GMT (Generic Mapping Tools) shell scripts producing bathymetric contour (isobath) maps of ocean trenches from ETOPO relief, with annotated index contours on an Albers equal-area conic projection and study-area outlines.
cartography geoscience generic-mapping-tools geophysics digital-elevation-model gmt shell-scripting geomorphometry bathymetry map-projection geospatial-visualization marine-geophysics grid-processing contour-mapping ocean-trenches etopo1 albers-projection bathymetric-contours isobaths grdcontour
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Updated
Sep 12, 2026 - Shell