Char, Stephen J., and Rafferty, Sharon A. 20021007 vector digital data Open-File Report OFR 02-338 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ofr02-338_stdyarea U.S. Geological Survey 1999 world wide web document Open-File Report OFR 99-001 Denver, Colorado U.S. Geological Survey accessed March 25, 2002 http://pubs.usgs.gov/ds/2006/193/intro.html The U.S. Geological Survey developed this dataset as part of the Colorado Front Range Infrastructure Resources Project (FRIRP). One goal of the FRIRP was to provide information on the availability of those hydrogeologic resources that are either critical to maintaining infrastructure along the northern Front Range or that may become less available because of urban expansion in the northern Front Range. This dataset extends from the Boulder-Jefferson County line on the south, to the middle of Larimer and Weld Counties on the North. On the west, this dataset is bounded by the approximate mountain front of the Front Range of the Rocky Mountains; on the east, by an arbitrary north-south line extending through a point about 6.5 kilometers east of Greeley. This digital geospatial dataset consists of study-area outlines from hand-drawn maps. This dataset was created by the U.S. Geological Survey (USGS) in the development of the USGS Front Range Infrastructure Resources Project. This dataset was used in the creation of 1:50,000-scale hydrogeologic contour maps. It also was used to complete polygon datasets that were created in the development of the project. Study-area outlines were manually copied onto mylar overlays of paper USGS 7.5-minute topographic series quadrangle maps that encompass the Colorado Front Range Infrastructure Resources Project area. The mylar overlays were scanned into Tagged Image File Format (TIFF) image files that were then converted into Arc/INFO raster datasets known as grids. The grids were converted into vector datasets known as coverages in Arc/INFO-specific terminology. The coverages were then projected into a common map coordinate system. The vectors from each coverage was appended into a single coverage in which dangling vectors less than 12 meters long were removed and in which vector vertices and nodes within 2 meters of each other were merged. Linework interior to the study area was added to split the study area into four parts by the previously outlined process of scanning, registering, vectorizing, and appending. The coverage was built with line topology. The coverage was plotted at 1:24,000 scale, checked against the mylar overlays, and corrected. Once the linework was corrected, polygon topology was built. Polygon item "AREAS" was then added to the polygon attribute table of the coverage and populated. The final coverage is intended to be used as one thematic layer in maps to be published at a scale of 1:50,000. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the dataset in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. 20021007 publication date Complete None planned -105.298350 -104.597863 40.750640 39.913379 none infrastructure inlandWaters none Colorado Denver Boulder Fort Collins Greeley None This dataset should not be used at a scale larger than 1:50,000. U.S. Geological Survey Colorado District Chief Colorado District Chief mailing

PO BOX 25046 MS 415

Denver Colorado 80225-0046 United States 1-888-275-8747 303-236-4912 dc_co@usgs.gov Microsoft Windows NT Version 4.0 (Build 1381) Service Pack 6; ESRI ArcCatalog 8.2.0.700 Rafferty, Sharon A., Arnold, L.R., and Char, Stephen J. 20021007 vector digital data Open-File Report OFR 02-338 Denver, Colorado U.S. Geological Survey Char, Stephen J. 20021007 vector digital data Open-File Report OFR 02-338 Denver, Colorado U.S. Geological Survey Rafferty, Sharon A., Arnold, L.R., and Char, Stephen J. 20021007 vector digital data Open-File Report OFR 02-338 Denver, Colorado U.S. Geological Survey Char, Stephen J. 20021007 vector digital data Open-File Report OFR 02-338 Denver, Colorado U.S. Geological Survey Char, Stephen J., and Arnold, L.R. 20021007 vector digital data Open-File Report OFR 02-338 Denver, Colorado U.S. Geological Survey Char, Stephen J. 20021007 report Open-File Report OFR 02-338 Denver, Colorado U.S. Geological Survey Char, Stephen J., and Arnold, R.L. 20021007 vector digital data Open-File Report OFR 02-338 Denver, Colorado U.S. Geological Survey Char, Stephen J. 20021007 vector digital data Open-File Report OFR 02-338 Denver, Colorado U.S. Geological Survey Char, Stephen J., and Arnold, L.R. 20021007 vector digital data Open-File Report OFR 02-338 Denver, Colorado U.S. Geological Survey Char, Stephen J. 20021007 vector digital data Open-File Report OFR 02-338 Denver, Colorado U.S. Geological Survey Rafferty, Sharon A., Char, Stephen J., and Arnold, L.R. 20021007 vector digital data Open-File Report OFR 02-338 Denver, Colorado U.S. Geological Survey Char, Stephen J. 20021007 vector digital data Open-File Report OFR 02-338 Denver, Colorado U.S. Geological Survey Chain-node topology, as verified by ESRI Arc/INFO v. 7.x BUILD, is present Information concerning completeness that is not contained in the Supplemental_Information element can be found in Robson and others (2000a, 200b, 2000c, 2000d). The horizontal positional accuracy value pertains to accuracy of transcription from manuscript to digital format. Digitized linework should fall within 0.02 inch of original 1:24,000-scale mylars. At a scale of 1:24,000, 0.02 inches equals 12.2 meters. 12.2 No tests were performed to verify the Horizontal Positional Accuracy Value. U.S. Geological Survey unknown map U.S. Geological Survey 7.5-minute Topographic Map various Reston, Virginia U.S. Geological Survey 24000 paper unknown Map marginalia U.S.G.S. 7.5-minute topo sheet areal backdrop, political boundaries See Supplemental Information. 20021007 Vector Complete chain 54 Label point 4 GT-polygon composed of chains 4 String 93 Universal Transverse Mercator 13 0.999600 -105.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000256 0.000256 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 stdyarea.aat vector attribute table U.S. Geolgical Survey FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. FNODE# Internal node number for the beginning of an arc (from-node). ESRI Whole numbers that are automatically generated. TNODE# Internal node number for the end of an arc (to-node). ESRI Whole numbers that are automatically generated. LPOLY# Internal node number for the left polygon. ESRI Whole numbers that are automatically generated. RPOLY# Internal node number for the right polygon. ESRI Whole numbers that are automatically generated. LENGTH Length of feature in internal units. ESRI Positive real numbers that are automatically generated. STDYAREA# Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. STDYAREA-ID User-defined feature number. ESRI whole numbers stdyarea.pat polygon attribute table U.S. Geological Survey FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. AREA Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. PERIMETER Perimeter of feature in internal units. ESRI Positive real numbers that are automatically generated. STDYAREA# Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. STDYAREA-ID User-defined feature number. ESRI Whole numbers AREAS The names of the four subdivided areas in the study area. U.S. Geological Survey BOULDER-LONGMONT Name of the subarea. Place names within the subarea. FORT COLLINS-LOVELAND Name of the subarea. Place names within the subarea. FORT LUPTON-GILCREST Name of the subarea. Place names within the subarea. GREELEY-NUNN Name of the subarea. Place names within the subarea. U.S. Geological Survey Ask USGS - Water Webserver Team mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr02-338_stdyarea Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Export Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/stdyarea.e00.gz SDTS Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/stdy.tgz Shape Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/stdyarea_shape.tgz None. This dataset is provided by USGS as a public service. 20041108 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr02-338_stdyarea FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998