Large Format Map Points, Oregon.

Oregon Department of Geology and Mineral Industries 2026 Large Format Map Points, Oregon. vector digital data Oregon Department of Geology and Mineral Industries Digital Data MILO-4 Portland, Oregon, USA Oregon Department of Geology and Mineral Industries https://www.oregon.gov/dogami/pages/default.aspx Oregon Department of Geology and Mineral Industries 2026 Mineral Information Layer for Oregon-Release 4 (MILO-4) Release 4 Oregon Department of Geology and Mineral Industries Digital Data MILO-4 Portland, Oregon, USA Oregon Department of Geology and Mineral Industries https://www.oregon.gov/dogami/pages/default.aspx 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 Map Points feature class contains center points of hyperlinked large format maps in Adobe Portable Document Format (PDF) that were not related to 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! 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. 08/01/1991-08/31/2024 Planned Biennial -124.606691 -116.751975 45.819003 42.027013 ISO 19115 Topic Category geoscientificinformation Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus stone metallic mineral industrial mineral mineral resource zeolite sand and gravel USGS Thesaurus geospatial datasets hazards hazard preparedness scientific interpretation time series datasets Custom MILO (Mineral Information Layer for Oregon) Mine Mineral fuel Aggregate Gemstone Borrow Pit Prospect Quarry Gravel Pit Mineral Occurrence Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus United States North America Oregon Baker Benton Clackamas Clatsop Columbia Coos Crook Curry Deschutes Douglas Gilliam Grant Harney Hood River Jackson Jefferson Josephine Klamath Lake Lane Lincoln Linn Malheur Marion Morrow Multnomah Polk Sherman Tillamook Umatilla Union Wallowa Wasco Washington Wheeler Yamhill None 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. Oregon Department of Geology and Mineral Industries mailing and physical address

800 NE Oregon Street Suite 965

Portland Oregon 97232 USA 1 971 673 1555 1 971 673 1562 dogami-info@dogami.oregon.gov 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 Carlie J.M. Azzopardi Oregon Department of Geology and Mineral Industries 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. Unclassified Attribute accuracy is tested by manual comparison of the source and hard copy plots. The detail level (e.g. location information) 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. Some documents are duplicated due to varying degrees in quality of scans, but each scan has it's own individual feature. However no duplicated features exist although individual point features may overlap and share the same coordinates but have differences in attribute(s). 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. 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 spatial data are presented in the form of points representing the approximate centroid of the map. For additional maps outside the State of Oregon please contact the Oregon Department of Geology and Mineral Industries at dogami-info@oregon.gov For large format map scans, the positional quality of each varies widely or is entirely unknown especially where their location information was obtained from older published and unpublished sources. For example, in older sources location information is often reported in a narrative format and are accurate within a mile and most to within a quarter mile. Those in newer publications are usually reported by subdivisions of a section of land (Public Land Survey System or PLSS) or by latitude and longitude, and consequently, are probably accurate within a quarter of a mile, and most within an eighth of a mile. The digitizing method for locating the approximate centroid point locations involved heads-up digitization of various scale maps on the computer screen by using a computer mouse to scribe the feature. No steps were taken to check the point feature's positional accuracy. The accuracy of this data depends on a number of different types of errors: geodetic, machine, cartographic, and random errors. Not least of which depends on the level of detail included in the source material and the interpretation procedures for capturing that source. Therefor accuracy of this data is at best no more than 30 to 40 ft. Oregon Department of Geology and Mineral Industries 2020 Mineral Information Layer for Oregon, Release 3 [MILO-3] Release 3 vector digital data Oregon Department of Geology and Mineral Industries Digital Data MILO-3 Portland, Oregon Oregon Department of Geology and Mineral Industries 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. https://pubs.oregon.gov/dogami/dds/p-MILO-3.htm online 2020 publication MILO3 Oregon Department of Geology and Mineral Industries 2014 Large-Format Mine Maps - Index tabular digital data Portland, Oregon Oregon Department of Geology and Mineral Industries 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 https://www.oregon.gov/dogami/milo/Pages/index-minemaps.aspx online 20191028 updated Large Maps 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/). Although many maps were successfully correlated with a specific MILO mine point, 473 maps did not have a specific name, owner, or distinctive identifying information to link the map with a MILO mine point. These maps (LargeFormatMapPoints) remained in their point feature class format. Their attribute table fields were formatted in the same way as the large-format map geodatabase table. Large Maps Oregon Department of Geology and Mineral Industries mailing and physical address

800 NE Oregon Street Suite 965