GDAL and PROJ Libraries Integrated with GRASS GIS for Terrain Modelling of the Georeferenced Raster Image

Libraries with pre-written codes optimize the workflow in cartography and reduce labour intensive data processing by iteratively applying scripts to implementing mapping tasks. Most existing Geographic Information System (GIS) approaches are based on traditional software a graphical user’s interface which significantly limits their performance. Although plugins proposed improve functionality of many GIS programs, they usually ad hoc finding specific solutions, e.g., cartographic projections conversion. We address this limitation principled approach Geospatial Data Abstraction Library (GDAL), library for conversions between (PROJ) Resources Analysis Support (GRASS) geospatial morphometric analysis. This research presents topographic analysis dataset using scripting methods include several tools: (1) GDAL, translator raster vector formats used converting Earth Global Relief Model (ETOPO1) GeoTIFF XY Cartesian coordinates into World Geodetic 1984 (WGS84) ‘gdalwarp’ utility; (2) PROJ projection transformation ETOPO1 WGS84 grid (Cassini–Soldner equirectangular, Equal Area Cylindrical, Two-Point Equidistant Azimuthal, Oblique Mercator); (3) GRASS sequential use following modules: r.info, d.mon, d.rast, r.colors, d.rast.leg, d.legend, d.northarrow, d.grid, d.text, g.region, r.contour. The depth frequency was analysed module ‘d.histogram’. provided systematic way measuring combine advantages PROJ, tools that informativeness, effectiveness, representativeness spatial processing. included computed slope, aspect, profile, tangential curvature study area. revealed distribution pattern data: 24% elevations below 400 m, 13% depths −5000 −6000 4% have values −3000 −4000 least frequent (−6000 7000 m) <1%, 2% −2000 3000 m basin, while other distributed proportionally. Further, incorporating generic coordinate transformed various demonstrate distortions shape Scripting techniques demonstrated applications modelling shows effectiveness visualization, compatibility libraries (GDAL, PROJ), technical flexibility combining Graphical User Interface (GUI), command-line contributes development.