. .

U.S. DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

Oregon / Washington

GIS Metadata


<?xml version="1.0"?>
<metadata>
  <idinfo>
    <citation>
      <citeinfo>
        <origin>Bureau of Land Management, Oregon State Office</origin>
        <pubdate>20150202</pubdate>
        <title>BLM OR Aerial Photography Centers Point</title>
        <geoform>vector digital data</geoform>
        <onlink>http://www.blm.gov/or/gis/data.php</onlink>
      </citeinfo>
    </citation>
    <descript>
      <abstract>ap_centers_point: This point dataset depicts the centers of the photo frames for aerial photography taken over BLM Lands in the states of Oregon and Washington.</abstract>
      <purpose>This feature class is intended to facilitate the location and identification of BLM aerial imagery in Oregon and Washington for release to BLM district personnel, other agencies and the general public. This theme can be used to search and display photo locations as well as for the creation of flight index maps.</purpose>
    </descript>
    <timeperd>
      <timeinfo>
        <sngdate>
          <caldate>20150202</caldate>
        </sngdate>
      </timeinfo>
      <current>publication date</current>
    </timeperd>
    <status>
      <progress>Complete</progress>
      <update>As needed</update>
    </status>
    <spdom>
      <bounding>
        <westbc>-124.594198</westbc>
        <eastbc>-116.467820</eastbc>
        <northbc>49.006723</northbc>
        <southbc>41.838188</southbc>
      </bounding>
    </spdom>
    <keywords>
      <theme>
        <themekt>BLM</themekt>
        <themekey>Management</themekey>
        <themekey>Geophysical</themekey>
      </theme>
      <theme>
        <themekt>ISO 19115</themekt>
        <themekey>imageryBaseMapsEarthCover</themekey>
      </theme>
      <theme>
        <themekt>None</themekt>
        <themekey>Aerial Photography</themekey>
        <themekey>Land Use Planning</themekey>
        <themekey>Centers</themekey>
      </theme>
      <theme>
        <themekt>ISO 19115 Topic Categories</themekt>
        <themekey>imageryBaseMapsEarthCover</themekey>
      </theme>
      <place>
        <placekt>BLM-State</placekt>
        <placekey>Oregon</placekey>
        <placekey>Washington</placekey>
      </place>
    </keywords>
    <accconst>PUBLIC DATA: None, these data are considered public domain.</accconst>
    <useconst>These data are provided by Bureau of Land Management (BLM) &#x201C;as is&#x201D; 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&#x2019;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.</useconst>
    <ptcontac>
      <cntinfo>
        <cntorgp>
          <cntorg>Bureau of Land Management</cntorg>
          <cntper>Corey Plank</cntper>
        </cntorgp>
        <cntpos>Lead Cartographer</cntpos>
        <cntaddr>
          <addrtype>mailing</addrtype>
          <address>P.O. Box 2965</address>
          <city>Portland</city>
          <state>OR</state>
          <postal>97201</postal>
          <country>US</country>
        </cntaddr>
        <cntvoice>(503) 808-6427</cntvoice>
        <cntemail>cplank@blm.gov</cntemail>
      </cntinfo>
    </ptcontac>
    <native>Microsoft Windows 7.0; ESRI ArcCatalog 10.2</native>
    <crossref>
      <citeinfo>
        <origin>Bureau of Land Management, Oregon State Office</origin>
        <pubdate>20100101</pubdate>
        <title>BLM OR Aerial Photography Flightlines Line</title>
        <onlink>http://www.blm.gov/or/gis/data.php</onlink>
      </citeinfo>
    </crossref>
    <crossref>
      <citeinfo>
        <origin>Bureau of Land Management, Oregon State Office</origin>
        <pubdate>20100101</pubdate>
        <title>BLM OR Aerial Photography Boundaries Polygon</title>
        <onlink>http://www.blm.gov/or/gis/data.php</onlink>
      </citeinfo>
    </crossref>
  </idinfo>
  <dataqual>
    <posacc>
      <horizpa>
        <horizpar>90% of the centerpoints are within 400 feet of their actual position.</horizpar>
        <qhorizpa>
          <horizpae>Based on an estimate of the amount of error expected in eyeballing and digitizing.</horizpae>
        </qhorizpa>
      </horizpa>
      <vertacc>
        <vertaccr>Not applicable.</vertaccr>
      </vertacc>
    </posacc>
    <lineage>
      <procstep>
        <procdesc>Corrected photo location information and added additional points</procdesc>
        <procdate>not complete</procdate>
        <proccont>
          <cntinfo>
            <cntorgp>
              <cntorg>BLM Oregon State Office</cntorg>
              <cntper>Corey Plank</cntper>
            </cntorgp>
            <cntpos>Lead Cartographer</cntpos>
            <cntaddr>
              <addrtype>mailing</addrtype>
              <address>PO Box 2965</address>
              <city>Portland</city>
              <state>OR</state>
              <postal>97208-2965</postal>
              <country>US</country>
            </cntaddr>
            <cntvoice>503-808-6145</cntvoice>
            <cntfax>503-808-6190</cntfax>
            <cntemail>cplank@blm.gov</cntemail>
          </cntinfo>
        </proccont>
      </procstep>
      <procstep>
        <procdesc>This point data was captured by the contractor who flew the project area, or by BLM Oregon/Washington State Office employees. The photos were examined and a centerpoint of each frame was located on a mylar or paper map. The map is used as an index to the project. A BLM employee scanned the index map at 300 dots per inch and then geo-registered the scanned index. The employee digitized the photocenter points in ArcMap, sometimes every point and sometimes every fifth point. The Type attribute indicates whether the point was individually located or located by a script that interpolated points in between the fifth points. The feature class has two attribute fields indicating which point locations were interpolated.</procdesc>
        <srcused>Scanned Lat Lon</srcused>
        <procdate>unknown</procdate>
        <proccont>
          <cntinfo>
            <cntorgp>
              <cntorg>Bureau of Land Management</cntorg>
              <cntper>Susan Nelson</cntper>
            </cntorgp>
            <cntpos>Cartographer/Remote Sensing Acquisition</cntpos>
            <cntaddr>
              <addrtype>mailing</addrtype>
              <address>P.O. Box 2965</address>
              <city>Portland</city>
              <state>OR</state>
              <postal>97204</postal>
              <country>US</country>
            </cntaddr>
            <cntvoice>(503) 808-6139</cntvoice>
            <cntemail>s1nelson@blm.gov</cntemail>
          </cntinfo>
        </proccont>
      </procstep>
      <procstep>
        <procdesc>Individual project data were aggregated into this feature class. Field names were standardized (given common names). Data was projected to GCS North American 1983 Datum.</procdesc>
        <procdate>20120423</procdate>
        <proccont>
          <cntinfo>
            <cntorgp>
              <cntorg>Bureau of Land Management, Oregon State Office</cntorg>
              <cntper>Eric Hiebenthal</cntper>
            </cntorgp>
            <cntpos>GIS Data Management Specialist</cntpos>
            <cntaddr>
              <addrtype>mailing</addrtype>
              <address>P.O. Box 2965</address>
              <city>Portland</city>
              <state>OR</state>
              <postal>97208</postal>
              <country>US</country>
            </cntaddr>
            <cntvoice>503-808-6565</cntvoice>
            <cntfax>503-808-6419</cntfax>
            <cntemail>ehiebent@blm.gov</cntemail>
          </cntinfo>
        </proccont>
      </procstep>
      <procstep>
        <procdesc>Added additional photo locations.</procdesc>
        <procdate>20131220</procdate>
        <proccont>
          <cntinfo>
            <cntorgp>
              <cntorg>USDI Bureau of Land Management</cntorg>
              <cntper>Corey Plank</cntper>
            </cntorgp>
            <cntpos>Lead Cartographer - Remote Sensing</cntpos>
            <cntaddr>
              <addrtype>mailing</addrtype>
              <address>PO Box 2965</address>
              <city>Portland</city>
              <state>OR</state>
              <postal>97208-2965</postal>
              <country>US</country>
            </cntaddr>
            <cntvoice>503-80-6145</cntvoice>
            <cntemail>cplank@blm.gov</cntemail>
          </cntinfo>
        </proccont>
      </procstep>
    </lineage>
  </dataqual>
  <spdoinfo>
    <direct>Vector</direct>
    <ptvctinf>
      <sdtsterm>
        <sdtstype>Entity point</sdtstype>
        <ptvctcnt>365954</ptvctcnt>
      </sdtsterm>
      <sdtsterm>
        <sdtstype>Entity point</sdtstype>
        <ptvctcnt>365954</ptvctcnt>
      </sdtsterm>
    </ptvctinf>
  </spdoinfo>
  <spref>
    <horizsys>
      <geograph>
        <latres>2.0000000000000001e-009</latres>
        <longres>2.0000000000000001e-009</longres>
        <geogunit>Decimal Degrees</geogunit>
      </geograph>
      <geodetic>
        <horizdn>D North American 1983</horizdn>
        <ellips>GRS 1980</ellips>
        <semiaxis>6378137.0</semiaxis>
        <denflat>298.257222101</denflat>
      </geodetic>
    </horizsys>
  </spref>
  <eainfo>
    <detailed>
      <enttyp>
        <enttypl>AP_centers_point</enttypl>
      </enttyp>
      <attr>
        <attrlabl>OBJECTID</attrlabl>
        <attrdef>Internal feature number.</attrdef>
        <attrdefs>ESRI</attrdefs>
        <attrdomv>
          <udom>Sequential unique whole numbers that are automatically generated.</udom>
        </attrdomv>
      </attr>
      <attr>
        <attrlabl>Shape</attrlabl>
        <attrdef>Feature geometry.</attrdef>
        <attrdefs>ESRI</attrdefs>
        <attrdomv>
          <udom>Coordinates defining the features.</udom>
        </attrdomv>
      </attr>
      <attr>
        <attrlabl>Roll</attrlabl>
        <attrdef>Number assigned to the film roll.</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>Flight</attrlabl>
        <attrdef>The number assigned to the flight line.  Historically, R was used for reflights, G was used for Gap flights.  Flightline segments, after 1998, were numbered with decimals (14.0, 14.1, 14.2, etc.).</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>Exposure</attrlabl>
        <attrdef>Number assigned to each frame of photos.</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>Sub_Exposure</attrlabl>
        <attrdef>Letters assigned to each frame of photos in addition to numbers.</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>LabelPC</attrlabl>
        <attrdef>Compilation of Roll, Flight, Exposure, and Sub_Exposure</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>PhotoDate</attrlabl>
        <attrdef>Date photos within a flight line were flown, if available.</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>PhotoTime</attrlabl>
        <attrdef>Time (Pacific Standard) photos were taken within a flight line, if available.  In the case of more recent projects, the time recorded is the time the flight line was completed.  For instance, the flight starts at 12:51 and ends at 12:43, then 12:51 is recorded as the PhotoTime.</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>Proj_name</attrlabl>
        <attrdef>Project code used as a unique identifier.</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>District</attrlabl>
        <attrdef>BLM District project is located within.</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>Quad_Name</attrlabl>
        <attrdef>USGS Quadrangle Name</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>Resource_Area</attrlabl>
        <attrdef>BLM Resource Management Area Name</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>Rec_site</attrlabl>
        <attrdef>Recreation Site name </attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>Photo_Location</attrlabl>
        <attrdef>Scanned image path and name</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>POINT_X</attrlabl>
        <attrdef>Longitude of approximate center of the image.</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
      <attr>
        <attrlabl>TYPE</attrlabl>
      </attr>
      <attr>
        <attrlabl>POINT_Y</attrlabl>
        <attrdef>Latitude of approximate center of the image.</attrdef>
        <attrdefs>BLM</attrdefs>
      </attr>
    </detailed>
    <overview>
      <eadetcit>Individual photo centers are in a point feature class, created from digital files.  

Since 2001, contractors have collected GPS photo centers at the instant of exposure and provided them in digital form.  Where GPS obtained photo centers were not available, BLM scanned mylar or paper indexes and registered them to a projection before digitizing the photo centers.  In some cases, BLM digitized every fifth photo center and allowed a software program to interpolate the positions of the photo centers in between.  Those photo points are identified as "I" in the "Type" field of the attributes.

Although BLM cannot verify, in each individual case, how historical indexes were made, it is presumed that the contractor who flew the photography identified the photo center positions and marked them on a mylar or paper map.</eadetcit>
    </overview>
  </eainfo>
  <distinfo>
    <distrib>
      <cntinfo>
        <cntorgp>
          <cntorg>Bureau of Land Management</cntorg>
          <cntper>Eric Hiebenthal</cntper>
        </cntorgp>
        <cntpos>GIS Data Management Specialist</cntpos>
        <cntaddr>
          <addrtype>mailing</addrtype>
          <address>P.O Box 2965</address>
          <city>Portland</city>
          <state>OR</state>
          <postal>97208</postal>
          <country>US</country>
        </cntaddr>
        <cntvoice>503-808-6340</cntvoice>
        <cntfax>503-808-6419</cntfax>
        <cntemail>ehiebent@blm.gov</cntemail>
        <cntinst>contact instructions</cntinst>
      </cntinfo>
    </distrib>
    <resdesc>Downloadable Data</resdesc>
    <distliab>The 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.</distliab>
    <stdorder>
      <fees>Contact distributor.</fees>
      <ordering>Data are only available through the Oregon/Washington State office of the Bureau of Land Management.</ordering>
    </stdorder>
  </distinfo>
  <metainfo>
    <metd>20120503</metd>
    <metrd>20150202</metrd>
    <metc>
      <cntinfo>
        <cntorgp>
          <cntorg>Bureau of Land Management, Oregon State Office</cntorg>
          <cntper>Roger Mills</cntper>
        </cntorgp>
        <cntpos>GIS Specialist</cntpos>
        <cntaddr>
          <addrtype>mailing</addrtype>
          <address>P.O. Box 2965</address>
          <city>Portland</city>
          <state>OR</state>
          <postal>97208</postal>
          <country>US</country>
        </cntaddr>
        <cntvoice>(503) 808-6340</cntvoice>
        <cnttdd>tdd/tty phone</cnttdd>
        <cntfax>(503) 808-6419</cntfax>
        <cntemail>r2mills@blm.gov</cntemail>
        <hours>8:00-4:00</hours>
        <cntinst>None</cntinst>
      </cntinfo>
    </metc>
    <metstdn>FGDC Content Standard for Digital Geospatial Metadata</metstdn>
    <metstdv>FGDC-STD-001-1998</metstdv>
    <mettc>local time</mettc>
    <metsi>
      <metscs>Not Classified</metscs>
    </metsi>
  </metainfo>
</metadata>