A fast and memory-limited landmask based on GSHHG and OpenStreetMap for determing whether a point on Earth is on land or in the ocean.
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Aug 10, 2026 - Rust
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gshhg
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GMT (Generic Mapping Tools) shell script drawing a coastline globe map in an orthographic azimuthal (globe-view) projection centred on the North Pacific, as a locator / projection demonstration.
cartography geoscience globe generic-mapping-tools gmt world-map shell-scripting map-projection orthographic-projection geospatial-visualization locator-map coastlines azimuthal-projection gshhg pscoast
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Sep 12, 2026 - Shell
GMT (Generic Mapping Tools) shell scripts producing oblique Mercator (-JOc) coastline basemaps rotated to follow ocean-trench axes / great-circle lines, with graticules and toponymy, for trench regions and a world overview.
cartography geoscience generic-mapping-tools scientific-visualization geodesy projection gmt shell-scripting basemap great-circle bathymetry toponymy map-projection geospatial-visualization coastlines marine-geophysics gshhg ocean-trenches pscoast oblique-mercator
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Sep 12, 2026 - Shell
GMT (Generic Mapping Tools) shell scripts drawing oblique Mercator (-JOc) coastline basemaps of the Kuril-Kamchatka and Mariana Trenches, with the projection axis aligned to each trench and graticules, scale bars and toponymy.
cartography geoscience generic-mapping-tools scientific-visualization geodesy projection gmt shell-scripting basemap great-circle bathymetry map-projection geospatial-visualization coastlines marine-geophysics gshhg ocean-trenches mariana-trench pscoast oblique-mercator
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Sep 12, 2026 - Shell
GMT (Generic Mapping Tools) configuration and environment-setup shell script: setting GMT config parameters and data directories (gmt set), locating and downloading remote data such as global relief and GSHHG shorelines (gmt which / gmt get), and exporting GSHHG shoreline data.
workflow command-line cartography geospatial configuration geoscience generic-mapping-tools data-management gmt shell-scripting environment-setup gshhg gmt-defaults shoreline-data earth-relief
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Sep 12, 2026 - Shell
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.
cartography geoscience generic-mapping-tools geophysics scientific-visualization gmt shell-scripting topography shoreline bathymetry map-projection raster-processing geospatial-visualization land-sea-mask land-mask gshhg grid-processing coastline-masking raster-masking grdlandmask
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Sep 12, 2026 - Shell
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