GSNI Tellus Regional Airborne Geophysical Survey - Magnetic Grids

Data were processed using Geosoft Oasis Montaj and supplied in three formats.

Geosoft Grid
ESRI Geodatabase
ASCII Grid

Note that the presence of ‘Minc from V3 gdb, cellsize 35m’ in the grid filename indicates that the grid was generated using the Minimum Curvature interpolation method, from data contained within the Magnetics V3 database, using a cell size of 35m.

The following file are provided:

TELLUS_Magnetic (Minc from V3 gdb, cellsize 35m) MAG_RES

TMI Magnetic Residual generated using the Minimum Curvature interpolation method, from data contained within the MAG_RES channel of the Magnetics V3 database, using a cell size of 35m.

TELLUS_Magnetic (Minc from V3 gdb, cellsize 35m) MAG_RES_GRD_s

A sunshade of the TMI Magnetic Residual generated using the Minimum Curvature interpolation method, from data contained within the MAG_RES channel of the Magnetics V3 database, using a cell size of 35m. Shading parameters (inclination = 45 degrees, declination = 0 degrees).

TELLUS_Magnetic (Minc from V3 gdb, cellsize 35m) MAG_RES – psg

Pseudogravity generated using the Minimum Curvature interpolation method, from data contained within the Magnetics V3 database, using a cell size of 35m

TELLUS_Magnetic (Minc from V3 gdb, cellsize 35m) MAG_RES - psg_GRD_s

A sunshade of the Pseudogravity generated using the Minimum Curvature interpolation method, from data contained within the Magnetics V3 database, using a cell size of 35m. Shading parameters (inclination = 45 degrees, declination = 0 degrees).

TELLUS_Magnetic (Minc from V3 gdb, cellsize 35m) MAG_RES - psg – TiltD

Pseudogravity – Tilt Derivative generated using the Minimum Curvature interpolation method, from data contained within the Magnetics V3 database, using a cell size of 35m.

TELLUS_Magnetic (Minc from V3 gdb, cellsize 35m) MAG_RES - psg - TiltD_GRD_s

A sunshade of the Pseudogravity – Tilt Derivative generated using the Minimum Curvature interpolation method, from data contained within the Magnetics V3 database, using a cell size of 35m. Shading parameters (inclination = 45 degrees, declination = 0 degrees).

TELLUS_Magnetic (Minc from V3 gdb, cellsize 35m) MAG_RES – rtp

Reduced to Pole generated using the Minimum Curvature interpolation method, from data contained within the Magnetics V3 database, using a cell size of 35m.

TELLUS_Magnetic (Minc from V3 gdb, cellsize 35m) MAG_RES - rtp_GRD_s

A sunshade of the Reduced to Pole generated using the Minimum Curvature interpolation method, from data contained within the Magnetics V3 database, using a cell size of 35m. Shading parameters (inclination = 45 degrees, declination = 0 degrees).

TELLUS_Magnetic (Minc from V3 gdb, cellsize 35m) MAG_RES - rtp – TiltD

Reduced to Pole – Tilt Derivative generated using the Minimum Curvature interpolation method, from data contained within the Magnetics V3 database, using a cell size of 35m.

TELLUS_Magnetic (Minc from V3 gdb, cellsize 35m) MAG_RES - rtp - TiltD_GRD_s

A sunshade of the Reduced to Pole – Tilt Derivative generated using the Minimum Curvature interpolation method, from data contained within the Magnetics V3 database, using a cell size of 35m. Shading parameters (inclination = 45 degrees, declination = 0 degrees).

Data and Resources

Tellus Magnetics Grids - Geosoft FormatGeosoft Grid
This zip file contains a series of grids in Geosoft Grid format that were...
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Tellus Magnetics Grids - ESRI FormatEsri Grid
This zip file contains an ESRI Geodatabase with a series of grids that were...
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Tellus Magnetics Grids - ASCII FormatASCII Grid
This zip file contains a series of grids in ASCII format that were produced...
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Additional Info

Field	Value
Creation Date	November 19, 2018, 16:23 (UTC)
Topic Category	Geoscientific Information Imagery / Base Maps / Earth Cover
Lineage	Data were processed using Geosoft Oasis Montaj and supplied in three formats. 1. Geosoft Grid 2. ESRI Geodatabase 3. ASCII Grid Note that the presence of ‘Minc from V3 gdb, cellsize 35m’ in the grid filename indicates that the grid was generated using the Minimum Curvature interpolation method, from data contained within the Magnetics V3 database, using a cell size of 35m.
Frequency of Update	Not Planned
Contact Name	Alex Donald
Contact Email	alex.donald@economy-ni.gov.uk
Additional Information	Information on survey, processing and data conditioning can be found in the following reports: A Guide to the Tellus Data edited by Young, M.E. and Donald, A.W. can be downloaded at http://nora.nerc.ac.uk/id/eprint/509171/ Beamish, D.; Cuss, R.J.; Lahti, M.; Scheib, C.; Tartaras, E.. 2006 The Tellus airborne geophysical survey of Northern Ireland : final processing report. Nottingham, UK, British Geological Survey, 74pp. (IR/06/136) (Unpublished) http://nora.nerc.ac.uk/7427/ Lahti, M.; Beamish, D.; Cuss, R.J.; Williams, J.. 2007 Deculturing of the Northern Ireland Tellus magnetic data. Nottingham, UK, British Geological Survey, 51pp. (IR/07/047) (Unpublished) http://nora.nerc.ac.uk/7570/ Beamish, D.; Cuss, R.J.; Lahti, M.. 2006 The Tellus Airborne Geophysical Survey of Northern Ireland. Phase 1, logistics report. Nottingham, UK, British Geological Survey, 55pp. (IR/06/032) (Unpublished) http://nora.nerc.ac.uk/7184/
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