BLM 2005 OR/WA Quads60 vector digital data Portland, OR OR BLM This theme shows the One Degree by One degree blocks for Oregon and Washington as defined in North American Datum 1927 (NAD27). These quads show the approximate extent of and align with the NAD27 corner ticks as displayed on USGS Topoquads. Resource Management Planning BLM (Bureau of Land Management) As described in the process steps these data were created on a regular grid of latitude/longitude to depict the one degree quadrangles covering Oregon and Washington and the surrounding areas as defined in North American Datum 1927 (NAD27). Due to the fact the dataset was originally created in NAD27 the values of coordinates defining the corners of the quads will only be those of the definition in the original datum. Once data is projected to a different datum the values will be correctly modified mathematically to reflect the change to the new projection. These quads show the approximate extent of the USGS topographic quadrangles. Since this data is constructed from corner points with straight lines connecting the corners, it does not take into account the curve between corner points introduced by the use of the UTM projection used to produce the topoquad maps. Thus this dataset is only a depiction of the extent of the topoquad. The corners of each of these quadrangles should align with the NAD27 ticks displayed on USGS topoquads in any projection used. 2005 publication date Complete Unknown -125 -116 49 41 None Base Data Lands Quadrangles ISO 19115 boundaries BLM-State Oregon Washington Discretionary, contains no sensitive information - generally considered releasable. None. Mary Hartel Bureau of Land Management, OR/WA State Office Chief - Branch of Geographic Sciences mailing address
P.O. Box 2965
Portland OR 97208 USA (503) 808-6131 503-808-6190 mhartel@blm.gov 8am - 5pm Arc/Info, AIX/UNIX The One degree codes were generated based on the latitude/longitude of the SE corner of the polygon The One degree codes (ONEDEGREE) visually checked for accuracy. This theme was created by generating the lines at a 1 degree interval. There are no node errors or open polygons. This theme was built with polygon topology. The original defined datum is NAD27. This theme covers all lands in Oregon and Washington as well as parts of California, Nevada, Idaho, British Columbia, Alberta and the Pacific Ocean. Unknown Unknown BLM 2002 BLM QUADS60 computer program 2002 publication date BLM QUADS60 Lines The source coverage was generated in Arc/Info using a computer program that created the polygons at 1-degree interval of latitude and longitude. Another computer program used the latitude/longitude of the SE corner of the polygons to calculate their One degree codes. 199910 Unknown None Vector G-polygon 81 0.000000001 0.000000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137 298.257 1-degree Quad Polygons Polygons at intervals of 1 degree of latitude and longitude BLM objectid Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. onedegree The Latitude and longitude of the quad. BLM One degree code for the quad; for example, 45120 (in which the 45 is the latitude, 120 the longitude of the southeast corner of a one degree by one degree block). shape Feature geometry. ESRI Coordinates defining the features. There is one attribute, a description of the southeast corner of each polygon. Eric Hiebenthal Bureau of Land Management/Northrop Grumman Data Administration Supervisor mailing address
P.O. Box 2965
Portland OR 97208 USA 503-808-6565 503-808-6374 ehiebent@blm.gov 7:30 a.m. to 4:00 p.m. Downloadable Data No warranty is made by the Bureau of Land Management as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data. Contact distributor. Data are only available through the Oregon/Washington State office of the Bureau of Land Management. 20050413 20080206 Stanley Frazier Bureau of Land Management, Oregon State Office State Data Administrator mailing address
P.O. Box 2965
Portland OR 97208 USA (503)808-6009 (503)808-6419 sfrazier@blm.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time