<?xml version="1.0" encoding="utf-8"?>
<metadata>
  <idinfo>
    <citation>
      <citeinfo>
        <origin>Oregon Department of Geology and Mineral Industries</origin>
        <pubdate>2026</pubdate>
        <title>Large Format Maps, Oregon.</title>
        <geoform>tabular digital data</geoform>
        <serinfo>
          <sername>Oregon Department of Geology and Mineral Industries Digital Data</sername>
          <issue>MILO-4</issue>
        </serinfo>
        <pubinfo>
          <pubplace>Portland, Oregon, USA</pubplace>
          <publish>Oregon Department of Geology and Mineral Industries</publish>
        </pubinfo>
        <onlink>https://www.oregon.gov/dogami/pages/default.aspx</onlink>
        <lworkcit>
          <citeinfo>
            <origin>Oregon Department of Geology and Mineral Industries</origin>
            <pubdate>2026</pubdate>
            <title>Mineral Information Layer for Oregon-Release 4 (MILO-4)</title>
            <edition>Release 4</edition>
            <serinfo>
              <sername>Oregon Department of Geology and Mineral Industries Digital Data</sername>
              <issue>MILO-4</issue>
            </serinfo>
            <pubinfo>
              <pubplace>Portland, Oregon, USA</pubplace>
              <publish>Oregon Department of Geology and Mineral Industries</publish>
            </pubinfo>
            <onlink>https://www.oregon.gov/dogami/pages/default.aspx</onlink>
          </citeinfo>
        </lworkcit>
      </citeinfo>
    </citation>
    <descript>
      <abstract>The Mineral Information Layer for Oregon-Release 4 (MILO-Release 4) is a geospatial database that stores and manages information regarding Oregon's mineral occurrences, prospects, and mines; it is the primary way in which the State extracts, researches, and displays its available historical mining and mineral resource information. The Large Format Maps table houses the hyperlinks to maps in Adobe Portable Document Format (PDF) and relates them with specific mine sites as well as document title and dates. Understand that recreation in or around inactive mine sites is extremely dangerous, and can result in serious injury or death. Stay out and stay alive!</abstract>
      <purpose>The purpose of this MILO-Release 4 is for use as reference material supporting local- to statewide-scale mineral resource and environmental assessments. These data provide a searchable catalogue with links to supporting digital documentation that allows users to extract, research, and display historical mining and mineral resource information.</purpose>
    </descript>
    <timeperd>
      <timeinfo>
        <sngdate>
          <caldate>08/01/1991-08/31/2024</caldate>
        </sngdate>
      </timeinfo>
    </timeperd>
    <status>
      <progress>Planned</progress>
      <update>Biennial</update>
    </status>
    <keywords>
      <theme>
        <themekt>ISO 19115 Topic Category</themekt>
        <themekey>geoscientificinformation</themekey>
      </theme>
      <theme>
        <themekt>Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus</themekt>
        <themekey>stone</themekey>
        <themekey>metallic mineral</themekey>
        <themekey>industrial mineral</themekey>
        <themekey>mineral resource</themekey>
        <themekey>zeolite</themekey>
        <themekey>sand and gravel</themekey>
      </theme>
      <theme>
        <themekt>USGS Thesaurus</themekt>
        <themekey>geospatial datasets</themekey>
        <themekey>hazards</themekey>
        <themekey>hazard preparedness</themekey>
        <themekey>scientific interpretation</themekey>
        <themekey>time series datasets</themekey>
      </theme>
      <theme>
        <themekt>Custom</themekt>
        <themekey>MILO (Mineral Information Layer for Oregon)</themekey>
        <themekey>Mine</themekey>
        <themekey>Mineral fuel</themekey>
        <themekey>Aggregate</themekey>
        <themekey>Gemstone</themekey>
        <themekey>Borrow Pit</themekey>
        <themekey>Prospect</themekey>
        <themekey>Quarry</themekey>
        <themekey>Gravel Pit</themekey>
        <themekey>Mineral Occurrence</themekey>
      </theme>
      <place>
        <placekt>Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus</placekt>
        <placekey>United States</placekey>
        <placekey>North America</placekey>
        <placekey>Oregon</placekey>
        <placekey>Baker</placekey>
        <placekey>Benton</placekey>
        <placekey>Clackamas</placekey>
        <placekey>Clatsop</placekey>
        <placekey>Columbia</placekey>
        <placekey>Coos</placekey>
        <placekey>Crook</placekey>
        <placekey>Curry</placekey>
        <placekey>Deschutes</placekey>
        <placekey>Douglas</placekey>
        <placekey>Gilliam</placekey>
        <placekey>Grant</placekey>
        <placekey>Harney</placekey>
        <placekey>Hood River</placekey>
        <placekey>Jackson</placekey>
        <placekey>Jefferson</placekey>
        <placekey>Josephine</placekey>
        <placekey>Klamath</placekey>
        <placekey>Lake</placekey>
        <placekey>Lane</placekey>
        <placekey>Lincoln</placekey>
        <placekey>Linn</placekey>
        <placekey>Malheur</placekey>
        <placekey>Marion</placekey>
        <placekey>Morrow</placekey>
        <placekey>Multnomah</placekey>
        <placekey>Polk</placekey>
        <placekey>Sherman</placekey>
        <placekey>Tillamook</placekey>
        <placekey>Umatilla</placekey>
        <placekey>Union</placekey>
        <placekey>Wallowa</placekey>
        <placekey>Wasco</placekey>
        <placekey>Washington</placekey>
        <placekey>Wheeler</placekey>
        <placekey>Yamhill</placekey>
      </place>
    </keywords>
    <accconst>None</accconst>
    <useconst>REPORT DATA: This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information. This publication cannot substitute for site-specific investigations by qualified practitioners. Site-specific data may give results that differ from the results shown in the publication. See the accompanying text report for more details on the limitations of the methods and data used to prepare this publication.</useconst>
    <ptcontac>
      <cntinfo>
        <cntorgp>
          <cntorg>Oregon Department of Geology and Mineral Industries </cntorg>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing and physical address</addrtype>
          <address>800 NE Oregon Street Suite 965</address>
          <city>Portland</city>
          <state>Oregon</state>
          <postal>97232</postal>
          <country>USA</country>
        </cntaddr>
        <cntvoice>1 971 673 1555</cntvoice>
        <cntfax>1 971 673 1562</cntfax>
        <cntemail>dogami-info@dogami.oregon.gov</cntemail>
        <cntinst>When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from https://www.oregon.gov/dogami/pages/default.aspx</cntinst>
      </cntinfo>
      <cntinfo>
        <cntperp>
          <cntper>Carlie J.M. Azzopardi</cntper>
          <cntorg>Oregon Department of Geology and Mineral Industries</cntorg>
        </cntperp>
      </cntinfo>
    </ptcontac>
    <datacred>This update and release of MILO-4 was supported through a grant from the National Geological and Geophysical Data Preservation Program (NGGDPP) under cooperative agreement number G23AP00218-01 (2023). Additional funds were provided by the State of Oregon.</datacred>
    <secinfo>
      <secclass>Unclassified</secclass>
    </secinfo>
  </idinfo>
  <dataqual>
    <attracc>
      <attraccr>Attribute accuracy is tested by manual comparison of the source and hard copy scans. The detail level (e.g. Title) of the source material and interpretation procedures for capturing that source affect the quality of the data. Fields that do not contain applicable attributes were left blank. Field checking of the data was not performed.</attraccr>
    </attracc>
    <logic>Due to the many to many relationship some scans my be repeated, and/or some MILO points may be repeated. However no duplicated features exist although individual features may share some of the same attribute(s), but have differences in unique identifiers. Some documents are duplicated due to varying degrees in quality of scans, but each scan has it's own unique identification.  Because the data were collected and reported by numerous people, the descriptions provided are not highly consistent in structure or terminology or similar characteristics may be described differently.</logic>
    <complete>Attribution of the database is generally sparse, meaning that not all fields are attributed. These data are scans of the literature originally found in DOGAMI published and unpublished hardcopy holdings in the Portland and Grants Pass offices, some documents may not have been included. The tabular data are presented in the form of rows representing the relationship of the map to a specific MILO point. For additional maps outside the State of Oregon please contact the Oregon Department of Geology and Mineral Industries at dogami-info@oregon.gov</complete>
    <lineage>
      <srcinfo>
        <srccite>
          <citeinfo>
            <origin>Oregon Department of Geology and Mineral Industries</origin>
            <pubdate>2020</pubdate>
            <title>Mineral Information Layer for Oregon, Release 3 [MILO-3]</title>
            <edition>Release 3</edition>
            <geoform>vector digital data</geoform>
            <serinfo>
              <sername>Oregon Department of Geology and Mineral Industries Digital Data</sername>
              <issue>MILO-3</issue>
            </serinfo>
            <pubinfo>
              <pubplace>Portland, Oregon</pubplace>
              <publish>Oregon Department of Geology and Mineral Industries</publish>
            </pubinfo>
            <othercit>McClaughry, J.D., Niewendorp, C.A., Franczyk, J. J., Duda, C. J. M., and Madin, I. P., 2020, Mineral Information Layer for Oregon, release 3 [MILO-3]: Oregon Department of Geology and Mineral Industries Digital Data Series MILO-3, Esri geodatabase. Superseded by DOGAMI MILO, release 4.</othercit>
            <onlink>https://pubs.oregon.gov/dogami/dds/p-MILO-3.htm</onlink>
          </citeinfo>
        </srccite>
        <typesrc>online</typesrc>
        <srctime>
          <timeinfo>
            <sngdate>
              <caldate>2020</caldate>
            </sngdate>
          </timeinfo>
          <srccurr>publication</srccurr>
        </srctime>
        <srccitea>MILO3</srccitea>
      </srcinfo>
      <srcinfo>
        <srccite>
          <citeinfo>
            <origin>Oregon Department of Geology and Mineral Industries</origin>
            <pubdate>2014</pubdate>
            <title>Large-Format Mine Maps - Index</title>
            <geoform>tabular digital data</geoform>
            <pubinfo>
              <pubplace>Portland, Oregon</pubplace>
              <publish>Oregon Department of Geology and Mineral Industries</publish>
            </pubinfo>
            <othercit>Grey literature. Scanning of documents done by National Mine Map Repository (NMMR) at the Office of Surface Mining Reclamation and Enforcement, 3 Parkway Center, Pittsburgh, PA 15220</othercit>
            <onlink>https://www.oregon.gov/dogami/milo/Pages/index-minemaps.aspx</onlink>
          </citeinfo>
        </srccite>
        <typesrc>online</typesrc>
        <srctime>
          <timeinfo>
            <sngdate>
              <caldate>20191028</caldate>
            </sngdate>
          </timeinfo>
          <srccurr>updated</srccurr>
        </srctime>
        <srccitea>Large Maps</srccitea>
      </srcinfo>
      <procstep>
        <procdesc>DOGAMI updated MILO's file structure in the MILO-3 update to adhere to the Geologic Map Schema (GeMS), designed by the U.S. Geological Survey. The schema can be found here (https://ngmdb.usgs.gov/Info/standards/GeMS/).
Matching large-format maps to specific MILO mine points was accomplished by geospatially examining the proximity of map points versus mine points, then comparing mine names in MILO with mine names displayed on large-format maps. A level of certainty code based on proximity, map scale, and other characteristics was established. Each map was assigned a code by matching the description of level of certainty. </procdesc>
        <srcused>Large Maps</srcused>
        <proccont>
          <cntinfo>
            <cntorgp>
              <cntorg>Oregon Department of Geology and Mineral Industries</cntorg>
            </cntorgp>
            <cntaddr>
              <addrtype>mailing and physical address</addrtype>
              <address>800 NE Oregon Street Suite 965</address>
              <city>Portland</city>
              <state>Oregon</state>
              <postal>97232</postal>
              <country>USA</country>
            </cntaddr>
            <cntvoice>1 971 673 1555</cntvoice>
            <cntfax>1 971 673 1562</cntfax>
            <cntemail>dogami-info@dogami.oregon.gov</cntemail>
            <cntinst>When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from https://www.oregon.gov/dogami/pages/default.aspx</cntinst>
          </cntinfo>
        </proccont>
      </procstep>
    </lineage>
  </dataqual>
  <eainfo>
    <detailed>
      <enttyp>
        <enttypl>LargeFormatMaps</enttypl>
      </enttyp>
      <attr>
        <attrlabl>Title</attrlabl>
        <attrdef>Title of scanned document</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>LargeFormatMap_ID</attrlabl>
        <attrdef>Primary key. Values =B0001, B0002, B0003, etc. Values may be repeated in the data set.</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Hyperlink</attrlabl>
        <attrdef>Hyperlink to the online document.</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Scale</attrlabl>
        <attrdef>Scale of the map listed by the author reported as 1 : denominator.</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Year</attrlabl>
        <attrdef>Year the document was published or created.</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
    </detailed>
    <overview>
      <eaover>The Large Format Maps table houses the hyperlinks to maps in Adobe Portable Document Format (PDF) and relates them with specific mine sites as well as document title and dates.</eaover>
    </overview>
  </eainfo>
  <distinfo>
    <distrib>
      <cntinfo>
        <cntorgp>
          <cntorg>Oregon Department of Geology and Mineral Industries</cntorg>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing and physical address</addrtype>
          <address>800 NE Oregon Street Suite 965</address>
          <city>Portland</city>
          <state>Oregon</state>
          <postal>97232</postal>
          <country>USA</country>
        </cntaddr>
        <cntvoice>1 971 673 1555</cntvoice>
        <cntfax>1 971 673 1562</cntfax>
        <cntemail>dogami-info@dogami.oregon.gov</cntemail>
        <cntinst>When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from https://www.oregon.gov/dogami/pages/default.aspx</cntinst>
      </cntinfo>
    </distrib>
    <distliab>Although these data have been processed successfully on a computer system at the Oregon Department of Geology and Mineral Industries, no warranty expressed or implied is made by DOGAMI regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty.</distliab>
    <stdorder>
      <digform>
        <digtinfo>
          <formname>"GDB" Esri File Geodatabase</formname>
        </digtinfo>
      </digform>
    </stdorder>
    <availabl>
      <timeinfo>
        <sngdate>
          <caldate>08/01/1991-08/31/2024</caldate>
        </sngdate>
      </timeinfo>
    </availabl>
  </distinfo>
  <metainfo>
    <metd>2024-08-31 00:00:00</metd>
    <metc>
      <cntinfo>
        <cntorgp>
          <cntorg>Oregon Department of Geology and Mineral Industries</cntorg>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing and physical address</addrtype>
          <address>800 NE Oregon Street Suite 965</address>
          <city>Portland</city>
          <state>Oregon</state>
          <postal>97232</postal>
          <country>USA</country>
        </cntaddr>
        <cntvoice>1 971 673 1555</cntvoice>
        <cntfax>1 971 673 1562</cntfax>
        <cntemail>dogami-info@dogami.oregon.gov</cntemail>
        <cntinst>When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from https://www.oregon.gov/dogami/pages/default.aspx</cntinst>
      </cntinfo>
    </metc>
    <metstdn>Oregon Department of Geology and Mineral Industries Metadata Standard</metstdn>
    <metstdv>1.4</metstdv>
    <metac>None</metac>
    <metuc>None</metuc>
    <metsi>
      <metscs>None</metscs>
      <metsc>None</metsc>
      <metshd>None</metshd>
    </metsi>
  </metainfo>
</metadata>
