Identification_Information: Citation: Citation_Information: Originator: Norman J Page Originator: Warren J. Nokleberg Originator: Robert J. Miller Publication_Date: 2002 Title: Geologic map of the Stillwater Complex, Montana: a digital database Edition: Version 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Series Issue_Identification: Map I-797 Publication_Information: Publication_Place: Menlo Park, CA Publisher: U. S. Geological Survey Online_Linkage: http://geopubs.wr.usgs.gov/i-map/i797/ Description: Abstract: This report provides a digital version of the Geologic map of the Stillwater Complex, Montana by Page and Nokleberg (1974). Paper copies of the four geologic map sheets from the original report were scanned and initially attributed by Optronics Specialty Co., Inc. (Northridge, CA) and remitted to the U.S. Geological Survey for further attribution and publication of the geospatial digital files. The resulting digital geologic dataset can be queried in a geographic information system (GIS) in many ways to produce a variety of geological maps. Purpose: This dataset was developed to provide a spatial database of the 1:12000-scale geologic map of the Stillwater Complex for use in future spatial analysis. These data can be printed in a variety of ways to display various geologic features or used for digital analysis and modeling. This database is not meant to be used or displayed at any scale larger than 1:12000. The digital geologic map files (i797s1.pdf/.ps, i797s2.pdf/.ps, i797s3.pdf/.ps, and i797s4.pdf/.ps) that are provided in the digital package are representations of the digital database. They are not designed to be cartographic products. Supplemental_Information: This GIS dataset consists of two ArcInfo datasets. The first is a line and polygon file (i797) containing geologic contacts and structures (lines) and geologic map rock units (polygons). A second file contains structural point data (i797p). These coverages are also provided in the geographic coordinate system (i797g and i797pg). Because the topographic base map for the original publication (Page and Nokleberg, 1974) is no longer readily available, a georeferenced image of the original basemap is provided as i797base.tif/.tfw. In addition, georeferenced color images of the original map sheets have been provided as i797origs1.tif/.tfw, i797origs2.tif/.tfw, i797origs3.tif/.tfw, and i797origs4.tif/.tfw. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -110.247638 East_Bounding_Coordinate: -109.736573 North_Bounding_Coordinate: 45.520307 South_Bounding_Coordinate: 45.327177 Keywords: Theme: Theme_Keyword: geology Theme_Keyword: geologic map Theme_Keyword: structural geology Theme_Keyword: chromite Theme_Keyword: platinum Place: Place_Keyword: Beartooth Mountains Place_Keyword: Montana Place_Keyword: Stillwater County Place_Keyword: Sweetgrass County Stratum: Stratum_Keyword: Stillwater Complex Stratum_Keyword: Madison Limestone Stratum_Keyword: Morrison Formation Stratum_Keyword: Kootenai Formation Stratum_Keyword: Ellis Group Temporal: Temporal_Keyword: Precambrian Temporal_Keyword: Mesozoic Temporal_Keyword: Cenozoic Access_Constraints: none Use_Constraints: This digital database is not meant to be used or displayed at any scale larger than 1:12,000 (e.g. 1:6,000). Any hardcopies utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. User specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by the US Geological Survey Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Robert J. Miller Contact_Organization: U. S. Geological Survey Contact_Position: geologist Contact_Voice_Telephone: 650 329-5407 Contact_Electronic_Mail_Address: rjmiller@usgs.gov Data_Set_Credit: Optronics Specialty Corp., Inc. (Northridge, CA) scanned the four geologic map sheets of Page and Nokleberg (1974) and provided minimally attributed ArcInfo interchange-format files to the U.S. Geological Survey. Helen Z. Kayser (contractor) registered and transformed to the datasets to the Montana state plane coordinate system. Robert J. Miller combined the 8 individual sheet files into the two-theme (geology and structural data) datasets, attached and attributed an interim geologic map data model; and visually compared the hard copy plots with the source documents. Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.1.0.642 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Attribute accuracy was verified by manual comparision of the source with hard copy printouts, plots, and on-screen evaluation. Logical_Consistency_Report: Polygon and chain-node topology present. Segments making up the outer and inner boundaries of a polygon tie end-to-end to completely enclose the area. Line segments are a set of sequentially numbered coordinate pairs. No duplicate features exist nor duplicate points in a data string. Intersecting lines are separated into individual line segments at the point of intersection. All nodes are represented by a single coordinate pair, which indicates the beginning or end of a line segment. Completeness_Report: All geologic units were compiled from Page and Nokelberg (1974) at a scale of 1:12,000. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The horizontal position accuracy for the digital data is no better than +/- 18 feet for the east half of map (sheet 1 and 2 of original publication) and +/- 8 feet for western half (sheets 3 and 4 of the original) based on the digitizing root mean square (RMS) error. The geologic mapping was compiled on a topographic basemap map made in 1943. This basemap locally differs from modern 1:24,000-scale topographic maps of the area, and thus geologic linework may locally appear mislocated when viewed with other than the original publication's 1943 basemap. The individual scanned images of parts of the basemap typically had an RMS error of approximately 3 meters. However, where parts of the georeferenced scans overlap, local shifts of up 15 meters were noted. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: N.J Page and W.N. Nokleberg Publication_Date: 1974 Title: Geologic map of the Stillwater Complex, Montana Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Miscellaneous Investigations Map Issue_Identification: Map I-797 Publication_Information: Publication_Place: Reston, Virginia Publisher: U. S. Geological Survey Source_Scale_Denominator: 12000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1974 Source_Currentness_Reference: Publication date Source_Contribution: This map was the only map used to create the digital geologic map database. Process_Step: Process_Description: The published paper geologic map sheets were scanned by Optronics Speciality Corp., Inc. (Northridge, CA). Process_Date: 2000 Process_Step: Process_Description: The digital files were registered and transformed to state plane coordinate system by Helen Z. Kayser (contractor) at the USGS Spokane Field Office. Robert J. Miller combined the datasets and applied an iterim geologic map data model. The data were then checked for position and attribute accurracy by comparing plots of the digital data to the source maps. Process_Date: 2001 Process_Step: Process_Description: Low resolution scans (100 dpi) of portions of the basemap were georeferenced and converted to Arc/Info grids. The grids were clipped and merged into a single file then saved in a TIFF format. Process_Date: 2002 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Complete chain Point_and_Vector_Object_Count: 11679 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Label point Point_and_Vector_Object_Count: 3911 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 3911 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 114 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: State Plane Coordinate System 1927 State_Plane_Coordinate_System: SPCS_Zone_Identifier: 2503 Lambert_Conformal_Conic: Standard_Parallel: 44.866667 Standard_Parallel: 46.400000 Longitude_of_Central_Meridian: -109.500000 Latitude_of_Projection_Origin: 44.000000 False_Easting: 2000000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.001195 Ordinate_Resolution: 0.001195 Planar_Distance_Units: survey feet Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The i797 dataset includes a geologic linework arc attribute table, i797.aat, that relates to the i797.con (contact look-up table), i797.st3 (structure look-up table),i797.lgu (linear geologic unit look-up table), and i797.ref (source reference look-up table) files; and a rock unit polygon attribute table, i797.pat, that relates to the i797.ru (rock unit look-up table) and i797.ref (source reference look-up table) files. The i797p dataset includes a structural point data attribute table, i797p.pat, that relates to the i797p.sym (symbol look-up table) and i797p.ref (source reference look-up table) files. Entity_and_Attribute_Detail_Citation: A detailed description of the items in the the Stillwater Complex database are given in the report text provided in Adobe Acrobat PDF format on the World Wide Web at http://geopubs.wr.usgs.gov/i-map/i797/i797.pdf Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Instructions: This report is only available in electronic format at URL = http://geopubs.wr.usgs.gov/i-map/i797 or via anonymous FTP from geopubs.wr.usgs.gov, in the directory pub/i-map/i797. Distribution_Liability: The U.S. Geological Survey (USGS) provides these geographic data "as is". The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the USGS 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 use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by USGS. This digital geologic map GIS of the Stillwater Complex, Montana, is not meant to be used or displayed at any scale larger than 1:12,000 (for example, 1:2,000). Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Transfer_Size: 4.080 Metadata_Reference_Information: Metadata_Date: 20020510 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Robert J. Miller Contact_Position: geologist Contact_Address: Address_Type: mailing address Address: MS 901 Address: 345 Middlefield Rd City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650 329-5407 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: none Metadata_Use_Constraints: none Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile