Identification_Information: Citation: Citation_Information: Originator: V.E. Langenheim Publication_Date: 2016 Title: High-resolution gravity and seismic-refraction surveys of the Smoke Tree Wash area, Joshua Tree National Park, California Geospatial_Data_Presentation_Form: point digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2016-XXXX Publication_Information: Publication_Place: Menlo Park, CA Publisher: U.S. Geological Survey Online Linkage: http://dx.doi.org/10.3133/ofr2016XXXX Description: Abstract: Gravity data of the Smoke Tree Wash area, Joshua Tree National Park, California. Digital Files: This metadata file describes the ASCII gravity data named iso_all.txt. Purpose: Gravity data form a basis for geophysical interpretations. Supplemental_Information: This open-file report updates geophysical information originally presented in smaller-scale formats and includes previously unpublished data collected by the U.S. Geological Survey. Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -115.8745 East_Bounding_Coordinate: -115.7667 North_Bounding_Coordinate: 33.8402 South_Bounding_Coordinate: 33.7498 Keywords: Theme: Theme_Keyword: isostatic gravity Theme_Keyword: gravity anomaly Place: Place_Keyword: southern California Place_Keyword: Joshua Tree National Park Place_Keyword: Smoke Tree Wash Access_Constraints: none Use_Constraints: Uses of this digital data should not violate the spatial or attribute resolution of the data. Although the digital form of the data stores location and attribute values to several decimals of precision, the data are subject to the accuracy and precision inherent in the data due to data collection and processing limitations. Where these data are used in combination with other data, the precision and accuracy of the resulting dataset is limited by the precision and accuracy of the input datasets. Acknowledgement of the U.S. Geological Survey is appreciated for products derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: V.E. Langenheim Contact_Organization: U.S. Geological Survey Contact_Position: geophysicist Contact_Address: Address_Type: physical address Address: 345 Middlefield Rd. City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-5313 Contact_Electronic_Mail_Address: zulanger@usgs.gov Native_Data_Set_Environment: ASCII Native_Data_Set_Environment: Geophysical data were stored and analyzed on a SUN Ultra4000 UNIX platform Geospatial_Data_Presentation_Form: ascii digital data (gravity data) Series_Information: Series_Name: U.S. Geological Survey (USGS) Open-File Report Issue_Identification: 2016-XXXX Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Online_Linkage: Data_Quality_Information: Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Accuracy of the old point data is roughly 40 m, as well as the data can be located on a 1:24,000-scale topographic map, and less than 0.3 m for the new data. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Accuracy of the point data vary; most of the elevations are accurate to 10 feet or less. For the new data, the accuracy is 3 ft or less. Attribute_Accuracy: Attribute_Accuracy_Report: Observed gravity data are accurate to 0.05 mGal; reduced anomalies are accurate to ~0.25-1 mGal. Data are more accurate in the valleys than in the mountains because of uncertainties in elevation and in the terrain correction. Logical_Consistency_Report: see open-file report Completeness_Report: Dataset based on geophysical analysis. See open-file report Lineage: Source_Information: Source_Citation: Citation_Information: Langenheim, V.E., Biehler, Shawn, McPhee, D.K., McCabe, C.M., Watt, J.T., Anderson, M., Chuchel, B.A., and Stoffer, P., 2007, Preliminary isostatic residual gravity anomaly map of Joshua Tree National Park and vicinity, California: U.S. Geological Survey Open-File Report 2007-1218, scale 1:100,000 (http://pubs.usgs.gov/of/2007/1218/) Originator: Langenheim, V.E., Biehler, Shawn, McPhee, D.K., McCabe, C.M., Watt, J.T., Anderson, M., Chuchel, B.A., and Stoffer, P. Publication_Date: 2007 Title: Preliminary isostatic residual gravity anomaly map of Joshua Tree National Park and vicinity, California Series_Information: Series_Name: U.S. Geological Survey Open-File Report, scale 1:100,000. Edition: first edition Source_Information: Source_Citation: Citation_Information: this report Originator: US Geological Survey Publication_Date: 2016 Title: Gravity and seismic-refraction surveys of the Smoke Tree Wash area, Joshua Tree National Park, California Series_Information: Series_Name: US Geological Open-File Report Edition: first edition Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geodetic_Model: Horizontal_Datum_Name: Geographic NAD27 Ellipsoid_Name: CLARKE 1866 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Definition: Attributes of gravity stations for Open-File Report 2016-XXXX Entity_Type_Definition_Source: This report Attribute: Attribute_Label: STATION_NAME Attribute_Definition: identification string Attribute_Definition_Source: this report Attribute_Domain_Values: Attribute: Attribute_Label: LATD Attribute_Definition: integer degrees of latitude Attribute_Definition_Source: this report Attribute_Domain_Values: Attribute: Attribute_Label: LATM Attribute_Definition: minutes of latitude Attribute_Definition_Source: this report Attribute_Domain_Values: Attribute: Attribute_Label: LOND Attribute_Definition: integer degrees of longitude Attribute_Definition_Source: this report Attribute_Domain_Values: Attribute: Attribute_Label: LONM Attribute_Definition: minutes of longitude Attribute_Definition_Source: this report Attribute_Domain_Values: Attribute: Attribute_Label: ELEV Attribute_Definition: elevation in feet Attribute_Definition_Source: this report Attribute_Domain_Values: Attribute: Attribute_Label: OG Attribute_Definition: observed gravity in mGal (-999 if not available) Attribute_Definition_Source: this report Attribute_Domain_Values: Attribute: Attribute_Label: FAA Attribute_Definition: Free-air anomaly in mGal Attribute_Definition_Source: this report Attribute_Domain_Values: Attribute: Attribute_Label: SBA Attribute_Definition: Simple Bouguer anomaly in mGal (-999 if not available) Attribute_Definition_Source: this report Attribute_Domain_Values: Attribute: Attribute_Label: ITC Attribute_Definition: inner zone terrain correction in mGal (-999 if not available) Attribute_Definition_Source: this report Attribute_Domain_Values: Attribute: Attribute_Label: TTC Attribute_Definition: total terrain correction in mGal (-999 if not available) Attribute_Definition_Source: this report Attribute_Domain_Values: Attribute: Attribute_Label: TC_CODE Attribute_Definition: Letter denoting the extent of the correction, according to the Hayford-Bowie template Attribute_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: D Enumerated_Domain_Value_Definition: gravitational terrain correction to a distance of 590 meters Enumerated_Domain_Value_Definition_Source: This report Enumerated_Domain: Enumerated_Domain_Value: G Enumerated_Domain_Value_Definition: gravitational terrain correction to a distance of 1530 meters Enumerated_Domain_Value_Definition_Source: This report Attribute: Attribute_Label: CBA Attribute_Definition: complete Bouguer gravity anomaly in mGal (reduction density 2,670 kg/m3) Attribute_Definition_Source: this report Attribute_Domain_Values: Attribute: Attribute_Label: ISO Attribute_Definition: isostatic residual gravity anomaly in mGal(reduction density 2,670 kg/m3) Attribute_Definition_Source: this report Attribute_Domain_Values: Overview_Description: Entity_and_Attribute_Overview: The data file is in ASCII format (tab- and space-delimited). Lines denoted by "\" are header lines that separate data of different sources. The data define point data with information as follows: STATION_NAME: an alphanumeric combination of up to 8 characters used for station identification LATD: Degree latitude LATM: Minute latitude LOND: Degree longitude LONM: Minute latitude ELEV: Elevation in feet OG: Observed gravity FAA: Free-air anomaly SBA: Simple Bouguer anomaly ITC: Inner terrain correction out to a radius of various distances from the station, for a density of 2,670 kg/m3 TTC: Total terrain correction from the station to 166.7 km for a density of 2,670 kg/m3 TC CODE: Letter denoting the extent of the correction, according to the Hayford-Bowie and Hammer templates (D=590 meters; G=1530 meters; See Spielman and Ponce (1984) for additional explanation. CBA: Complete Bouguer gravity anomaly reduced for a density of 2,670 kg/m3 ISO: Isostatic residual gravity anomaly values (reduced for a density of 2,670 kg/m3) Spielman, J.B., and Ponce, D.A., 1984, Handtc, a fortran program to calculate inner-zone terrain corrections: U.S. Geological Survey Open-File Report 84-777, 24 p. Overview_Description: Entity_and_Attribute_Overview: point data representing gravity data Metadata_Reference_Information: Metadata_Date: 20160122 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata