Identification_Information: Citation: Citation_Information: Originator: David M. Miller Publication_Date: 2006 Title: Geologic contacts and faults in the Dove Spring Off-Highway Vehicle Open Area, Mojave Desert, California Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: U.S. Geological Survey Open File Report Issue_Identification: 2006-1265 Publication_Information: Publication_Place: Menlo Park, CA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2006/1265 Description: Abstract: This digital database, which was compiled from new mapping, contains lines depicting geologic unit boundaries and faults in the Dove Spring Off-Highway Vehicle Open Area. The lines were digitized and attributed from scanned and georeferenced source maps (see Process Description for details). Purpose: This dataset is part of a U.S. Geological Survey (USGS) monitoring plan to evaluate the environmental impact of off-highway vehicle (OHV) use on Bureau of Land Management (BLM) land in California. This study produced baseline data, which when combined with historic and current patterns of land use, forms the basis for vegetation and wildlife monitoring designed to address the following questions: 1) Is the density and length of OHV routes increasing? 2) Are there cumulative effects of past and current OHV use associated with changes in the environmental integrity of soils, plants, and wildlife? 3) Is the spread of invasive species associated with levels of OHV use? 4) Is there a threshold of OHV impact that might be translated to management action by the BLM? The monitoring studies will be used to collect baseline environmental information to determine levels of environmental impact of OHV use. This approach will use a low-impact area as a proxy for pre-impact conditions (substituting space for time) to determine thresholds of OHV impacts beyond which environmental integrity is affected. Indicators of environmental integrity will emphasize factors that are fundamental to ecosystem structure and function and likely to be sensitive to OHV impacts. Supplemental_Information: This is the arc feature class for the Surficial Geology of the Dove Spring Off-Highway Vehicle Open Area, Mojave Desert, California. Feature classes included in the geodatabase of the Surficial Geology of the Dove Spring Off-Highway Vehicle Open Area, Mojave Desert, California are: geologic units (dove_sp_poly) and geologic contacts and faults (dove_sp_arc). Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: unknown Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -118.079075 East_Bounding_Coordinate: -117.961124 North_Bounding_Coordinate: 35.464086 South_Bounding_Coordinate: 35.378361 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: geologic map Theme_Keyword: surficial geology Theme_Keyword: Off-Highway Vehicle Open Area Place: Place_Keyword: Mojave Desert Place_Keyword: Dove Spring Place_Keyword: California Access_Constraints: none Use_Constraints: Not for use at scales greater than 1:15,000. Any derivative products utilizing these datasets shall clearly indicate their source. If users modify the data in any way they are obligated to describe the types of modifications they have performed. User specifically agrees not to misrepresent these datasets, nor to imply that changes they made were approved by the U.S. Geological Survey. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David M. Miller Contact_Organization: U.S. Geological Survey Contact_Position: Research Geologist Contact_Address: Address_Type: mailing and physical address Address: U.S. Geological Survey Address: 345 Middlefield Road, MS-973 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-4923 Contact_Electronic_Mail_Address: dmiller@usgs.gov Data_Set_Credit: This digital database was prepared by David Miller. Technical review was provided by Geoff Phelps and Kevin Schmidt of the U.S. Geological Survey. Digital review was provided by Zenon Valin of the U.S. Geological Survey. Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Geologic features were identified, mapped, digitized, and attributed by the principle investigator (David M. Miller). The features were symbolized based on their attributes and plotted at 1:15,000-scale and compared visually with the original source maps. Logical_Consistency_Report: This database has been reviewed and is considered to be error-free. All features have attributes. Each line segment has a length and directionality that is appropriate for the geologic feature it depicts. No sliver polygons are present. Completeness_Report: This database is considered complete. All geologic features depicted on the source maps were digitized and attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Most of the geologic features in this database are considered to be accurately located, and within +/- 5 meters of their actual location on the topographic base map. This accuracy diminishes in areas where the topography is either flat or very steep, or where the geologic feature of interest is difficult to discern. The 1:24,000 topographic maps and corresponding Digital Orthoquarter Quadrangles (DOQQs) that were used as the primary mapping base for this project were assumed to meet the National Map Accuracy Standard of +/- 12 meters. Lineage: Process_Step: Process_Description: Geologic features (outlined in Supplemental Information) were identified on 1971 black and white, 1:24,000-scale aerial photographs. The features were heads-up digitized on Digital Ortho Ouarter Quadrangles by the principle authors in ArcMap 8.2(c), using the compilation aerial photographs as a guide. The digitizing scale was approximately 1:4,000. Errors were edited as needed to achieve an error-free database. Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David M. Miller Contact_Organization: U.S. Geological Survey Contact_Position: Research Geologist Contact_Address: Address_Type: mailing and physical address Address: U.S. Geological Survey Address: 345 Middlefield Road, MS-973 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-4923 Contact_Electronic_Mail_Address: dmiller@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: arcs Point_and_Vector_Object_Count: 1622 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 11 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -117.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000006 Ordinate_Resolution: 0.000006 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Resolution: 0.000010 Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: dove_sp_arc Entity_Type_Definition: Geologic contacts and faults Entity_Type_Definition_Source: User defined Attribute: Attribute_Label: Shape_Length Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SHAPE Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: LTYPE Attribute_Definition: Lines that represent the geologic contacts and faults at a scale of 1:15,000. Attribute_Definition_Source: User defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, uncertain Enumerated_Domain_Value_Definition: Boundary between two mapped units that has been observed but the location is not precise. Enumerated_Domain: Enumerated_Domain_Value: contact, gradational Enumerated_Domain_Value_Definition: Boundary between two mapped units that is transitional over an area. Enumerated_Domain: Enumerated_Domain_Value: fault, certain Enumerated_Domain_Value_Definition: Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the unit bodies on either side of the fault. The fault has been observed and is accurately located. Enumerated_Domain: Enumerated_Domain_Value: fault, uncertain Enumerated_Domain_Value_Definition: Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the unit bodies on either side of the fault. The fault has not been observed so it is not accurately located as described in Positional Accuracy. Enumerated_Domain: Enumerated_Domain_Value: fault, concealed Enumerated_Domain_Value_Definition: Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the unit bodies on either side of the fault. The fault is obscured by overlying units and it's trace is fairly apparent, so it is not well located as described in Positonal Accuracy. Enumerated_Domain: Enumerated_Domain_Value: map boundary Enumerated_Domain_Value_Definition: Extent of study area. Enumerated_Domain: Enumerated_Domain_Value: contact, certain Enumerated_Domain_Value_Definition: Boundary between two map units that is precisely located Attribute: Attribute_Label: SHAPE_Length Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, uncertain Enumerated_Domain_Value_Definition: Boundary between two mapped units that has been observed but the location is not precise. Overview_Description: Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Information Services Contact_Address: Address_Type: mailing address Address: Box 25286 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-800-ASK-USGS Contact_Electronic_Mail_Address: ask@usgs.gov Resource_Description: Downloadable Data 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 delivery, installation, operation, or support by USGS. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ArcGIS Personal Geodatabase Format_Version_Number: 9.1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2006/ Metadata_Reference_Information: Metadata_Date: 20061109 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David M. Miller Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 345 Middlefield Road, MS 973 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-4923 Contact_Facsimile_Telephone: 650-329-4936 Contact_Electronic_Mail_Address: dmiller@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile