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Re: [udig-devel] GeoTiff - tif + tfw
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Hi Zlatko, Jesse,
I have tested the RC10 udig and regarding to tiffs and images it shows
up the same problems: in both windows and linux the images are loaded
with an extreme slowlyness and sometimes even do not load (the jpg at
it's layer extent zoom).
To try the same, I'm testing the thing with the jpg and tiff I put here
(it is not a free dataset):
www.hydrologis.com/testfiles/udigdata.tar.gz
The JGrass way is a bit a problem, since when imported into a JGrass
workspace, the data are converted to GRASS raster format, which has a
different compression mechanism, since is uses the tiff like a dataset
and not an image. That way a tiff risks to explode. I have 300 megs of
tiffs like the ones in the example and we realized that use them in a
GRASS format, would make 10 giga out of it. So no way to handle them
like that. The GRASS format is for analysis purposes.
I too need a mechanism to load automagically tiffs (let's say given a
folder with tiffs and a file describing their position and so on) and
would be very willing to code it into udig.
However our biggest and not in short time solvable problem is that tiffs
and jpgs are not handled in the best way right now and that the new
geotools with reviewed coverage is not here and now for udig.
So what I'm really thinking of, is to code the viewer with geotools,
even if it makes me very, very sad, since I would like to put all of my
efforts into udig and only udig! Since udig is THE desktop part, udig
should be able to supply a configurable lightweight version of itself,
like for axample arcexplore (not sure it is called like that :))
What do you think? Anyone any idea on how to solve that?
Ciao,
Andrea
Zlatko Perenda probaly wrote:
> Ok, maybe I will rephrase. JGrass plugin would be great. With all the
> raster algorithms included in a plugin in udig, awsome. It would sure
> cover all my needs, maybe Andrea would know little more about it.
>
> All I need is a possibilty to load appropriate tile (world file - tif +
> tfw, ~4gb all together; I can convert them to geotiff) and project
> shapes on them. So I would like to see loading of tifs handled by udig.
> The question is how much time, of course we are talking estimations
> only, will it take to write a Jgrass plugin? And to become available for
> developing an application based on udig?
>
>
>
> Oh, your feedback is really appreciated.
>
>
>
> Zlatko.
>
>
>
>
>
> ------------------------------------------------------------------------
>
> *From:* udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx
> [mailto:udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] *On Behalf Of *Zlatko
> Perenda
> *Sent:* Wednesday, March 21, 2007 11:57 AM
> *To:* 'User-friendly Desktop Internet GIS'
> *Subject:* RE: [udig-devel] GeoTiff - tif + tfw
>
>
>
> Hi,
>
>
>
> Ok, if it is simple to fix then great.
>
>
>
> So I can expect support for geotiff , or world files (tif + tfw),
> somwhere in the upcoming fixes?
>
>
>
> Thanks.
>
>
>
> Zlatko.
>
>
>
> ------------------------------------------------------------------------
>
> *From:* udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx
> [mailto:udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] *On Behalf Of *Jesse
> Eichar
> *Sent:* Tuesday, March 20, 2007 4:51 PM
> *To:* User-friendly Desktop Internet GIS
> *Subject:* Re: [udig-devel] GeoTiff - tif + tfw
>
>
>
> Oh wow. I didn't know about this issue. It seems a simple thing to fix
> though. I'll get on it.
>
>
>
> Jesse
>
>
>
> On 20-Mar-07, at 1:09 AM, Zlatko Perenda wrote:
>
>
>
> Hi,
>
>
>
> Here is some additional info on error. Using uDig 1.1 RC9, Windows XP,
> java version "1.5.0_08" downloaded from your site.
>
> Link to sample tiff:
> http://www.terracolor.net/download/tc_sandiego_utm11_geotiff.zip . This
> one at leasts loads to some degree and then throws :
>
>
>
>
>
> _java.lang.NullPointerException_
>
>
>
> at
> net.refractions.udig.render.gridcoverage.basic.GridCoverageRendererUtils.createRenderer(
>
> _GridCoverageRendererUtils.java:37_)
>
>
>
> at
> net.refractions.udig.render.internal.gridcoverage.basic.BasicGridCoverageRenderer.prepareRender(
>
> _BasicGridCoverageRenderer.java:89_)
>
>
>
> at
> net.refractions.udig.render.internal.gridcoverage.basic.BasicGridCoverageRenderer.render(
>
> _BasicGridCoverageRenderer.java:46_)
>
>
>
> at
> net.refractions.udig.render.internal.gridcoverage.basic.BasicGridCoverageRenderer.render(
>
> _BasicGridCoverageRenderer.java:104_)
>
>
>
> at
> net.refractions.udig.project.internal.render.impl.RenderExecutorImpl$RenderJob.startRendering(
>
> _RenderExecutorImpl.java:303_)
>
>
>
> at
> net.refractions.udig.project.internal.render.impl.RenderExecutorImpl$RenderJob.run(
>
> _RenderExecutorImpl.java:358_)
>
>
>
> at org.eclipse.core.internal.jobs.Worker.run(
>
> _Worker.java:58_)
>
>
>
> My geotiff will not even try to load, it just throws an exception like
> this (can not send it, sorry) :
>
>
>
> <image002.jpg>
>
>
>
> Same error is reported as a bug here:
> http://jira.codehaus.org/browse/UDIG-1196.
>
>
>
> Zlatko.
>
>
>
>
>
> ------------------------------------------------------------------------
>
> *From:* udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx
> [mailto:udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] *On Behalf Of *Zlatko
> Perenda
> *Sent:* Tuesday, March 20, 2007 8:17 AM
> *To:* 'User-friendly Desktop Internet GIS'
> *Subject:* RE: [udig-devel] GeoTiff - tif + tfw
>
>
>
> Hi,
>
>
>
> I tried it on 1.1 RC9 and RC7, Windows XP. It does not work. I read your
> last IRC meeting and someone was also saying that it does not work on
> windows.
>
>
>
> Hm, ok , solution 1 seems ok, had a glance at Jgrass. It sure can load
> geotiff, and even does some operations on them.
>
> Solution 2 is also good, but the timeline is what concerns me.
>
>
>
> Thanks for the info.
>
>
>
> Zlatko.
>
>
>
> ------------------------------------------------------------------------
>
> *From:* udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx
> [mailto:udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] *On Behalf Of *Jesse
> Eichar
> *Sent:* Monday, March 19, 2007 6:28 PM
> *To:* User-friendly Desktop Internet GIS
> *Subject:* Re: [udig-devel] GeoTiff - tif + tfw
>
>
>
> Hi,
>
>
>
> What version of uDig are you using and what OS are you using. Geotiff
> is supported right now but it is not a very good implementation yet as
> it loads the entire raster into memory. If this is not sufficient then
> there are two solutions right now:
>
>
>
> 1. Andrea Antonello is working on JGrass Plugins for uDig which has
> JGrass support built into it.
>
> 2. uDig trunk has a pretty good implementation for viewing Geotiff
> images. 1.2 Milestone 1 is being worked on by some developers and
> should be available at some point.
>
>
>
> Jesse
>
>
>
> On 19-Mar-07, at 7:27 AM, Zlatko Perenda wrote:
>
>
>
> Hi,
>
>
>
> Just stumbled upon your udig project, very nice. Was trying to import
> some geotiff files, and I could not load them. Have been searching
> around and have seen that there is a bug commited on this subject. Also
> on compatibilty page there is short word about it, discouriging the use
> of same. And also have read the part
>
>
>
> Now my question is will geotiff files be supported in upcoming
> version(s) of udig sdk? If, when will that be, approximately?
>
>
>
> I am starting work on a new project and got tiles of geotiffs. So I have
> to work with them, using them as a background layer, projecting shapes
> on them. I am in a phase where I have to decide what to use to build my
> application (investigation), so geotiff support is a big factor in my
> decision, unless I can convert them into something readable to udig
> (don’t know).
>
>
>
> Thanks.
>
>
>
> Zlatko.
>
>
>
> _______________________________________________
>
> User-friendly Desktop Internet GIS (uDig)
>
>
>
> http://udig.refractions.net
>
> http://lists.refractions.net/mailman/listinfo/udig-devel
>
>
>
> <image002.jpg>
>
> _______________________________________________
>
> User-friendly Desktop Internet GIS (uDig)
>
> http://udig.refractions.net
>
> http://lists.refractions.net/mailman/listinfo/udig-devel
>
>
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel
--
____________________________________________________________________________
HydroloGIS - Environmental Safety Modelling
www.hydrologis.com
Andrea Antonello
Environmental Engineer
mobile: +393288497722
"Let it be as much a great honour to take as to give learning,
if you want to be called wise."
Skuggsja' - The King's mirror - 1240 Reykjavik
____________________________________________________________________________
