Using GDAL In Your GIS Workflow

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The document provides an overview of using GDAL in GIS workflows, highlighting its capabilities for data manipulation, conversion, and geoprocessing. It outlines the installation and basic functions available in GDAL, along with Python bindings for enhanced functionality and batch processing. Training opportunities and resources for further learning are also mentioned.

Using GDAL in Your GIS Workflow:An OSGeo Approach

A little about me...President and Lead Consultant at Carteryx15 years experience using geospatial technologiesInvolved in forestry, mining, engineering, environmental and many other sectors...Have used open source GIS for past 10 yearsGIS development and deployment specialistExperience in a number of software platforms

IntroductionA GIS is only as good as the data that goes in to it...Preparing data can take time...time you may not haveGDAL utilities can run at command line or as libraryProjection conversion, format conversion, sub-set...Bindings for Python and dll’s for Visual Studio

AgendaWhat is GDAL?Acquiring and Installing GDAL and it’s associated utilitiesGetting basic raster and vector informationConverting between raster file typesConverting between vector file typesBasics of GDAL/OGR/OSR Python bindingsSample Python code to get metadata from series of rasters

GEOSPATIAL DATA ABSTRACTION LIBRARY (GDAL)

Command LineMany commands availableogr2ogr – convert between data types, coordinate systems etc.gdalinfo – get summary or comprehensive metadata from raster data setsgdaltindex – create a MapServer style raster index shapefilegdaltransform – transform coordinates between spatial reference systemsPython scriptsgdal_merge.py – quick merge of multiple raster images to one imagegdal2tiles.py – create multiple tiles from a single rastergdal2xyz.py – create xyz text file from raster

GDAL Bindings in PythonWhat are GDAL Python BindingsGDAL/OGR/OSR libraries that are accessible to PythonGives data manipulation capabilities to PythonHow do they work?Calls to the libraries in the code...fromosgeo.gdalimport * or importosgeo.gdalasosrfrom osgeo.ogr import * or import osgeo.ogr asogrfrom osgeo.osr import * or import osgeo.osr asosrWhat is the big advantage?Batch processing and combining with built-in python functions

GDAL Bindings in PythonWhat can you do with bindings/dllsGDALAdd bandsManipulate bandsCreate rastersRe-project rastersand moreOGRGeoprocessing (union, intersection, buffer etc.)Get information (dataset, layers, features)Re-projectChange data type

Creating Our First Python/GDAL appOff we go to the demo...

A number of tools already available for command line

Using GDAL In Your GIS Workflow

1. Using GDAL in Your GIS Workflow:An OSGeo Approach

2. A little about me...President and Lead Consultant at Carteryx15 years experience using geospatial technologiesInvolved in forestry, mining, engineering, environmental and many other sectors...Have used open source GIS for past 10 yearsGIS development and deployment specialistExperience in a number of software platforms

3. IntroductionA GIS is only as good as the data that goes in to it...Preparing data can take time...time you may not haveGDAL utilities can run at command line or as libraryProjection conversion, format conversion, sub-set...Bindings for Python and dll’s for Visual Studio

4. AgendaWhat is GDAL?Acquiring and Installing GDAL and it’s associated utilitiesGetting basic raster and vector informationConverting between raster file typesConverting between vector file typesBasics of GDAL/OGR/OSR Python bindingsSample Python code to get metadata from series of rasters

5. GEOSPATIAL DATA ABSTRACTION LIBRARY (GDAL)

6. File Types

7. Acquiring GDAL/OGR

8. Installing GDAL/OGR

9. Installing GDAL/OGR

10. Command LineMany commands availableogr2ogr – convert between data types, coordinate systems etc.gdalinfo – get summary or comprehensive metadata from raster data setsgdaltindex – create a MapServer style raster index shapefilegdaltransform – transform coordinates between spatial reference systemsPython scriptsgdal_merge.py – quick merge of multiple raster images to one imagegdal2tiles.py – create multiple tiles from a single rastergdal2xyz.py – create xyz text file from raster

11. Command LineOff we go to the demo...

12. GDAL Bindings in PythonWhat are GDAL Python BindingsGDAL/OGR/OSR libraries that are accessible to PythonGives data manipulation capabilities to PythonHow do they work?Calls to the libraries in the code...fromosgeo.gdalimport * or importosgeo.gdalasosrfrom osgeo.ogr import * or import osgeo.ogr asogrfrom osgeo.osr import * or import osgeo.osr asosrWhat is the big advantage?Batch processing and combining with built-in python functions

13. GDAL Bindings in PythonWhat can you do with bindings/dllsGDALAdd bandsManipulate bandsCreate rastersRe-project rastersand moreOGRGeoprocessing (union, intersection, buffer etc.)Get information (dataset, layers, features)Re-projectChange data type

14. Creating Our First Python/GDAL appOff we go to the demo...

15. SummaryWhy GDAL/OGR/OSR?

16. Open source and free

17. A number of tools already available for command line

18. Integrates in many programming languages

19. Many geoprocessing functions and objects

20. Why Python?

21. Runs in many different environments (Windows – Linux – Mac/OS)

22. Well established programming language

23. Integrates with Qt and other bindings to increase flexibility and useMore InformationHow to get more training....Contact Carteryx @ [email protected] or 778.668.5025More training classes to come (watch http://www.carteryx.com)Pre-defined and Personalized training....Linkshttp://fwtools.maptools.org/http://map.hut.fi/doc/Geo-GDAL/html/namespace_geo.htmlhttp://trac.osgeo.org/osgeo4w/http://www.python.orghttp://www.diveintopython.org/

24. More InformationQuestions????

Using GDAL In Your GIS Workflow

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