Directories Grids_B3 grids for detail area 50m flight lines on Camp Stanley Mag_Grids total magnetic field grids of entire survey area Res_Grids_200 apparent resistivity grids for 200m spaced flight lines entire survey area 50m cell size Res_Grids_filtered apparent resistivity grids for both 200m and 100m in-fill flight lines entire survey area 20m cell size Files dtm_20m.grd geosoft digital terrain model all flight lines 20m grid dtm_20m.grd.gi geosoft header file dtm_20m_s.grd geosoft shaded relief grid for digital terrain model dtm_20m_s.grd.gi geosoft header dtm_20m.flt ESRI binary grid dtm_20m.hdr ESRI header dtm_20m.flt.gi geosoft header for ESRI grid