Re: [gdal-dev] Map algebra

2016-04-07 Thread Ari Jolma
08.04.2016, 02:21, alex kirjoitti: That is one aspect, yes. However, so far I've considered only operations on one or two bands at time. Operations on more than two can of course be dissolved into a series of operations with max two at a time. That will often be possible, but not always. For ins

Re: [gdal-dev] Map algebra

2016-04-07 Thread alex
> > That is one aspect, yes. However, so far I've considered only operations on > one > or two bands at time. Operations on more than two can of course be dissolved > into a series of operations with max two at a time. That will often be possible, but not always. For instance how would you diss

Re: [gdal-dev] ISO WKT in gdal 2.0

2016-04-07 Thread Newcomb, Doug
Thanks! Will pass along. Doug On Thu, Apr 7, 2016 at 4:55 PM, Even Rouault wrote: > Le jeudi 07 avril 2016 22:44:03, Newcomb, Doug a écrit : > > Hi Folks, > > I had an acquaintance in USGS ask me whether gdal 2.0+uses ISO WKT or is > > still using OGC WKT . > > > > I did see the discussion at

Re: [gdal-dev] ISO WKT in gdal 2.0

2016-04-07 Thread Even Rouault
Le jeudi 07 avril 2016 22:44:03, Newcomb, Doug a écrit : > Hi Folks, > I had an acquaintance in USGS ask me whether gdal 2.0+uses ISO WKT or is > still using OGC WKT . > > I did see the discussion at > http://osgeo-org.1560.x6.nabble.com/gdal-dev-New-OGC-standard-about-WKT-for > -projections-td52

[gdal-dev] ISO WKT in gdal 2.0

2016-04-07 Thread Newcomb, Doug
Hi Folks, I had an acquaintance in USGS ask me whether gdal 2.0+uses ISO WKT or is still using OGC WKT . I did see the discussion at http://osgeo-org.1560.x6.nabble.com/gdal-dev-New-OGC-standard-about-WKT-for-projections-td5204937.html and the project on the 2016 Summer of Code list, https://trac

Re: [gdal-dev] Map algebra

2016-04-07 Thread Ari Jolma
07.04.2016, 18:27, alex kirjoitti: Hi Ari, Sorry for responding to your message late. I do appreciate your initiative to facilitate map algebra in GDAL. No worries, the initiative and RFC will be active for some time still and decisions on it are still in the future. What exactly do you

Re: [gdal-dev] gdal_contour out of memory

2016-04-07 Thread Stefan Ziegler
Hi it seems that it has to do something with no-data areas. gdal_contour tries to calculate all the contours from approx. 450m up to my no-data value -3.4...e+38. I use no gdal_fillnodata.py to fill the no data areas. So I still think there is a slighly different behaviour of gdal since my last

Re: [gdal-dev] Map algebra

2016-04-07 Thread alex
Hi Ari, Sorry for responding to your message late. I do appreciate your initiative to facilitate map algebra in GDAL. What exactly do you mean by Map Algebra? I understand it to cover the following: 1. Local operations: pixel-by-pixel operations on raster bands. 2. Focal operations: operations

Re: [gdal-dev] gdal_contour out of memory

2016-04-07 Thread Joaquim Luis
Another option is to use GMT grdcontour program gmt grdcontour 6800_2480.tif -C1 -Dlixo.dat -V it creates a ~8.3 Mb ascii file with a memory consuption of ~50 Mb (Task manager info) that you can later convert to shp with ogr2ogr Stefan, I have problems creating contours with gdal_contour

Re: [gdal-dev] Negative NoData Value with Signed Byte Raster

2016-04-07 Thread Jason Greenlaw - NOAA Affiliate
Yes, I have used QGIS, and it works perfectly. However, my requirement is to create map services using ArcGIS Server, so unfortunately QGIS isn't an option for this task. Thanks, Jason On Thu, Apr 7, 2016 at 9:46 AM, Jerl Simpson wrote: > Just out of curiosity, have you tried using QGIS? > It

Re: [gdal-dev] Negative NoData Value with Signed Byte Raster

2016-04-07 Thread Jerl Simpson
Just out of curiosity, have you tried using QGIS? It might solve the issue for you...or might just be a goose chase. Jerl Simpson V.P. Systems Engineering Weather Trends Internationalhttp://www.weathertrends360.com/ This communication is privileged and may contain confidential information. It's i

Re: [gdal-dev] Negative NoData Value with Signed Byte Raster

2016-04-07 Thread Jason Greenlaw - NOAA Affiliate
Trent, I am able to load the VRT in ArcMap, and while it does now recognize -128 as the NoData value, it is identifying the raster as unsigned byte despite the section workaround given by Even, and thus does not properly respect the NoData areas. This is strange since it recognizes the original

Re: [gdal-dev] gdal_contour out of memory

2016-04-07 Thread Even Rouault
Stefan, > I have problems creating contours with gdal_contour and some tiff files. > The following command > > gdal_contour -i 1.0 6800_2480.tif out.shp > > ends with "0Killed" after eating all memory and all swap. It happens with > gdal 1.11 and gdal-master. It did work on a Ubuntu 10.04 machin

[gdal-dev] gdal_contour out of memory

2016-04-07 Thread Stefan Ziegler
Hi I have problems creating contours with gdal_contour and some tiff files. The following command gdal_contour -i 1.0 6800_2480.tif out.shp ends with "0Killed" after eating all memory and all swap. It happens with gdal 1.11 and gdal-master. It did work on a Ubuntu 10.04 machine (as far as I reme