xml Vector G-polygon 288 Transverse Mercator 0.999830 -89.750000 32.500000 500000.000000 1300000.000000 coordinate pair 0.001024 0.001024 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 0.000010 Explicit elevation coordinate included with horizontal coordinates MsActivePits80s USGS Floodplain and In-channel Mining Analysis Project OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. SHAPE Feature geometry. ESRI Coordinates defining the features. RefID USGS Quad Number USGS RiverName Name of Stream USGS QuadName Name of USGS quadrangle USGS TechDate Initials of the technician assigned and date (month/year) Project specific Year_ Indicates year of DOQQ Atlas OperType Indicates Pit or Ridge and Furrow type of mine. MIT SHAPE_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. MMUStatus Indicates if afffected stream is large enough to caputure as polygon. Project specific Impacted Indicates if stream channel is visibly impacted by mining operation on a site by site basis Project specific ActiveCode Indicates if a Pit is appears to be actively mined. Turbulent water and disturbd vegetation indicates active. SHAPE_Area Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. FpLength MsMineSites USGS Floodplain and In-channel Mining Analysis Project Downloadable Data 20060814 David Coley University of Florida GIS Analyst mailing and physical address
P.O. Box 117315
3141 Turlington Hall
Gainesville FL 32611-7315 United States 352-392-0494 x 219 dcoley@geog.ufl.edu FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile