Tags
Polygons-distribution of map units on the particular map horizon.
U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)
Identifier for the map unit.
U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)
Expresses whether or not the observations and data support the stated nature, origin, or geometry of a mapped geologic feature.
Federal Geographic Data Committee, Digital Cartographic Standard for Geologic Map Symbolization, 2006
Map unit label.
U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)
Equivalent to DescriptionOfMapUnits symbol
U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)
Foreign key to DataSources table, to track provenance of each data element.
U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)
Label (period delimited) assigned by area geologists that combines all the original map units into 7 different general geologic categories.
Oregon Department of Geology and Mineral Industries
General geologic rock type of the geologic merge unit label, expressed by the genesis of the unit.
Oregon Department of Geology and Mineral Industries
Age of geologic merge unit based on the Geologic Time Scale.
Oregon Department of Geology and Mineral Industries
Stratigraphic name (formally or informally named) for the terrane or group.
Oregon Department of Geology and Mineral Industries
Stratigraphic name (formally or informally named) for the geologic formation.
Oregon Department of Geology and Mineral Industries
Volcanic field that the unit is assigned to. In igneous provinces, a well-defined area covered with volcanic rocks with a common geologic history.
Oregon Department of Geology and Mineral Industries
Stratigraphic name (formally or informally named) for the member type.
Oregon Department of Geology and Mineral Industries
Stratigraphic name (formally or informally named) for the unit type.
Oregon Department of Geology and Mineral Industries
Characteristic lithology type name for the geologic merge unit label.
Oregon Department of Geology and Mineral Industries
Concatenation of DataSourceID and MapUnit fields without a space in between - for use with joins or relates of data tables in ArcGIS or other GIS software.
Oregon Department of Geology and Mineral Industries
Free text for additional information specific to this feature.
U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)
Primary key. Values = MUP1, MUP2, MUP3, etc. Values must be unique to the database
U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)
Point Type
U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)
The following attributes are possible for records in the map unit polygon data: MapUnit, IdentityConfidence, Label, Symbol, DataSourceID, ThematicUnitLabel, ThematicRockType, ThematicAge, ThematicTerraneGroup, ThematicFormation, VolcanicField, ThematicMember, ThematicUnit, ThematicLithology, ArcJoinKey, Notes, MapUnitPolys_ID, and PTYPE. Not all map unit polygons have applicable attributes. Appropriate attributes are filled in for each polygon.
Oregon Department of Geology and Mineral Industries
This feature class contains map unit polygons that represent bedrock and surficial geologic units drawn by the authors within the project study area. The attributes within this feature class are provided as a descriptive summary for each unit. The unit descriptions and derivation methods can be found in the accompanying pamphlet. This feature class does not have any cartographic representations associated with its features. Please see the accompanying pamphlet for more detailed information.
Polygons that record the distribution of map units on the particular map horizon. The polygons in this feature class are units of consolidated (solid) rock that underlie soils or other unconsolidated materials and unconsolidated earth materials such as soils and sediments. A polygon feature class representing the geologic map units as defined by the authors.
Publication
None
MAP 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.
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 http://www.oregongeology.org
Supported in part between 2014 and 2020 by the U.S. Geological Survey (USGS) STATEMAP [http://ncgmp.usgs.gov/about/statemap.html] component of the National Cooperative Geologic Mapping Program under assistance awards G15AC00180 and G20AC00202, and by the Oregon Water Resources Department through Interagency Agreements DOGAMI IAA# 12102013/OWRD 13 057 and DOGAMI IAA# DASPS-2542-16/OWRD IAA 16 047. Additional funds were provided by the State of Oregon through the Oregon Department of Geology and Mineral Industries (DOGAMI).
Care was taken to limit categorical attribute errors. Attribute accuracy of the database was visually inspected but despite the checks there may be some attributes that are still mislabeled.
Topology has been validated for the feature classes. Topology errors: 0. Topology exceptions: 20; MapUnitPolys must not have gaps 1 exception for project boundary of polygons; ContactsAndFaults must not have dangles 19 exceptions for faults. Duplicate point locations were found. No attempt has been made to correct the errors as they are related to multiple samples at one location, retesting of samples, and/or variance in Z values. Tests for logical consistency were performed by ArcGIS Topology software and GeMS Tools for Arc10.5 2018-03-04; Topology Check script and Validate Database script. All points, lines, and polygons were visually checked, and are labelled correctly.
Data collection does not include all possible traverses, measured sections, etc., and thereby is not complete. Not all field data were collected nor were all of the data compiled from lineage maps. Geologic concepts and definitions of map units are current. Density of observations is sufficient to support the map(s).
Data was collected and interpreted at a variety of scales. For field work, a combination of hillshade images from, DOGAMIs lidar 3 ft pixel bare earth DEM (approximately 1 point every 0.3 meters), NAIP imagery derived structure for motion (SFM) 5 m pixel bare earth DEM (approximately 1 point every 5 meters), and/or 10m pixel bare earth DEM (approximately 1 point every 10 meters) served as basemap(s). Precision mapping using, GPS, GIS, and the lidar imagery employed an application for the iPad, called iGIS. On the computer, line work was nominally drawn at a scale of 1:8,000. Also, geologic data was compiled from paper maps. Positional errors should be expected from input of digitized points and lines from paper maps and the errors that arise from georeferencing the paper maps (accuracy of content). Not all resources were tested to evaluate the degree to which these inaccuracies exist. Positional accuracy of geologic contacts, structures, and measurement points is influenced by the subjective judgment of the mappers or by interpretation of remotely sensed data (e.g., lidar). Therefore, the data user must consider the aforementioned methods of data collection and compilation in context of positional accuracy and understand that most lines and polygon boundaries are inferred based on geologic interpretations.
Maximum error calculated from the 1:8000 scale horizontal positional accuracy error.
Lineage maps were used as base maps in the following manner: 1) to compare the mapping against previous work; 2) scribing geologic features, e.g., bedding, faults, and folds; and 3) reference materials.
Topology checks were performed on the GeologicMap feature dataset by, employing the Topology check script provided in the GeMS Tools for Arc10.5 2018-03-04, and checking additional topology rules using Esri ArcGIS 10.7 for desktop. The Topology Check script in the GeMS toolkit provides additional checks for automation errors and geologic blunders. This script builds and evaluates an ArcGIS topology with these rules: no overlaps in ContactsAndFaults, no self-overlaps in ContactsAndFaults, no self intersections in ContactsAndFaults, no gaps in MapUnitPolys, no overlaps in MapUnitPolys, and all MapUnitPoly boundaries are covered by ContactsAndFaults arcs. Topology Check also evaluates node topology, summarizes the map units that bound ContactsAndFaults arcs, checks for duplicate point features, and identifies very small polygons in MapUnitPolys and very short arcs in ContactsAndFaults. Results of Topology Check should be taken with a grain of salt, as some issues flagged by this script may not be errors. In addition to the GeMS Topology Check the following are added topology rules checked for the dataset. Rule 1: ContactsAndFaults must not have dangles. Rule 2: Cartographic Lines must not self-overlap. Rule 3: Cartographic Lines must not self-intersect. Rule 4: Cartographic Lines must be single part.
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 http://www.oregongeology.org
The following attributes are possible for records in the map unit polygon data: MapUnit, IdentityConfidence, Label, Symbol, DataSourceID, ThematicUnitLabel, ThematicRockType, ThematicAge, ThematicTerraneGroup, ThematicFormation, VolcanicField, ThematicMember, ThematicUnit, ThematicLithology, ArcJoinKey, Notes, MapUnitPolys_ID, and PTYPE. Not all map unit polygons have applicable attributes. Appropriate attributes are filled in for each polygon.
Oregon Department of Geology and Mineral Industries
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 http://www.oregongeology.org
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.
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 http://www.oregongeology.org