NAME

       gdal_utilities - GDAL Utilities A collection of GDAL related programs.

       The following utility programs are distributed with GDAL.

       • gdalinfo - Report information about a file.
       • gdal_translate - Copy a raster file, with control of output format.
       • gdaladdo - Add overviews to a file.
       • gdalwarp - Warp an image into a new coordinate system.
       • gdaltindex - Build a MapServer raster tileindex.
       • gdalbuildvrt - Build a VRT from a list of datasets.
       • gdal_contour - Contours from DEM.
       • gdaldem - Tools to analyze and visualize DEMs.
       • rgb2pct - Convert a 24bit RGB image to 8bit paletted.
       • pct2rgb - Convert an 8bit paletted image to 24bit RGB.
       • gdal_merge - Build a quick mosaic from a set of images.
       • gdal2tiles - Create a TMS tile structure, KML and simple web viewer.
       • gdal_rasterize - Rasterize vectors into raster file.
       • gdaltransform - Transform coordinates.
       • nearblack - Convert nearly black/white borders to exact value.
       • gdal_retile - Retiles a set of tiles and/or build tiled pyramid levels.
       • gdal_grid - Create raster from the scattered data.
       • gdal_proximity - Compute a raster proximity map.
       • gdal_polygonize - Generate polygons from raster.
       • gdal_sieve - Raster Sieve filter.
       • gdal_fillnodata - Interpolate in nodata regions.
       • gdallocationinfo - Query raster at a location.
       • gdalsrsinfo - Report a given SRS in different formats. (GDAL >= 1.9.0)
       • gdalmove - Transform the coordinate system of a file (GDAL >= 1.10)
       • gdal_edit - Edit in place various information of an existing GDAL dataset (projection, geotransform,
         nodata, metadata)
       • gdal_calc - Command line raster calculator with numpy syntax
       • gdal_pansharpen - Perform a pansharpen operation.
       • gdal-config - Get options required to build software using GDAL.
       • gdalmanage - Identify, copy, rename and delete raster.
       • gdalcompare - Compare two images and report on differences.

Creating New Files

       Access an existing file to read it is generally quite simple. Just indicate the name of the file or
       dataset on the command line. However, creating a file is more complicated. It may be necessary to
       indicate the the format to create, various creation options affecting how it will be created and perhaps
       a coordinate system to be assigned. Many of these options are handled similarly by different GDAL
       utilities, and are introduced here.
       -of format
           Select the format to create the new file as. The formats are assigned short names such as GTiff (for
           GeoTIFF) or HFA (for Erdas Imagine). The list of all format codes can be listed with the --formats
           switch. Only formats list as '(rw)' (read-write) can be written.
       Starting with GDAL 2.3, if not specified, the format is guessed from the extension (previously was
       generally GTiff for raster, or ESRI Shapefile for vector).
       -co NAME=VALUE
           Many formats have one or more optional creation options that can be used to control particulars about
           the file created. For instance, the GeoTIFF driver supports creation options to control compression,
           and whether the file should be tiled.
       The creation options available vary by format driver, and some simple formats have no creation options at
       all. A list of options supported for a format can be listed with the '--format <format>' command line
       option but the web page for the format is the definitive source of information on driver creation
       options. See format specific documentation for legal creation options for each format
       -a_srs SRS
           Several utilities, (gdal_translate and gdalwarp) include the ability to specify coordinate systems
           with command line options like -a_srs (assign SRS to output), -s_srs (source SRS) and -t_srs (target
           SRS).
       These utilities allow the coordinate system (SRS = spatial reference system) to be assigned in a variety
       of formats.
       • NAD27/NAD83/WGS84/WGS72: These common geographic (lat/long) coordinate systems can be used directly by
         these names.
       • EPSG:n: Coordinate systems (projected or geographic) can be selected based on their EPSG codes, for
         instance EPSG:27700 is the British National Grid. A list of EPSG coordinate systems can be found in the
         GDAL data files gcs.csv and pcs.csv.
       • PROJ.4 Definitions: A PROJ.4 definition string can be used as a coordinate system. For instance
         '+proj=utm +zone=11 +datum=WGS84'. Take care to keep the proj.4 string together as a single argument to
         the command (usually by double quoting).
       • OpenGIS Well Known Text: The Open GIS Consortium has defined a textual format for describing coordinate
         systems as part of the Simple Features specifications. This format is the internal working format for
         coordinate systems used in GDAL. The name of a file containing a WKT coordinate system definition may
         be used a coordinate system argument, or the entire coordinate system itself may be used as a command
         line option (though escaping all the quotes in WKT is quite challenging).
       • ESRI Well Known Text: ESRI uses a slight variation on OGC WKT format in their ArcGIS product (ArcGIS
         .prj files), and these may be used in a similar manner to WKT files, but the filename should be
         prefixed with ESRI::. For example 'ESRI::NAD 1927 StatePlane Wyoming West FIPS 4904.prj'.
       • Spatial References from URLs: For example http://spatialreference.org/ref/user/north-pacific-albers-
         conic-equal-area/.
       • filename: The name of a file containing WKT, PROJ.4 strings, or XML/GML coordinate system definitions
         can be provided.

General Command Line Switches

       All GDAL command line utility programs support the following 'general' options.
       --version
           Report the version of GDAL and exit.
       --formats
           List all raster formats supported by this GDAL build (read-only and read-write) and exit. The format
           support is indicated as follows: 'ro' is read-only driver; 'rw' is read or write (i.e. supports
           CreateCopy); 'rw+' is read, write and update (i.e. supports Create). A 'v' is appended for formats
           supporting virtual IO (/vsimem, /vsigzip, /vsizip, etc). A 's' is appended for formats supporting
           subdatasets. Note: The valid formats for the output of gdalwarp are formats that support the Create()
           method (marked as rw+), not just the CreateCopy() method.
       --format format
           List detailed information about a single format driver. The format should be the short name reported
           in the --formats list, such as GTiff.
       --optfile file
           Read the named file and substitute the contents into the command line options list. Lines beginning
           with # will be ignored. Multi-word arguments may be kept together with double quotes.
       --config key value
           Sets the named configuration keyword to the given value, as opposed to setting them as environment
           variables. Some common configuration keywords are GDAL_CACHEMAX (memory used internally for caching
           in megabytes) and GDAL_DATA (path of the GDAL 'data' directory). Individual drivers may be influenced
           by other configuration options.
       --debug value
           Control what debugging messages are emitted. A value of ON will enable all debug messages. A value of
           OFF will disable all debug messages. Another value will select only debug messages containing that
           string in the debug prefix code.
       --help-general
           Gives a brief usage message for the generic GDAL command line options and exit.