2012/5/4 Jason Roberts
> it accepts an unlimited number of layers, performs the intersection or
> union
> of all of them, and creates one (new) output.
> The main obvious downside of that is having to create and manage the
> temporary outputs.
Currently the output layer is not checked fo
On Thu, May 3, 2012 at 8:35 AM, Jonathan Greenberg wrote:
> Gdalers:
>
> I'm working on some parallel processing routines via rgdal and R, but
> thought this question was better answered here. I'm trying to find out
> which raster formats are simply a flat binary file an a header. ENVI is the
>
On Fri, May 4, 2012 at 12:22 AM, Billy Newman wrote:
> I did not know that existed. A couple quick questions.
>
> 1. I do not want to store the entire raster file in the database. I just
> want to store the metadata, i.e. the bounding info and projection of the
> image file. The GeoRaster driv
I did not know that existed. A couple quick questions.
1. I do not want to store the entire raster file in the database. I just want
to store the metadata, i.e. the bounding info and projection of the image file.
The GeoRaster driver documentation made it seem like the entire raster file is
On Thu, May 3, 2012 at 11:04 PM, Jason Roberts wrote:
> As I mentioned, I do not have a strong opinion about the value of accepting
> multiple inputs. The obvious workaround is to call the same method in a
> loop. The main obvious downside of that is having to create and manage the
> temporary out
Hi Ari,
Thanks for your response, and for implementing Symmetrical Difference.
Regarding multiple inputs to Intersect and Union. ArcGIS does not use an
in-place pattern either. Instead, rather than accepting two layers as input,
it accepts an unlimited number of layers, performs the intersection
Jonathan,
The same also for the IDRISI .rst + .rdc format.
An example header (.rdc) ASCII file looks like below.
The short ref. system item names a file in a library supplied with the IDRISI
distribution.
The GDAL Idrisi driver recognises a subset of these
file format : Idrisi Raster A.1
file t
Hi Jonathan!
On Thu, 3 May 2012 10:35:57 -0500, Jonathan Greenberg wrote:
> I'm working on some parallel processing routines via rgdal and R, but
> thought this question was better answered here. I'm trying to find
> out which raster formats are simply a flat binary file an a header.
> ENVI is th
Billy,
The GeoRaster driver will do that for you. It takes the EPSG Authority code
from the input file and use it as SRID when loading the image to the database
sdo_georaster object. For more info: http://gdal.org/frmt_georaster.html
Regards,
Ivan
> ---Original Message---
> From:
I have some image files (geotiff's) and I would like to store some of the
metadata about the image files in oracle spatial. Is there any way to get
the SRID for an image file?
Thanks,
Billy
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Gdalers:
I'm working on some parallel processing routines via rgdal and R, but
thought this question was better answered here. I'm trying to find out
which raster formats are simply a flat binary file an a header. ENVI is
the one that springs to mind. We're trying to work up which files can be
On 05/02/2012 09:56 PM, Jason Roberts wrote:
1. Would you consider implementing a Symmetrical Difference method? It is
the only one from the ArcGIS Overlay toolset that you did not implement
(except Spatial Join, which does not really apply here).
I've added SymDifference method to the patch. I
Selon Ari Jolma :
> Even,
>
> I've uploaded a version, which fixes these. I added a note that GEOS is
> required, as these probably segfault without it (the methods return
> NULLs and not geometries).
Hi,
Hum, I didn't think at crashes. I thought that the algorithm would just nicely
fail. But ye
Even,
I've uploaded a version, which fixes these. I added a note that GEOS is
required, as these probably segfault without it (the methods return
NULLs and not geometries).
I added a simple test against a pre-computed layer envelope, and it
speeds up the computation in my test case ~30%. Sti
Including the patch, the driver tries to find .sdw, .sidw, .wld, and .j2w
files if no geotransform is found in the base file.
On Thu, May 3, 2012 at 1:43 AM, Jukka Rahkonen wrote:
> the Old Topo Depot novacell.com> writes:
>
> >
> >
> > Ticket http://trac.osgeo.org/gdal/ticket/4651 opened with
On 05/03/2012 11:27 AM, Peter Halls wrote:
Ari,
as a user (and teacher of users), I would urge you to keep to the
model where the output is always a new object (actually the same as
ArcGIS), rather than consider modifying an input for any of these
spatial operations. That automatically s
Ari,
as a user (and teacher of users), I would urge you to keep to the model
where the output is always a new object (actually the same as ArcGIS),
rather than consider modifying an input for any of these spatial
operations. That automatically solves the read-only input issue.
Best wishes,
Selon Ari Jolma :
>
> The performance is anyway an internal issues and the main thing is to
> get the API and logic acceptable.
Yes, that's what I meant. Those ideas can be kept in mind for later
improvements.
>
> Ari
>
>
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