Parent Layer: Gravity Contours

Name: Tooele_GravityContours

Display Field: Feature

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: Explanation of PACES Gravity DatasetA set of gravity data is provided for the Dugway Proving Ground map area that was obtained from the Pan American Center for Earth and Environmental Sciences (PACES) at the University of Texas El Paso. We accessed this data from their website in 2012 (PACES, 2012). This is a compilation of data provided from various sources to PACES. Gravity measurement locations are indicated as points. The gravity measurements were adjusted to obtain Bouguer gravity anomalies. The map presents the Complete Bouguer gravity anomaly (CBGA) which is the gravity field anomaly after accounting for variations due to elevation, terrain and latitude; interpolated using a 5 km grid in order to average out inherent, yet minute, differences in the PACES gravity data and contoured at an interval of 1 milliGal (mGal). Local spatial variations in the CBGA field (after correcting for deep crustal structure) reflect the distribution of densities in the mid- to upper crust. Densities often can be related to rock type, and abrupt spatial changes in density commonly mark lithologic or structural boundaries. Lower gravity anomalies generally reflect less dense valley fill deposits (mass deficiency), while higher anomalies reflect higher density pre-Cenozoic rocks (mass excess) exposed within mountain ranges of the map area.

Copyright Text: Pan American Center for Earth and Environmental Sciences (PACES) at the University of Texas El Paso. PACES has played a significant role in the compilation of gravity data in southwestern North America. This effort has been conducted in close cooperation with the U. S. Geological Survey, the National Geospatial-Intelligence Agency (formerly the National Image and Mapping Agency), National Oceanic and Atmospheric Administration, industry and academic colleagues. Together, we have developed the GeoNet gravity database portal that provides access to our new database for the U. S. The U. S. Geological Survey Open File report that describes this effort is available at this link: Open-File Report 02-463. The version now available is a major update to existing databases and is now also terrain corrected. This effort is also a key part of our NSF-supported projects to develop a geoscience cyberinfrastructure (GEON and SWGeoNet), and also features a tutorial "Getting Started: Using and Understanding Gravity Data". The new terrain corrected United States gravity database is available through the GeoNet link below. The terrain corrections were calculated by Mike Webring of the U. S. Geological Survey using a digital elevation model and a technique based on the approach of Donald Plouff. The reduction of these data has been updated with modern geodetic datums and a higher precision digital elevation model. In the present version, latitude and longitude values are referenced to NAD83 (North American Datum 83; horizontal datum) and elevation values in meter are referenced to NGVD88 (Vertical datum).

Default Visibility: true

MaxRecordCount: 10000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Effective Min Scale: 288895

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: true

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -1.2579208333700001E7
YMin: 4938861.262000002
XMax: -1.2467870035E7
YMax: 5012336.620099999
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: RuleID
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
Style: esriSLSSolid
Color: [255, 0, 0, 255]
Width: 4
Default Label: Invalid Rule
UniqueValueInfos:
• Value: 1
  Label: Gravity contour. 1 mgal
  Description: N/A
  Symbol:
  Style: esriSLSSolid
  Color: [153, 0, 255, 255]
  Width: 0
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• SHAPE ( type: esriFieldTypeGeometry, alias: SHAPE )
• Id ( type: esriFieldTypeInteger, alias: Id )
• Contour ( type: esriFieldTypeDouble, alias: Contour )
• Shape_Leng ( type: esriFieldTypeDouble, alias: Shape_Leng )
• Feature ( type: esriFieldTypeString, alias: Feature, length: 100 )
• RuleID ( type: esriFieldTypeInteger, alias: RuleID , Coded Values: [1: Gravity contour. 1 mgal] , [-1: Free Representation] )
• SHAPE_Length ( type: esriFieldTypeDouble, alias: SHAPE_Length )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata