GDAL Utility Functions

Functions for working with geospatial data using GDAL/OGR capabilities.

Core GDAL Tools

• gdaltranslate - Convert raster data between different formats
• gdalwarp - Image reprojection and warping
• gdaldem - Tools to analyze and visualize DEMs
• ogr2ogr - Convert vector data between file formats

Geometric Operations

• arccircle - Create circular arcs
• arcellipse - Create elliptical arcs
• boundary - Compute geometry boundary
• buffer - Create buffer around geometry
• buffergeo - Geographic buffer operations
• centroid - Compute centroid of geometry
• circgeo - Geographic circles
• concavehull - Compute concave hull
• convexhull - Compute convex hull
• delaunay - Delaunay triangulation
• envelope - Compute bounding envelope
• envelope3d - Compute 3D bounding envelope
• polygonize - Convert raster to polygons
• polyunion - Union of polygons
• simplify - Simplify geometry

Spatial Relationships

• contains - Test if geometry contains another
• crosses - Test if geometries cross
• disjoint - Test if geometries are disjoint
• equals - Test if geometries are equal
• intersects - Test if geometries intersect
• overlaps - Test if geometries overlap
• touches - Test if geometries touch
• within - Test if geometry is within another

Distance & Area Calculations

• distance - Compute distance between geometries
• geodesicarea - Compute geodesic area
• geomarea - Compute geometry area
• geomlength - Compute geometry length

Geodetic Operations

• geod - Geodesic calculations
• geodesic - Geodesic line operations
• invgeod - Inverse geodesic calculations
• loxodrome - Loxodrome (rhumb line) calculations
• loxodrome_direct - Direct loxodrome problem
• loxodrome_inverse - Inverse loxodrome problem

Projection & Coordinate Functions

• epsg2proj - Convert EPSG code to PROJ string
• epsg2wkt - Convert EPSG code to WKT
• lonlat2xy - Convert lon/lat to projected coordinates
• proj2wkt - Convert PROJ string to WKT
• setproj! - Set projection for data
• wkt2proj - Convert WKT to PROJ string
• xy2lonlat - Convert projected coordinates to lon/lat

Set Operations

• difference - Compute difference of geometries
• intersection - Compute intersection of geometries
• symdifference - Compute symmetric difference

Data Processing

• dither - Apply dithering to image
• fillnodata - Fill nodata values in raster

GMT Integration

• gd2gmt - Convert GDAL dataset to GMT object
• gdalshade - Create shaded relief
• gdalread - Read geospatial data with GDAL
• gdalwrite - Write geospatial data with GDAL
• gmt2gd - Convert GMT object to GDAL dataset

Miscellaneous

• pointalongline - Get point at distance along line