158ee147-0e7b-4659-bc4b-d6b47ba5ce86 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-10-16T12:30:10 creation ISO 19115 2016 Boulia Springvale magnetic grid geodetic 158ee147-0e7b-4659-bc4b-d6b47ba5ce86 Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This Boulia Springvale magnetic grid geodetic has a cell size of 0.00083 degrees (approximately 89m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 1997 by the QLD Government, and consisted of 97019 line-kilometres of data at 400m line spacing and 80m terrain clearance. {"type": "Polygon", "coordinates": [[[139.4416, -24.0071], [141.0466, -24.0071], [141.0466, -21.9921], [139.4416, -21.9921], [139.4416, -24.0071]]]} 139.4416 141.0466 -24.0071 -21.9921 Australia EARTH SCIENCES Earth sciences GADDS2.0 NCI Published_External QLD TMI airborne digital data geophysical survey geophysics grid mag magnetics magnetism palaeomagnetism raster survey 673 total magnetic intensity File available for download in various formats from the GADDS2 portal documentDigital The Geophysical Archive Data Delivery System (GADDS2) portal provides HTTP download of geophysics datasets in a number of formats. Point and line datasets are available in NetCDF and ASEG-GDF2. Grid datasets are available in NetCDF, GeoTIFF and ERS. HTML Boulia Springvale magnetic grid geodetic file download documentDigital File download for Boulia Springvale magnetic grid geodetic application/x-netcdf Boulia Springvale magnetic grid geodetic NCSS documentDigital NetCDF Subsetting Service (NCSS) for Boulia Springvale magnetic grid geodetic HTML Boulia Springvale magnetic grid geodetic OPeNDAP documentDigital OPeNDAP web service for Boulia Springvale magnetic grid geodetic HTML Boulia Springvale magnetic grid geodetic WMS documentDigital OGC Web Mapping Service (WMS) for Boulia Springvale magnetic grid geodetic WMS Boulia Springvale magnetic grid geodetic WCS documentDigital OGC Web Coverage Service (WCS) for Boulia Springvale magnetic grid geodetic WCS