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GDAL/OGR

GDAL/OGR. GDAL/OGR GDAL/OGR : Frank Warmerdam Tools for reading, writing, and processing GDAL - Geospatial Data Abstraction Library Raster OGR - OpenGIS Simple Features Reference Vector. GDAL/OGR Started in 1998 by Frank Warmerdam as a sole developer

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GDAL/OGR

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  1. GDAL/OGR

  2. GDAL/OGR • GDAL/OGR : Frank Warmerdam • Tools for reading, writing, and processing • GDAL - Geospatial Data Abstraction Library • Raster • OGR - OpenGIS Simple Features Reference • Vector

  3. GDAL/OGR Started in 1998 by Frank Warmerdam as a sole developer Now a project under OSGeo's umbrella Has ~20 contributing developers

  4. A Workhorse for a lot of GIS's!

  5. A Workhorse for a lot of GIS's! Used by many FOSS and proprietary software packages http://trac.osgeo.org/gdal/wiki/SoftwareUsingGdal QGIS ArcGIS GRASS GIS FME MapServer ISRISI MapGuide Google OSSIM ERDAS OpenEV gvSIG

  6. A Workhorse for a lot of GIS's! • Also available as command line utilities via: • OsGeo • FWTools – Frank Warmerdam tools

  7. Corporate Sponsors

  8. OGR Tools for manipulating vector data Over 40 vector data formats supported Commandline Utilities ogrinfo - Lists information about an OGR supported data source ogr2ogr - Converts simple features data between file formats ogrtindex - Creates a tileindex

  9. GDAL Tools for manipulating raster data Over 100 raster data formats supported

  10. GDAL Command Line Utilities gdalinfo - report information about a file. gdal_translate - Copy a raster file, with control of output format. gdaladdo - Add overviews to a file…pyramids gdalwarp - Warp an image into a new coordinate system. gdal_contour - Contours from DEM. 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.

  11. GDAL Command Line Utilities gdal_merge.py - Build a quick mosaic from a set of images. gdal_rasterize - Rasterize vectors into raster file. gdaltransform - Transform coordinates. nearblack - Convert nearly black/white borders to exact value. gdal_grid - Create raster from the scattered data. gdal_polygonize.py - Generate polygons from raster. gdal_sieve.py - Raster Sieve filter. gdal_fillnodata.py - Interpolate in nodata regions. gdal-config - Get options required to build software using GDAL.

  12. GDAL / OGR Utilities • Often used programmatically • Batch geoprocessing scripts • Background processing for web mapping apps • Incorporated into scripts for larger workflows

  13. Availability Packages FWTools OSGeo4W Desktops Used by QGIS, GRASS, etc. Operating Systems Windows (32 & 64 bit), MAX OS X, Linux

  14. Support/ Help Listserve Wiki Code Snippets

  15. Support/ Help Utility Documentation

  16. In Class GDAL/OGR Exercise

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