Section 1: user commands and tools
NAME grdraster – Extract subregion from a binary raster and save as a GMT grid SYNOPSIS grdraster [ filenumber | "text pattern" ] region [ grdfile ] [ increment ] [ parameters ] [ [level] ] [ -bo<binary> ] [ -do<nodata> ] [ -o<flags> ] Note: No space is allowed between the option flag and…
NAME grdproject – Forward and inverse map transformation of grids SYNOPSIS grdproject in_grdfile out_grdfile parameters [ [dx/dy] ] [ xinc[unit][=|+][/yinc[unit][=|+]] ] [ dpi ] [ [c|i|p|e|f|k|M|n|u] ] [ ] [ c|i|p ] [ region ] [ [level] ] [ -n<flags> ] [ -r ] Note: No space is allowed between the option flag and the…
NAME grdpmodeler – Evaluate a plate model on a geographic grid SYNOPSIS grdpmodeler agegrdfile rot_file -Sflags [ polygonfile ] [ outgrdfile ] [ age ] [ [level] ] [ -b<binary> ] [ -d<nodata> ] [ -h<headers> ] [ -i<flags> ] [ -:[i|o] ] Note: No space is allowed between the option flag and the associated…
NAME grdpaste – Join two grids along their common edge SYNOPSIS grdpaste file_a.nc file_b.nc outfile.nc [ [level] ] [ -f<flags> ] Note: No space is allowed between the option flag and the associated arguments. DESCRIPTION grdpaste will combine file_a.nc and file_b.nc into outfile.nc by pasting them together along their common edge. Files file_a.nc and file_b.nc…
NAME grdmath – Reverse Polish Notation (RPN) calculator for grids (element by element) SYNOPSIS grdmath [ min_area[/min_level/max_level][+ag|i|s |S][+r|l][ppercent] ] [ resolution[+] ] [ increment ] [ ] [ ] [ region ] [ [level] ] [ -bi<binary> ] [ -di<nodata> ] [ -f<flags> ] [ -h<headers> ] [ -i<flags> ] [ -n<flags> ] [ -r…
NAME grdmask – Create mask grid from polygons or point coverage SYNOPSIS grdmask pathfiles mask_grd_file] increment region [ [m|p|x|y] ] [ [z|Z|p|P]values ] [ search_radius[unit] ] [ [level] ] [ -bi<binary> ] [ -di<nodata> ] [ -f<flags> ] [ -g<gaps> ] [ -h<headers> ] [ -i<flags> ] [ -r ] [ -x[[-]n] ] [ -:[i|o]…
NAME grdlandmask – "Create a ""wet-dry"" mask grid from shoreline data base" SYNOPSIS grdlandmask mask_grd_file xinc[unit][=|+][/yinc[unit][=|+]] west/east/south/north[r] [ min_area[/min_level/max_level][+ag|i|s |S][+r|l][ppercent] ] [ resolution[+] ] [ maskvalues[o] ] [ [level] ] [ -r ] Note: No space is allowed between the option flag and the associated arguments. DESCRIPTION grdlandmask reads the selected shoreline database and uses…
NAME grdinfo – Extract information from grids SYNOPSIS grdinfo grdfiles [ ] [ ] [ [dx[/dy]|r|b] ] [ [0|1|2] ] [ ] [ region ] [ [s]dz ] [ [level] ] [ -f<flags> ] Note: No space is allowed between the option flag and the associated arguments. DESCRIPTION grdinfo reads a 2-D binary grid file…
NAME grdimage – Project grids or images and plot them on maps SYNOPSIS grdimage grd_z | grd_r grd_g grd_b [ out_img=driver ] [ cpt ] [ [r] ] [ i[|dpi] ] parameters [ [f|b]color ] [ intensfile|intensity ] [ z|-Zparameters ] [ ] [ ] [ ] [ ] [ ] [ ] [ west/east/south/north[/zmin/zmax][r]…
NAME grdhisteq – Perform histogram equalization for a grid SYNOPSIS grdhisteq in_grdfile [ out_grdfile ] [ n_cells ] [ [file] ] [ [norm] ] [ ] region [level] Note: No space is allowed between the option flag and the associated arguments. DESCRIPTION grdhisteq allows the user to find the data values which divide a given…
NAME grdgravmag3d – Compute the gravity effect of a grid by the method of Okabe SYNOPSIS grdgravmag3d grdfile_top [grdfile_bot] [ density ] [ thick ] [ xy_file ] [ outgrid ] [ <…> ] [ increment ] [ z_obs ] [ [nn_pad]|[pad_dist]|[<w/e/s/n>] ] [ region ] [ radius ] [ [level] ] [ level[b|t] ]…
NAME grdgradient – Compute directional derivative or gradient from a grid SYNOPSIS grdgradient in_grdfile out_grdfile [ azim[/azim2] ] [ [a][c][o][n] ] [ [s|p]azim/elev[/ambient/diffuse/specular/shine] ] [ flag ] [ [e][t][amp][/sigma[/offset]] ] [ region ] [ slopefile ] [ [level] ] [ -fg ] [ -n<flags> ] Note: No space is allowed between the option flag and…
NAME grdflexure – Compute flexural deformation of 3-D surfaces for various rheologies SYNOPSIS grdflexure topogrd rm/rl[/ri]/rw Te[u] outgrid [ Nx/Ny/Nxy ] [ ppoisson ] [ yYoung ] [ nu_a[/h_a/nu_m] ] [ list ] [ [f|q|s|nx/ny][+a|d|h|l][+e|n|m][+twidth][+w[suffix]][+z[p]] [ beta ] [ -Tt0[u][/t1[u]/dt[u]|n][+l] ] [ [level] ] [ wd] [ zm] [ -fg ] Note: No space is…
NAME grdfilter – Filter a grid in the space (or time) domain SYNOPSIS grdfilter ingrid distance_flag xwidth[/width2][modifiers] outgrid [ increment ] [ i|p|r ] [ region ] [ ] [ [level] ] [ -f<flags> ] Note: No space is allowed between the option flag and the associated arguments. DESCRIPTION grdfilter will filter a grid file…
NAME grdfft – Do mathematical operations on grids in the wavenumber (or frequency) domain SYNOPSIS grdfft ingrid [ ingrid2 ] outfile [ azimuth ] [ zlevel ] [ [scale|g] ] [ [r|x|y][w[k]] ] [ [r|x|y]params ] [ [scale|g] ] [ [f|q|s|nx/ny][+a|d|h|l][+e|n|m][+twidth][+w[suffix]][+z[p]] ] [ scale ] [ [level] ] [ -fg ] Note: No space is…
NAME grdedit – Modify header or content of a grid SYNOPSIS grdedit grid [ ] [ xname/yname/zname/scale/offset/invalid/title/remark ] [ [a|h|l|r|t|v] ] [ outgrid ] [ parameters ] [ table ] [ region ] [ ] [ ] [ [level] ] [ -bi<binary> ] [ -di<nodata> ] [ -f<flags> ] [ -i<flags> ] [ -:[i|o] ]…
NAME grdcut – Extract subregion from a grid SYNOPSIS grdcut ingrid outgrid region [ [nodata] ] [ [n]lon/lat/radius[unit] ] [ [level] ] [ [n|r]min/max ] [ -f<flags> ] Note: No space is allowed between the option flag and the associated arguments. DESCRIPTION grdcut will produce a new outgrid file which is a subregion of ingrid….
NAME grdconvert – Convert between different grid formats SYNOPSIS grdconvert ingrdfile[=id[/scale/offset[/NaNvalue]]] outgrdfile[=id[/scale/offset[/NaNvalue]][:driver[/datatype]]] [ ] [ region ] [ [level] ] [ -f<flags> ] Note: No space is allowed between the option flag and the associated arguments. DESCRIPTION grdconvert reads a grid file in one format and writes it out using another format. As an option…
NAME grdcontour – Make contour map using a grid SYNOPSIS grdcontour grid [+]cont_int|cpt parameters [ [–|[+]annot_int][labelinfo] ] [ [p|s]parameters ] [ <template> ] [ [l|r] ] [ [d|f|n|l|L|x|X]params ] [ z|Zparameters ] [ ] [ low/high ] [ ] [ ] [ cut ] [ west/east/south/north[/zmin/zmax][r] ] [ smoothfactor ] [ [+|-][+dgap[/length]][+l[labels]] ] [ [just/dx/dy/][c|label]…
NAME grdclip – Clip the range of grids SYNOPSIS grdclip ingrid outgrid [ region ] [ ahigh/above ] [ blow/below ] [ ilow/high/between ] [ rold/new ] [ [level] ] Note: No space is allowed between the option flag and the associated arguments. DESCRIPTION grdclip will set values < low to below and/or values >…