Somehow the mailing list fell out of the cc... sorry. Yes, I know about gdal, but I wanted a fully automated solution within geotools. Hence, asking if it is possible to read in only a part of a geoTiff (or any other source of coverage). I assume a somehow similar mechanism must work behind tiled data sources (I did not used tiled tiffs with a shapefile index in my geotools code yet, hints welcome) I have my own workaround for the moment.
Cheers M. On 5/4/2010 5:42 PM, [email protected] wrote: > I think this one http://www.gdal.org/gdal_translate.html will be your > friend. > > Quoting Martin Tomko <[email protected]>: > >> Yeah, I have a single geoTiff, but huge - these are SRTM tiles for >> europe. I need to run a batch on many small areas (avg about 20*20 >> pixels, in random locations), so I don't really want to pre-process. >> Unless I could read in a virtual - tiled model... How do you go about >> it? >> >> My thinking was that I would check for clusters and clip out only the >> areas that will be used. >> In general, I think it would be a nice function - just checking its >> possibility. >> >> Cheers, >> Martin >> >> On 5/4/2010 4:43 PM, [email protected] wrote: >>> A possibility would be to use gdal_retile.py to create smaller tiles. >>> >>> Quoting Martin Tomko <[email protected]>: >>> >>>> Hi All, >>>> just a question - is it possible to read only a part of a geoTiff >>>> into a >>>> GridCoverage2D? I have tiles that are rather large, and storgin >>>> them in >>>> memory seems like an overkill if I know I will only need small-ish >>>> bits. >>>> I know the bounding bouxo f the are I am interested in, and I could >>>> easily create a (referenced) envelope. Is there any way to read in >>>> bits >>>> of the coverage within the area of interest? A comment in the Javadoc >>>> seems to indicate that the AbstractGridCoverage from which the GeoTIFF >>>> reader inherits does not allow this. >>>> >>>> Cheers >>>> Martin >>>> >>>> ------------------------------------------------------------------------------ >>>> >>>> _______________________________________________ >>>> Geotools-gt2-users mailing list >>>> [email protected] >>>> https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users >>>> >>> >>> >>> >>> ---------------------------------------------------------------- >>> This message was sent using IMP, the Internet Messaging Program. >>> >>> >>> >>> > > > > ---------------------------------------------------------------- > This message was sent using IMP, the Internet Messaging Program. > > > > -- Martin Tomko Postdoctoral Research Assistant Geographic Information Systems Division Department of Geography University of Zurich - Irchel Winterthurerstr. 190 CH-8057 Zurich, Switzerland email: [email protected] site: http://www.geo.uzh.ch/~mtomko mob: +41-788 629 558 tel: +41-44-6355256 fax: +41-44-6356848 ------------------------------------------------------------------------------ _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
