oid the inefficiency. I'll try to see if increasing
the CACHE_MAX might do this 'on the fly' without me having to worry about
the alignment of the block definitions.
Regards,
Rutger
--
View this message in context:
http://osgeo-org.1560.x6.nabble.com/gdal-dev-
Hi Yuta
Thanks! I'll try this.
I'm still wondering which approach is faster: With gdal or rasterio...
Cheers, Stefan
2015-04-03 17:46 GMT+02:00 Yuta Sato :
>
>
> On Fri, Apr 3, 2015 at 11:08 PM, Stefan Keller wrote:
>>
>> Hi Yuta and Even
>>
>> Excuse me when I creep in that discussion - but I
On Fri, Apr 3, 2015 at 11:08 PM, Stefan Keller wrote:
> Hi Yuta and Even
>
> Excuse me when I creep in that discussion - but I'm acutally having
> quite a similar beginners question (I'm rather a vector guy :-) ):
>
> Yuta: Can you post the code fragment here in order to make benchmarks?
>
> I h
Hi Stefan
You propably want to take a look at rasterio: https://github.com/mapbox/rasterio
Which is also great to work with python and raster data.
Regards
Stefan
Von meinem iPhone gesendet
> Am 03.04.2015 um 16:08 schrieb Stefan Keller :
>
> Hi Yuta and Even
>
> Excuse me when I creep in th
Hi Yuta and Even
Excuse me when I creep in that discussion - but I'm acutally having
quite a similar beginners question (I'm rather a vector guy :-) ):
Yuta: Can you post the code fragment here in order to make benchmarks?
I have a GeoTIFF (representing heights from SRTM3) in Mercator CRS of
the
Thank you very much "Even Rouault" for making me understood.
On Fri, Apr 3, 2015 at 8:13 PM, Even Rouault
wrote:
> Le vendredi 03 avril 2015 12:46:48, Yuta Sato a écrit :
> > Dear Even Rouault:
> >
> > Thank you very much.
> > What about setting these parameters "used with .ReadAsArray()", thoug
Le vendredi 03 avril 2015 12:46:48, Yuta Sato a écrit :
> Dear Even Rouault:
>
> Thank you very much.
> What about setting these parameters "used with .ReadAsArray()", though I
> did not know their meanings?
> buf_xsize=None, buf_ysize=None, buf_obj=None
(Please keep the list CC'ed)
buf_xsize an
Le vendredi 03 avril 2015 12:22:00, Yuta Sato a écrit :
> Dear Respected GDAL Developers and Users:
>
> What parameters should I set beforehand in order to accelerate the reading
> of a GeoTiff file?
>
> I am using as follows:
>
> data = src_dataset.GetRasterBand(1).ReadAsArray(xoff,yoff,xsize,y
Dear Respected GDAL Developers and Users:
What parameters should I set beforehand in order to accelerate the reading
of a GeoTiff file?
I am using as follows:
data = src_dataset.GetRasterBand(1).ReadAsArray(xoff,yoff,xsize,ysize)
Does setting the following parameters accelerate?
GDAL_CACHEMAX,
Le vendredi 22 mars 2013 18:47:49, Diego Gnesi Bartolani a écrit :
> Hi,
>
> I'm programming in Python and I need to "scan" a large image with GDAL
> reading n rows at the time. I'm using the ReadAsArray method, but every
> time I execute it I get a new array. I think this solution consumes a
Hi Diego,
I haven't checked this out, but my guess is that you should make a
(python)list of the arrays if you need to keep them. If you don't need to
keep them, you might try to del(ete) myarray before the next ReadAsArray
call.
Of course there is a lower level function which accepts an address a
Hi,
I'm programming in Python and I need to "scan" a large image with GDAL
reading n rows at the time. I'm using the ReadAsArray method, but every
time I execute it I get a new array. I think this solution consumes a lot
of resources.
Is there a method or option to pass to ReadAsArray an array
2011/10/21 Frank Warmerdam
>
> If the problem with your script persists when using the OSGeo4W
> python environment then I should be able to reproduce it with a
> suitable bug report. If it does not happen with OSGeo4W then
> the issue likely relates to Tamas's use of SWIG version for the
> pytho
2011/10/21 Frank Warmerdam
> On Fri, Oct 21, 2011 at 6:34 AM, Discourse Maps
> wrote:
> > Hi,
> >
> > I was wondering if the issue mentioned in a past thread has every been
> > addressed.
> >
> http://osgeo-org.1803224.n2.nabble.com/Gdal-Python-Win7-crash-with-ReadAsArray-td4398401.html
> >
> >
Oct 21, 2011 at 10:36 AM, Discourse Maps wrote:
> Sure. Though I'm not too saavy with the open source programming.
> How do I go about acquiring and installing OSGeo4W binaries?
>
>> Date: Fri, 21 Oct 2011 10:14:39 -0700
>> Subject: Re: [gdal-dev] ReadAsArray with Wind
On Fri, Oct 21, 2011 at 6:34 AM, Discourse Maps wrote:
> Hi,
>
> I was wondering if the issue mentioned in a past thread has every been
> addressed.
> http://osgeo-org.1803224.n2.nabble.com/Gdal-Python-Win7-crash-with-ReadAsArray-td4398401.html
>
> I am having much the same issues with GDAL 1.6.1,
Hi,
I was wondering if the issue mentioned in a past thread has every been
addressed.
http://osgeo-org.1803224.n2.nabble.com/Gdal-Python-Win7-crash-with-ReadAsArray-td4398401.html
I am having much the same issues with GDAL 1.6.1, Windows 7, and using
'ReadAsArray'. Python crashes almost ever
Even
Thanks for pointing that out. I have now been able to solve that problem by
keeping the dataset in scope...
Riaan
On Fri, Sep 3, 2010 at 7:52 PM, Even Rouault
wrote:
> Riann,
>
> hum, I think you've hit a classical problem with the use of the GDAL python
> bindings. The root of your proble
Riann,
hum, I think you've hit a classical problem with the use of the GDAL python
bindings. The root of your problem is likely the following line:
reader = RasterReaderWriter(gdal.Open(iFilename).GetRasterBand(1))
Currently the GDAL python bindings do a poor job with life cycle management of
Thanks for the suggestion.
I have tried:
tileRaster = self.raster.ReadAsArray(xoff=offsetX, yoff=offsetY,
win_xsize=width, win_ysize=height)
and
tileRaster = self.raster.ReadAsArray(xoff=offsetX, yoff=offsetY,
buf_xsize=width, buf_ysize=height)
but the result is something like:
(array([],
I have recently started a new open-source project that will use gdal
extensively, named scikits.eartho.
The vision is to implement some advanced algorithms and ideas that we
develop and work with at the South African Satellite Applications Centre
(SAC) for use in Python (SciPy).
I am experiencing
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