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Service Description: Data sourced from the FROGTECH_NZ_ECS_SEEBASE product in the 2013 NZP&M Block Offer Data Pack. The magnetic grid was generated by FROGTECH from the World Digital Magnetic Anomaly Map (WDMAM) or EMAG3 (2007), a global 3-arc-minute resolution grid of the anomaly of the magnetic intensity at an altitude of 5 km above mean sea level. It was compiled from satellite, marine, aeromagnetic and ground magnetic surveys. Information on this dataset can be found in http://www.geomag.us/models/wdmam.html The TMI magnetic data was Reduced to the Pole (RTP). RTP Processing FROGTECH's methodology for RTP processing is determined by the size of the project area. For small surveys, the RTP transformation is simple requiring only one set of geomagnetic parameters. However, for larger surveys, such as the New Zealand SEEBASETM Project, the area is broken down into smaller sub-areas on which the RTP transformation is computed. To obtain Reduction to the Pole (RTP), a transformation from TMI to the magnetic field at the North or South Pole is required. The transformation is computed based on a local geomagnetic inclination and declination. The result of the reduction to the pole (RTP) operation is a field which would be observed if the given field had been observed with vertical polarization, that is, as though observed at one of the Earth’s magnetic poles (refer to the figure on the right). If strong remanent magnetization is present in directions other than that of the Earth, the transformed field will be in error. TMI data is routinely reduced to the pole to shift anomalies directly over their source and for vertical dipping sources to produce symmetric anomalies. The location of sources, particularly source edges, can more readily be determined when the magnetic data has been reduced to the pole.
Name: geophysical/magnetics_wdmam_rtp
Description: Data sourced from the FROGTECH_NZ_ECS_SEEBASE product in the 2013 NZP&M Block Offer Data Pack. The magnetic grid was generated by FROGTECH from the World Digital Magnetic Anomaly Map (WDMAM) or EMAG3 (2007), a global 3-arc-minute resolution grid of the anomaly of the magnetic intensity at an altitude of 5 km above mean sea level. It was compiled from satellite, marine, aeromagnetic and ground magnetic surveys. Information on this dataset can be found in http://www.geomag.us/models/wdmam.html The TMI magnetic data was Reduced to the Pole (RTP). RTP Processing FROGTECH's methodology for RTP processing is determined by the size of the project area. For small surveys, the RTP transformation is simple requiring only one set of geomagnetic parameters. However, for larger surveys, such as the New Zealand SEEBASETM Project, the area is broken down into smaller sub-areas on which the RTP transformation is computed. To obtain Reduction to the Pole (RTP), a transformation from TMI to the magnetic field at the North or South Pole is required. The transformation is computed based on a local geomagnetic inclination and declination. The result of the reduction to the pole (RTP) operation is a field which would be observed if the given field had been observed with vertical polarization, that is, as though observed at one of the Earth’s magnetic poles (refer to the figure on the right). If strong remanent magnetization is present in directions other than that of the Earth, the transformed field will be in error. TMI data is routinely reduced to the pole to shift anomalies directly over their source and for vertical dipping sources to produce symmetric anomalies. The location of sources, particularly source edges, can more readily be determined when the magnetic data has been reduced to the pole.
Single Fused Map Cache: false
Extent:
XMin: 467775
YMin: 3529575
XMax: 3369195
YMax: 7240185
Spatial Reference: 2193
(2193)
Initial Extent:
XMin: 467775
YMin: 3529575
XMax: 3369195
YMax: 7240185
Spatial Reference: 2193
(2193)
Full Extent:
XMin: 467775
YMin: 3529575
XMax: 3369195
YMax: 7240185
Spatial Reference: 2193
(2193)
Pixel Size X: 2430.0
Pixel Size Y: 2430.0
Band Count: 1
Pixel Type: F32
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Mensuration Capabilities: Basic
Has Histograms: true
Has Colormap: false
Has Multi Dimensions : false
Rendering Rule:
Min Scale: 0
Max Scale: 0
Copyright Text: FROGTECH
Service Data Type: esriImageServiceDataTypeGeneric
Min Values: -859.2584838867188
Max Values: 1091.896728515625
Mean Values: 0.3559860224410124
Standard Deviation Values: 111.6703096018346
Object ID Field:
Fields:
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Default Mosaic Method: Center
Allowed Mosaic Methods:
SortField:
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Mosaic Operator: First
Default Compression Quality: 75
Default Resampling Method: Bilinear
Max Record Count: null
Max Image Height: 4100
Max Image Width: 15000
Max Download Image Count: null
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Allow Raster Function: true
Allow Copy: null
Allow Analysis: null
Allow Compute TiePoints: false
Supports Statistics: false
Supports Advanced Queries: false
Use StandardizedQueries: true
Raster Type Infos:
Name: Raster Dataset
Description: Supports all ArcGIS Raster Datasets
Help:
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Edit Fields Info: null
Ownership Based AccessControl For Rasters: null
Child Resources:
Info
Histograms
Key Properties
Legend
Raster Function Infos
Supported Operations:
Export Image
Identify
Measure
Compute Histograms
Compute Statistics Histograms
Get Samples
Compute Class Statistics
Query Boundary
Compute Pixel Location
Compute Angles
Validate
Project