grid-processing

GMT (Generic Mapping Tools) shell scripts extracting and stacking serial cross-track bathymetric profiles across the Kuril-Kamchatka Trench (north and south segments) with grdtrack, plotting median stacked profiles with error envelopes over a shaded-relief basemap.

GMT (Generic Mapping Tools) shell scripts building 3D perspective relief models of the Kuril-Kamchatka Trench: grdview topographic/bathymetric meshes from ETOPO relief overlaid on 2D EGM96 geoid contours, rendered at two perspective azimuths (135 and 165 degrees).

GMT (Generic Mapping Tools) shell scripts mapping ten TerraClimate climate variables over Mongolia for 2019 (min/max temperature, precipitation, soil moisture, wind, solar radiation, SWE, vapour pressure, VPD, PDSI drought index) from NetCDF grids with DCW country clipping. Figures for Lemenkova, Geosciences 2022, 12(3):140.

GMT (Generic Mapping Tools) shell script processing the GLOBE DEM (Global Land One-km Base Elevation, 30 arc-second): converting raw 16-bit signed-integer binary tiles to GMT .grd grids with xyz2grd, batch mosaicking to a global XYZ, and rendering the relief.

GMT (Generic Mapping Tools) shell scripts applying histogram equalization to topography/bathymetry grids with grdhisteq, comparing original, equalized, Gaussian-normalized and quadratic transforms of ETOPO1 relief in multi-panel figures.

GMT (Generic Mapping Tools) shell script converting a regularly-spaced XYZ bathymetry table directly to a NetCDF grid with xyz2grd (exact grid registration, no interpolation), then contour-mapping the result for the Kuril-Kamchatka Trench.

GMT (Generic Mapping Tools) shell scripts gridding scattered XYZ bathymetry with the nearneighbor local nearest-neighbour / sector-search algorithm and contour-mapping the result for the Kuril-Kamchatka and Mariana Trenches.

GMT (Generic Mapping Tools) shell script mapping the geographic layout of 25 cross-section profiles along the Mariana Trench, plotting profile transects as oriented vectors on an Albers equal-area contour basemap from ETOPO1 relief.

GMT (Generic Mapping Tools) shell script building a faceted side-by-side comparison figure: two map panels contrasting gridding algorithms (xyz2grd direct conversion vs nearneighbor interpolation) of the same Kuril-Kamchatka Trench bathymetry, with shared captions and title.

GMT (Generic Mapping Tools) shell scripts computing the 2D-FFT spectral coherence between marine gravity and bathymetry grids (isostasy / flexural response) with grdfft, plus multi-panel maps of bathymetry, geoid, free-air gravity and vertical gravity gradient.

GMT shell scripts mapping eleven TerraClimate climate variables over Botswana (temperature, precipitation, soil moisture, PET/AET, radiation, vapour pressure, VPD, wind, PDSI) from NetCDF grids, plus a topographic base map. Figures for Lemenkova, ISPRS Int. J. Geo-Inf. 2022, 11(9):473.

GMT (Generic Mapping Tools) shell scripts demonstrating coastline-based raster clipping (pscoast clip paths) to render a colour geoid over the ocean and gray-shaded relief over masked land, for the Kuril-Kamchatka and Mariana Trenches.

GMT (Generic Mapping Tools) shell scripts interpolating scattered XYZ topography and gravity to continuous grids with blockmean and the surface adjustable-tension continuous-curvature spline algorithm, then shading and mapping the modelled surfaces of the Kuril-Kamchatka and Mariana Trenches.

GMT (Generic Mapping Tools) shell scripts mapping ETOPO1 bathymetry of the Mariana Trench in three contrasting map projections: Cassini transverse cylindrical (-JC), Cylindrical Equal-Area Gall-Peters (-JY) and Polyconic (-JPoly), with colour scale, contours, toponymy and geometric-shape annotation.

GMT (Generic Mapping Tools) shell scripts mapping marine magnetic anomalies from the EMAG2 (v3) and WDMAM global magnetic-anomaly grids over ocean basins and trenches, with cyclic colour-shaded grids, contours and cartographic layout.

GMT (Generic Mapping Tools) shell scripts mapping the age of oceanic lithosphere, seafloor-spreading half-rates, spreading asymmetry and age uncertainty from the NOAA/NGDC (Muller et al.) ocean crustal-age grid over ocean basins, with turbo colour-shaded grids and cartographic layout.

Over 30 GMT (Generic Mapping Tools) shell scripts building 3D perspective relief models: grdview-rendered topographic and bathymetric meshes and surfaces from ETOPO/GEBCO grids at set azimuth and elevation, often overlaid on 2D geoid contours, for ocean trenches, seas and countries.

GMT (Generic Mapping Tools) shell scripts rendering 3D bar histograms of bathymetric depth values: relief grids converted to XYZ (grd2xyz) and drawn as perspective 3D columns with psxyz to show the spatial depth distribution of ocean trenches.

Over 80 GMT (Generic Mapping Tools) shell scripts mapping TerraClimate climate variables per country (temperature extremes, precipitation, PDSI drought index, soil moisture, PET/AET, runoff, shortwave radiation, snow-water equivalent, vapour pressure/deficit, wind) from NetCDF grids, with DCW country clipping, contours and cartographic layout.

GMT (Generic Mapping Tools) shell script building a land/water mask grid from GSHHG shorelines with grdlandmask (land = 1, ocean = NaN) and rendering it over an ETOPO1 relief basemap for the Kuril-Kamchatka Trench area.