Hi Grant, As a potential fields geophysicist myself, I often do all my processing using GMT or Mirone,both of which can be used to compute derivatives via grdfft, including directional and differential RTP (for your mag). GMT can work with a number of data formats but primarily netCDF; Mirone has a few more import options for grids.
Getting grids into QGIS is either via GeoTIFF or using a grid format that works between GMT and QGIS, which is for 2.10 at least, the older "classic" GMT grid format. I would certainly suggest working with GMT ( http://gmt.soest.hawaii.edu/ ). Lester On 3 February 2016 at 02:38, Grant Boxer <box...@iinet.net.au> wrote: > I have a total magnetic intensity image and would like to create a first > vertical derivative of the image. I have found the hillshade, slope and > aspect operations and wondered what is the best to use as 1VD process? > > > > Grant Boxer > > Consultant Geologist (FAIG R.P. Geo) > > Perth, Western Australia > > > > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: http://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
