Causey, J.D. 2007, revised 2008, 2009, 2011 4 vector digital data Data Series 290 Menlo Park, California U.S. Geological Survey http://pubs.usgs.gov/ds/2007/290/ The Public Land spatial data sets (shapefile) contains Public Land Survey section polygons that had mining claims recorded in the U.S. Bureau of Land Management's LR2000 database as of December 31, 2010 (from a March 1, 2011 data extraction) for the period from 1976 to 2010 in Arizona, Arkansas, California, Colorado, Florida, Idaho, Montana, Nebraska, New Mexico, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington, and Wyoming. Alaska was not updated in version 4. This set of spatial databases was designed to be used with the U.S Bureau of Land Management LR2000 database. Each shapefile contains a field, MTRS, which allows linking information in the LR2000 case_tbl and case_land tables. However, it is only valid for data extracted from the LR2000 database on March 1, 2011, since the database is dynamic and new information may have been added after that date, or older information corrected. Shapefile names for the individual states are: ak_pls_07, az_pls_10 (Arizona), ar_pls_10 (Arkansas), ca_pls_10 (California), co_pls_10 (Colorado), fl_pls_10 (Florida), id_pls_10 (Idaho), mt_pls_10 (Montana), ne_pls_10 (Nebraska), nm_pls_10 (New Mexico), nv_pls_10 (Nevada), or_pls_10 (Oregon), sd_pls_10 (South Dakota), ut_pls_10 (Utah), wa_pls_10 (Washington), and wy_pls_10 (Wyoming). 20110301 publication date Complete Annually -125 -80 49 31 None Mining claim Public Land Survey Meridian Township Range Section None Alaska Arizona Arkansas California Colorado Florida Idaho Montana Nebraska Nevada New Mexico Oregon South Dakota Utah Washington Wyoming United States None These spatial databases are not meant to be used or displayed at any scale larger than 1:100,000 (for example, 1:24,000). Any hardcopies utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, they are obligated to describe the types of modifications they have performed on the hardcopy map. User specifically agrees not to misrepresent these data sets, nor imply that changes they made were approved by the U.S. Geological Survey. J. D. Causey U.S. Geological Survey Geologist mailing and physical address

904 W. Riverside Ave, Rm 202

Spokane WA 99201-1087 USA 509.368.3116 509.368.3199 dcausey@usgs.gov See metadata for individual shapefiles None Unclassified None Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535 Varies. See metadata embedded in the individual shapefiles. Varies. See metadata embedded in the individual shapefiles. Varies. See metadata embedded in the individual shapefiles. Varies by state due to differences in preparation procedures by the state governments. Details found in metadata for the pls data for each state. Various various 3 100000 digital files 2010 MC_activity Base spatial databases for report "Mining Claim Activity on Federal Land in the United States", By J. D. Causey A field, MTRS, was added to the PLS databases by concatenating meridian, township, range, and section information into one 18-character string. The string is in the format MM TTTTT RRRRR SSS where MM is a 2-digit number, TTTTT is township, RRRRR is range, and SSS is section for any valid Public Land Survey values. Township and range are 5 characters of the form XXXYZ where X is a numeric, Y is 0 or 2, and Z is N or S for township and E or W for range. A Y value of 2 means that the township or range are fractional township or ranges, otherwise the value is 0. Section is a 3-digit numeric. Then all fields except MTRS were deleted. All datasets were then projected to Geographic coordinate system, NAD83 datum. The spatial databases were attached to a list of unique MTRS values from the LR2000 database and all polygons that had a record in the LR2000 database were selected. This selection was saved as the present shapefile. 2011 J. D. Causey U.S. Geological Survey Geologist mailing and physical address

904 W. Riverside Ave., Rm 202

Spokane WA 99201-1087 USA 509.368.3116 509.368.3199 dcausey@usgs.gov Vector G-polygon 19384 0.001 0.001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 ak_pls_07, az_pls_10, ar_pls_10, ca_pls_10, co_pls_10, fl_pls_10, id_pls_10, mt_pls_10, ne_pls_10, nm_pls_10, nv_pls_10, or_pls_10, sd_pls_10, ut_pls_10, wa_pls_10, wy_pls_10 Shapefile names for spatial databases containing Public Land Survey sections with mining claims recorded in the U.S. Bureau of Land Management LR2000 database April 1, 2009 for contiguous 48 states. MC_activity MTRS A unique Public Land Survey System identifier (Meridian-Township-Range-Section concatenated value) MC_activity An 18-character string of numbers and letters U.S. Geological Survey Information Services mailing address

P.O. Box 25286

Denver CO 80225 USGS Data Series 290 The U.S. Geological Survey (USGS) provides these geographic data "as is." The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply such warranty. In no event shall the USGS have liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by the USGS. This spatial database is not meant to be used or displayed at any scale larger than 1:100,000 (for example, 1:24,000). Shapefile 1.0 PLS polygons with claim count and type in separate files unzip 41 megabytes http://pubs.usgs.gov/ds/2007/290/ds-290_data_version4.zip Comma-delimited text claim count, type, and disposition unzip 41 megabytes http://pubs.usgs.gov/ds/2007/290/ds-290_data_version4.zip None 20110707 J. D. Causey U.S. Geological Survey Geologist mailing and physical address

904 W. Riverside Ave, Rm 202

Spokane WA 99201-1087 USA 509.368.3116 509.368.3199 dcausey@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time