Eric B. Peterson, Nevada Natural Heritage Program March 31, 2006 1 raster digital data \\ECOLOGIST\Y$\MAPPING-PROJECTS\BRTE02-state\Final\GRID\angrinb angrinb Annual Grass Index (ANGRIN) derived from multitemporal Landsat 5 TM and MODIS Imagery with statistical models utilizing 806 training sites. Source imagery for northern aproximately 2/3 of the area is from 2004, the southern aproximately 1/3 from 2005. Statistical modeling attempted to estimate percent ground cover for each pixel, however accuracy analysis shows that higher-coverage areas were frequently underestimated. Thus the map is now considered an index rather than estimates of actual ground cover. Besides, ground cover varies from year to year, so a specific ground cover estimate has less meaning than the relative density patterns from one site to another. The focal area is the state of Nevada, however the statistical models were allowed to run beyond the border within the Landsat data footprint. A nodata value of -1 is used outside of that footprint and within that footprint west of the Sierra crest. These data are intended for use by land managers, to better understand patterns of annual grass invasion and prioritize management efforts. See Peterson (2006) "A map of invasive annual grasses in Nevada derived from multitemporal Landsat 5 TM imagery" Online report at http://heritage.nv.gov en 2004-2005 ground condition Complete Possible second version if alternative statistical methods succeed, completion date unknown -122.365148 -111.286786 43.045260 33.350413 62077.128000966467.6280003701365.8290004765840.829000 none annual grasses Bromus tectorum Bromus rubens Schismus barbatus none Reading of report (see Supplemental Information) is recommended for comprehension of accuracy. Eric B. Peterson Nevada Natural Heritage Program Vegetation Ecologist mailing and physical address

901 South Stewart Street, suite 5002

Carson City NV 89509 USA 775-684-2906 peterson@heritage.nv.gov Eric B. Peterson, Nevada Natural Heritage Program Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 1; ESRI ArcCatalog 9.1.0.722 Raster Dataset See Peterson (2006) "A map of invasive annual grasses in Nevada derived from multitemporal Landsat 5 TM imagery" Online report at http://heritage.nv.gov See Peterson (2006) "A map of invasive annual grasses in Nevada derived from multitemporal Landsat 5 TM imagery" Online report at http://heritage.nv.gov See Peterson (2006) "A map of invasive annual grasses in Nevada derived from multitemporal Landsat 5 TM imagery" Online report at http://heritage.nv.gov Landsat 5 TM source imagery was registered with 'terrain correction'. Processing may have added up to 30 m additional error. not applicable 100,000 Most of the data are derived from Landsat 28.5 m resolution imagery - these are generally considered appropriate for 1:100,000 scale mapping. See Peterson (2006) "A map of invasive annual grasses in Nevada derived from multitemporal Landsat 5 TM imagery" Online report at http://heritage.nv.gov 2005-2006 Metadata imported.C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\xml13F.tmp2006041217355700 Raster Grid Cell 37350 31733 1 28.50000028.50000016Upper LeftFALSEDefault1matrix valuesTRUEESRI GRID row and column 28.500000 28.500000 meters Universal Transverse Mercator110.999600-117.0000000.000000500000.0000000.000000 North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983NAD_1983_UTM_Zone_11N ANGRINb Table101 ObjectID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Value Count Downloadable Data, http://heritage.nv.gov The Nevada Natural Heritage Program provides no warrantee, explicit or implied. 285.054 285.054 none 20060412 REQUIRED: The organization responsible for the metadata information. REQUIRED: The person responsible for the metadata information. REQUIRED: The mailing and/or physical address for the organization or individual. REQUIRED: The city of the address. REQUIRED: The state or province of the address. REQUIRED: The ZIP or other postal code of the address. REQUIRED: The telephone number by which individuals can speak to the organization or individual. FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile enhttp://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile {2494BB43-F348-43C9-A061-ECE62C0EE663}2006041217355700FALSE20060412173557002006041217435900Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 1; ESRI ArcCatalog 9.1.0.722angrinb62077.128966467.6284765840.8293701365.8291-122.365148-111.28678643.0452633.3504131ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset002file://\\ECOLOGIST\Y$\MAPPING-PROJECTS\BRTE02-state\Final\GRID\angrinbLocal Area Network285.054Raster DatasetNAD_1983_UTM_Zone_11N213173328.5Meter1 Meter = 1 Meter(s)3735028.5Meter1 Meter = 1 Meter(s)20060412