Hello Javed, The grids look different because they are derived differently.
In the case of the 1d FFT, the vertical derivative is being calculated from line data. When it is gridded you tend get a lot of point features, because you are gridding a derived product, with higher frequency content than the original. The gridding algorithms don't work very well in that scenario. Magmap is deriving its derivative from a grid, which is two dimensional, and is typically rather heavily filtered when compared to line data. There is a lot more continuity across lines because that's what gridding (ideally) does. Hope this helps. Marc Pelletier Marc Pelletier, P. Geo. Nutana Geophysics Saskatoon, SK tel: (306) 931-6853 cell: (306) 260-6022 On 14/04/2014 8:18 AM, javed khana wrote: > Hello Forum members, > While calculating FVD from magmap and 1dFFT menu, I am getting > different looking grids. > Any help why does it happens? > > Regards, > J. Khan > > > > <http://sigads.rediff.com/RealMedia/ads/click_nx.ads/www.rediffmail.com/signatureline.htm@Middle?> > > > Get your own *FREE* website, *FREE* domain & *FREE* mobile app with > Company email. > *Know More >* > <http://track.rediff.com/click?url=___http://businessemail.rediff.com/company-email-hosting-services?sc_cid=sign-1-10-13___&cmp=host&lnk=sign-1-10-13&nsrv1=host> > > > > --- > > Forum archives can be accessed here: > http://lyris.geosoft.com/read/?fourm=geonet > > You are currently subscribed to geonet as: [email protected] > <mailto:[email protected]>. > > To subscribe or unsubscribe from any of our forums, select the User > Forum selection on the Geosoft Community page: > http://www.geosoft.com/support/community > --- Forum archives can be accessed here: http://lyris.geosoft.com/read/?fourm=geonet You are currently subscribed to geonet as: [email protected]. To subscribe or unsubscribe from any of our forums, select the User Forum selection on the Geosoft Community page: http://www.geosoft.com/support/community
