Difference between revisions of "GDAL"
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==Glossary== | ==Glossary== | ||
| − | * [[wikipedia:Well-known_text_representation_of_geometry| | + | * WKT: [[wikipedia:Well-known text representation of coordinate reference systems|Well-known text representation of coordinate reference systems]] or [[wikipedia:Well-known_text_representation_of_geometry|wikipedia:Well-known_text_representation_of_geometry]], a text markup language for representing vector geometry objects |
* SRS: [[wikipedia:Spatial reference system|Spatial reference system]]: a complete set of parameters that determine how to associate a point on a map with a point on the Earth surface (system of coordinates, map projection, and datum). | * SRS: [[wikipedia:Spatial reference system|Spatial reference system]]: a complete set of parameters that determine how to associate a point on a map with a point on the Earth surface (system of coordinates, map projection, and datum). | ||
* [[wikipedia:Latitude|Latitude]] - there is more than one because the Earth is not a sphere | * [[wikipedia:Latitude|Latitude]] - there is more than one because the Earth is not a sphere | ||
Revision as of 13:28, 27 May 2019
Installation
Best install using standard system package manager, such as apt-get (Ubuntu), yum (Fedora), or macports (OSX).
Download
The current download page is http://download.osgeo.org/gdal/. However, web searches for the code or documentation lead to many dead links to defuncts sites. In particular, almost all links leading inside https://gdal.org/ from internet search engines are dead.
Documentation
- Web searches for "gdal documentation" are futile, but there is index to just that at https://gdal.org and wiki https://trac.osgeo.org/gdal/wiki, which also links to alternative download pages. But that wiki seems old, there is a new wiki at https://wiki.osgeo.org/wiki/Main_Page.
- The software installs without man pages and typing gdal utilities from the command line with -help gives only a brief list of options. But the following works:
- Download the appropriate version of sources as tar.gz file and expand the file
- install doxygen if needed, and type doxygen in the top directory of the source
- Open html/index.html in a web browser
- Documentation was installed as described above for version 2.4.0 and version 3.0.0
- There is https://live.osgeo.org/en/quickstart/gdal_quickstart.html
External links
- How to call gdal translate from python code
- GDAL and OGR utilities as library
- Obtain latitude and longitude from a GeoTIFF file
- https://stackoverflow.com/questions/50191648/gis-geotiff-gdal-python-how-to-get-coordinates-from-pixel
- OSGeo Python Library
- GDAL/OGR in Python (old wiki)
- https://stackoverflow.com/questions/52777153/convert-longitude-latitude-to-pixel-values-using-gdal
- https://www.geos.ed.ac.uk/~smudd/TopoTutorials/html/tutorial_raster_conversion.html
- https://pypi.org/project/geoio/
- https://gisgeography.com/free-gis-software/
- https://qgis.org
- https://www.qgistutorials.com
- The pitfalls of Lambert conformal projection in WRF and MM5
- Map projections in WRF: it's easy to get it wrong includes also examples of maps from WRF using salem
- WGS84 NAD83 simple explanations, not technical
Glossary
- WKT: Well-known text representation of coordinate reference systems or wikipedia:Well-known_text_representation_of_geometry, a text markup language for representing vector geometry objects
- SRS: Spatial reference system: a complete set of parameters that determine how to associate a point on a map with a point on the Earth surface (system of coordinates, map projection, and datum).
- Latitude - there is more than one because the Earth is not a sphere