Andreas, You're running 64bit SAGA, right? (if not sure, click the question mark on the menu bar, and click "About" - should be towards the top).
I actually like SAGA because I can throw pretty giant files at it. Just to test out and make sure, I just loaded in a 10GB GeoTIFF with integer values, and did a single value reclass that took about 3 minutes. You likely need ample RAM and disk space, but given that you do, it should be feasible. [Watching the system resources, you can see the respective amount of memory get taken up as you work with data in SAGA] The 4GB limit seems like it could be a 32 bit issue. I was using the latest version of SAGA (2.1.3), 64 bit, downloaded from: http://sourceforge.net/projects/saga-gis/files/SAGA%20-%202.1/SAGA%202.1.3/ If you're really stuck and need to knock this task out of the way - if you can get me the data I can do the reclass for you. hope that helps, mike On Tue, Nov 18, 2014 at 10:04 AM, Andreas Neumann <[email protected]> wrote: > Hi Carlos, > > I reprojected to a different swiss projection system and the expression > still does not work. I tested various projections, including UTM-32N. Very > strange ... > > There clearly seems to be a bug in the raster calculator. I will open a > bug with high priority. > > Thanks for testing and helping! > > Andreas > > > Am 2014-11-18 15:36, schrieb Carlos Cerdán: > >> Hi Andreas: >> >> It is solved: you have to reproject your TEMP layer. I've tried with >> UTM-32N zone and raster calculator works fine. >> >> Why raster calculator (and SAGA) doesn't work with your original CRS? >> Well, I don't know, perhaps devs group have the answer. >> >> It was a good challenge. >> >> Carlos >> >> 2014-11-18 4:37 GMT-05:00 Andreas Neumann <[email protected]>: >> >> Hi Carlos, >>> >>> Thank you for your help! >>> >>> I tried with >>> >>> (TEMP@1=249)*255 + (TEMP@1<249)*TEMP@1 + (TEMP@1>249)*TEMP@1 >>> >>> My layer is called "temp". However, the resulting file contains all >>> 0. >>> >>> I tried in both QGIS 2.4 and 2.6. >>> >>> Is there something wrong with the input file? It was generated from >>> a PDF with ghostscript. Here is the metadata: >>> >>> ----- >>> >>> GDAL provider >>> GTiff >>> GeoTIFF >>> Datensatzbeschreibung >>> //gis/gis/mapserverdata/uep/release_2014_11/temp.tif >>> TIFFTAG_DATETIME=2014:11:17 09:50:08 >>> TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch) >>> TIFFTAG_SOFTWARE=GPL Ghostscript 9.10 >>> TIFFTAG_XRESOLUTION=600 >>> TIFFTAG_YRESOLUTION=600 >>> Kanal 1 >>> STATISTICS_MAXIMUM=255 >>> STATISTICS_MEAN=247.18714741724 >>> STATISTICS_MINIMUM=0 >>> STATISTICS_STDDEV=37.198102288306 >>> Dimensionen >>> X: 71575 Y: 70867 Kanäle: 1 >>> Leerwert >>> *Leerwert nicht gesetzt* >>> Datentyp >>> Byte - Acht Bit vorzeichenlose Ganzzahl >>> Pyramidenübersichten >>> Räumliches Bezugssystem des Layers >>> +proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 >>> +k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel >>> +towgs84=674.4,15.1,405.3,0,0,0,0 +units=m +no_defs >>> Layerausdehnung (in urspünglicher Projektion des Layers) >>> 0.0000000000000000,-70867.0000000000000000 : >>> 71575.0000000000000000,0.0000000000000000 >>> Kanal >>> Kanal 1 >>> Kanal Nr >>> 1 >>> Keine Statistik >>> Noch keine Statistik gesammelt >>> >>> ------------ >>> >>> Thanks again if you have any idea what may be wrong with my file or >>> the above listed raster calc statement. >>> >>> Andreas >>> >>> Am 2014-11-17 18:38, schrieb Carlos Cerdán: >>> >>> Hi Andreas: >>> >>> I think QGIS raster calculator can make this job. Conditional >>> syntax >>> is a little bit... different. The sentence that can do it is: >>> >>> (TIFF=249)*255 + (TIFF<249)*TIFF + (TIFF>249)*TIFF >>> >>> Where TIFF is your raster layer. The trick is: if the sentence in >>> parentheses is true, it gets value 1, else zero; so we have to >>> multiply by 255 to replace the 249 values. Next we have to add the >>> other values. >>> >>> Good luck, >>> >>> Carlos Cerdán >>> >>> PD. Please let me know if i'm wrong with this suggestion >>> >>> 2014-11-17 12:02 GMT-05:00 Andreas Neumann <[email protected]>: >>> >>> Hi, >>> >>> I have a very simple task (at least I thought it is simple), but am >>> not able to do it properly. >>> >>> I have a grayscale tiff value where I would like to replace the >>> value of 249 with 255 - all other values should stay as they are. >>> >>> I tried with gdal "nearblack", but nothing changed - I started a >>> separate email-thread about that at the gdal list. >>> >>> Then I tried with the QGIS raster calculator - but it does not >>> support conditional syntax. >>> >>> I tried with Processing and GRASS - but it would stop at 8% - the >>> file is quite big. >>> >>> Finally I came across SAGA "Reclassify with grid value". The >>> dialogue is very complicated and hard to understand. After a while >>> it would stop with an error message telling me that Saga may not be >>> properly configured - but it says that it is properly installed. >>> Quite confusing ... >>> >>> I am trying on Win7 64bit. >>> >>> If the file wouldn't be so big I would try this task in The Gimp - >>> where it is very simple to replace one pixel values with another - >>> using "Select by color" and "fill with a specific color". >>> >>> Any idea how I could achieve my task with GDAL, QGIS, GRASS or >>> Saga? >>> >>> Thanks, >>> Andreas >>> >>> _______________________________________________ >>> Qgis-user mailing list >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/qgis-user [1] [1] >>> >>> Links: >>> ------ >>> [1] http://lists.osgeo.org/mailman/listinfo/qgis-user [1] >>> >>> _______________________________________________ >>> Qgis-user mailing list >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/qgis-user [1] >>> >> >> _______________________________________________ >> Qgis-user mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/qgis-user [1] >> >> >> Links: >> ------ >> [1] http://lists.osgeo.org/mailman/listinfo/qgis-user >> >> _______________________________________________ >> Qgis-user mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/qgis-user >> > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user >
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