BLM and USGS20020101BLM OR Quads 1:63,360 (30-Minute) Polygonvector digital dataquads30mhttp://www.blm.gov/or/gis/data.phpQUADS30M_POLY: This theme shows the 1:63,360 quadrangles (30 Minute Quads) 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 PlanningBLM (Bureau of Land Management), USGS (United States Geological Survey), GNIS (Geographical Names Information System), NGNDB (National Geographic Names DataBase) As described in the process steps these data were created on a regular grid of latitude/longitude to depict the 1:63,360 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.20020101publication dateUnknown-125-1164941NoneLandsindexFrameworkBase DataQuadranglesISO 19115imageryBaseMapsEarthCoverBLMManagementBLM-StateWashingtonOregonPUBLIC DATA: None, these data are considered public domain.These data are provided by Bureau of Land Management (BLM) “as is” and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User’s intended use. The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived, and both scale and accuracy may vary across the data set. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. These data are neither legal documents nor land surveys, and must not be used as such. Official records may be referenced at most BLM offices. Please report any errors in the data to the BLM office from which it was obtained. The BLM should be cited as the data source in any products derived from these data. Any Users wishing to modify the data should describe the types of modifications they have performed. The User should not misrepresent the data, nor imply that changes made were approved or endorsed by BLM. This data may be updated by the BLM without notification.Bureau of Land ManagementCorey PlankLead Cartographermailing
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PortlandOR97201US(503) firstname.lastname@example.orgArc/Info, AIX/UNIX --------------------------------------------------------------------------------The Ohio codes were generated based on the latitude/longitude of the SE corner of the polygon. The common names were attributed from one of four sources if the quad covered some portion of Oregon. From an existing, or once used, USGS Map name. From an existing, or once used, BLM map name. For the 100k map that covers the same area. For the 7.5 minute map that covers the same area. Source for the map name is noted in the SOURCE attribute.This theme was created by generating the lines at a .500 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. Only quads covering Oregon are attributed with common names.UnknownUnknownUSGS19940501USGS 7.5 Minute Quadrangles24000hardcopyPaperunknown19940501unknownpublication dateUSGS Map NameAttributesUSGS19980301National Geographic Names DataBaseNoneUSGS NGNDBAttributesBLM20020101BLM QUADS30monLine20020101publication dateBLM QUADS30mLinesThis coverage was generated in Arc/Info using a computer program that created the polygons at 30-minute intervals of latitude and longitude. Another computer program used the latitude/longitude of the SE corner of the polygons to calculate their Ohio codes. The GNIS NGNDB was related to the Ohio codes to populate the common names field. GNIS NGNDB was compared to a USGS maps, and where quad names disagreed, the name from the USGS map populated the name field. The BLM archives were search for 30-minute series maps. Where they found the name of those maps, they were used to populate the name field. Where no USGS or BLM map was found, names of the 100k USGS map series were use to populate a quad name. When two quads required names only the quad that covered the feature for which the 100k map was named by was named using that name. For those remaining the name of one 7.5 Minute map within the polygon boundary was use to populate the name field.20000401Oregon WashingtonVectorGT-polygon composed of chains3242e-0082e-008Decimal DegreesD North American 1983GRS 19806378137.0298.25722210130-Minute Quad PolygonsPolygons at intervals of 30 Minutes of latitude and longitudeBLMobjectidInternal feature number.ESRISequential unique whole numbers that are automatically generated.q30The USGS Ohio code for the 30-minute quad, with the row/column coding listed first.BLMname_A name up to 30 characters long. This will be the most current name given to a 30M quad, as determined by the source of the name.BLMsourcesource of the name for the quad.100K100k Name usedName from nearest USGS 100k map used15M15M Name usedName from nearest 15M USGS map used7.5M7.5M Name usedName from nearest 7.5M USGS mape usedNullNo Name usedNo name assignedExistingExisting Name usedName from existing 30M map usedshapeFeature geometry.ESRICoordinates defining the features.SHAPE.AREASHAPE.LENThe format of the quad code, in attribute q30, is translated from the format typically provided by USGS. Translation is required for use in many database programs (e.g. Informix, Oracle) because often, when dealing with a character field, the database program will not accept a numeral in the first space.
--------------------------------------------------------------------------------Bureau of Land ManagementEric HiebenthalGIS Data Management Specialistmailing
P.O Box 2965
PortlandOR97208US503email@example.com instructionsDownloadable DataThe BLM assumes no responsibility for errors or omissions. No warranty is made by the BLM as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data; nor shall the act of distribution to contractors, partners, or beyond, constitute any such warranty for individual or aggregate data use with other data. Although these data have been processed successfully on computers of BLM, no warranty, expressed or implied, is made by BLM regarding the use of these data on any other system, or for general or scientific purposes, nor does the fact of distribution constitute or imply any such warranty. In no event shall the BLM have any 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 the use or reliance on the geographic data or arising out of the delivery, installation, operation, or support by BLM.Contact distributor.Data are only available through the Oregon/Washington State office of the Bureau of Land Management.2003010120141114Bureau of Land Management, Oregon State OfficeRoger MillsGIS Specialistmailing
P.O. Box 2965
PortlandOR97208US(503) 808-6340tdd/tty phone(503) firstname.lastname@example.org:00-4:00NoneFGDC Content Standard for Digital Geospatial MetadataFGDC-STD-001-1998local time