QGIS GDAL

What is GDAL?

GDAL (Geospatial Data Abstraction Library) is a translator library for raster and vector geospatial data formats that is released under an MIT style Open Source License by the Open Source Geospatial Foundation. It’s presents a single raster, and single vector data model.

GDAL Tools

The GDAL Tools plugin offers a GUI to the collection of tools in the Geospatial Data Abstraction Library. This tool helps you to create a contour layer, or a shaded relief from a raster DEM, also you can use for query, re-project, warp and merge a wide variety of raster formats.

List of GDAL Tools in QGIS

• Projections
• Conversion
• Extraction
• Analysis
• Miscellaneous

GDAL Raster programs

• Common options
• gdalinfo: Lists information about a raster dataset.
• gdal_translate: Converts raster data between different formats.
• gdaladdo: Builds or rebuilds overview images.
• gdalwarp: Image reprojection and warping utility.
• gdaltindex: Builds an OGR-supported dataset as a raster tileindex.
• gdalbuildvrt: Builds a VRT from a list of datasets.
• gdal_contour: Builds vector contour lines from a raster elevation model.
• gdaldem: Tools to analyze and visualize DEMs.
• rgb2pct.py: Convert a 24bit RGB image to 8bit paletted.
• pct2rgb.py: Convert an 8bit paletted image to 24bit RGB.
• gdalattachpct.py: Attach a color table to a raster file from an input file.
• gdal_merge.py: Mosaics a set of images.
• gdal2tiles.py: Generates directory with TMS tiles, KMLs and simple web viewers.
• gdal2xyz.py: Translates a raster file into xyz format.
• gdal_rasterize: Burns vector geometries into a raster.
• gdaltransform: Transforms coordinates.
• nearblack: Convert nearly black/white borders to black.
• gdal_retile.py: Retiles a set of tiles and/or build tiled pyramid levels.
• gdal_grid: Creates regular grid from the scattered data.
• gdal_proximity.py: Produces a raster proximity map.
• gdal_polygonize.py: Produces a polygon feature layer from a raster.
• gdal_sieve.py: Removes small raster polygons.
• gdal_fillnodata.py: Fill raster regions by interpolation from edges.
• gdallocationinfo: Raster query tool
• gdalsrsinfo: Lists info about a given SRS in number of formats (WKT, PROJ.4, etc.)
• gdalmove.py: Transform georeferencing of raster file in place.
• gdal_edit.py: Edit in place various information of an existing GDAL dataset.
• gdal_calc.py: Command line raster calculator with numpy syntax.
• gdal_pansharpen.py: Perform a pansharpen operation.
• gdal-config (Unix): Determines various information about a GDAL installation.
• gdalmanage: Identify, delete, rename and copy raster data files.
• gdalcompare.py: Compare two images.
• gdal_viewshed: Compute a visibility mask for a raster.
• gdal_create: Create a raster file (without source dataset).

GDAL Vector programs

• Common options
• ogrinfo: Lists information about an OGR-supported data source.
• ogr2ogr: Converts simple features data between file formats.
• ogrtindex: Creates a tileindex.
• ogrlineref: Create linear reference and provide some calculations using it.
• ogrmerge.py: Merge several vector datasets into a single one.
• ogr_layer_algebra.py: Performs various Vector layer algebraic operations.