Re: [JPP-Devel] problems with old image loader

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Hi,

This one seems to be of type "float32".  It is not very common tiff type and I accept that core OpenJUMP readers cannot open it because OJ itself cannot do anything sensible with such an image. I do not know about Sextante and if it is also lacking support fot float32 images or if there is some bug in how OJ is using Sextante.
>From my experience I would really suggest to learn also GDAL and add into your open source GIS toolbox. Or actually you have it already because QGIS is using. I guess that by converting that SRTM tiff into int32 type with gdal_translate or with QGIS you could do the further processing with OJ and Sextante.

-Jukka Rahkonen-

________________________________
Praveen Sinha wrote:

> Hi,
Attachment is the SRTM download TIFF file. I am unable to open it in OJ. But the file opened in QGIS where I generated contour upon.
OJ throws error: - All factories fail for the operation "fileload".

I appreciate OJ & Sextante. So I don't want to switch to other software.
Please.
P.K.Sinha

--- On Thu, 11/29/12, Stefan Steiniger <ss...@ge...> wrote:

From: Stefan Steiniger <ss...@ge...>
Subject: Re: [JPP-Devel] problems with old image loader
To: "OpenJump develop and use" <jum...@li...>
Date: Thursday, November 29, 2012, 7:06 PM

finally my 2 cents:

with the sextante toolbox you can do some of that stuff in OJ as well.
At least I used Sextantes contouring functions on (pseudo) DEMs to
create home range polygons for animal movement data (with the HoRAE
toolbox for OJ).

However, when I prepared recently maps with hillshade and color ramps
for TileMill (i.e. for our web maps) I used gdal as well and followed
those instructions:

http://mapbox.com/tilemill/docs/guides/terrain-data/

except that I adjusted the color ramp for our area.
...In case Jukka hasn't seen it yet - though I bet ;)

cheers,
stefan

Am 29.11.12 07:04, schrieb Rahkonen Jukka:
> Sorry, I forgot to say that by "that tiff file" I was meaning the file I downloaded from
> http://srtm.csi.cgiar.org/SRT-ZIP/SRTM_V41/SRTM_Data_GeoTiff/srtm_40_01.zip
>
> It may or may not be similar to what Praveen Sinha was meaning.
>
> -Jukka-
>
>> -----Alkuperäinen viesti-----
>> Lähettäjä: Rahkonen Jukka [mailto:Juk...@mm...<UrlBlockedError.aspx>]
>> Lähetetty: 29. marraskuuta 2012 11:54
>> Vastaanottaja: 'OpenJump develop and use'
>> Aihe: Re: [JPP-Devel] problems with old image loader
>>
>> Hi,
>>
>> That tiff file is a 16-bit grayscale image. It can be opened in OpenJUMP with
>> Open - Sextante image but the tiff file is not worth much as an image
>> because tiff is here actually a delivery medium for a grid based data -
>> elevation values at each image pixel.  For visualizing the height values there
>> exist a lot of tools but I have tried just a few of them ever.  Gdal_contour can
>> create vector countour lines http://www.gdal.org/gdal_contour.html.  Then
>> there is a feature rich toolbox for making raster image visualizing
>> http://www.gdal.org/gdaldem.html
>>
>> I made two quick trials:
>> Create 100 contour lines in shapefile format with 100 meter intervals
>> gdal_contour -a elev srtm_40_01.tif test.shp -i 100
>>
>> Create a hillshade image with default settings, resulting tiff opens with OJ
>> gdaldem hillshade srtm_40_01.tif hillshade.tif
>>
>>
>> -Jukka Rahkonen-
>>
>>
>>
>>> -----Alkuperäinen viesti-----
>>> Lähettäjä: edg...@we...<UrlBlockedError.aspx> [mailto:edg...@we...<UrlBlockedError.aspx>]
>>> Lähetetty: 29. marraskuuta 2012 11:15
>>> Vastaanottaja: OpenJump develop and use
>>> Aihe: Re: [JPP-Devel] problems with old image loader
>>>
>>> sorry, what is a "SRTM download TIF"?
>>> http://wiki.openstreetmap.org/wiki/SRTM ?
>>>
>>> jukka: could you give him a hint on how to convert it?
>>> sinha: what is the exact error using the latest snapshot?
>>>
>>> .. ede
>>>
>>> On 29.11.2012 04:58, Praveen Sinha wrote:
>>>> Hi,
>>>> I too not able to open SRTM download TIF image in OJ. Please see to it.
>>>> Thanks.
>>>>
>>>> P.K.Sinha
>>>>
>>>> --- On *Wed, 11/28/12, Rahkonen Jukka
>>> /<Juk...@mm...<UrlBlockedError.aspx>>/* wrote:
>>>>
>>>>
>>>>      From: Rahkonen Jukka <Juk...@mm...<UrlBlockedError.aspx>>
>>>>      Subject: Re: [JPP-Devel] problems with old image loader
>>>>      To: "'OpenJump develop and use'" <jump-pilot-
>>> de...@li...<UrlBlockedError.aspx>>
>>>>      Date: Wednesday, November 28, 2012, 7:28 PM
>>>>
>>>>      Hi,
>>>>
>>>>      You developers can perhaps say if imageIO-ext could be usable
>>>> with
>>> OpenJUMP.
>>>>      http://docs.codehaus.org/display/GEOTOOLS/ImageIO-EXT+GDAL
>>>>
>>>>      -Jukka-
>>>>
>>>>      > -----Alkuperäinen viesti-----
>>>>      > Lähettäjä: Stefan Steiniger [mailto:ss...@ge...<UrlBlockedError.aspx>
>>> <http://us.mc1621.mail.yahoo.com/mc/compose?to=ss...@ge...>]
>>>>      > Lähetetty: 28. marraskuuta 2012 14:58
>>>>      > Vastaanottaja: OpenJump develop and use
>>>>      > Aihe: Re: [JPP-Devel] problems with old image loader
>>>>      >
>>>>      > email - list message:
>>>>      >
>>>>      > Hi Ede, Jukka and Michael,
>>>>      >
>>>>      > I kind of agree with Ede to close the bug, if we have a proper message
>>>>      > returned and OJ does not hang. Loading that specific type of
>>>> tiff or png
>>> data
>>>>      > is rather a feature request.
>>>>      >
>>>>      > However, for me important too is what Jukka found: That next
>>>> time we
>>> can
>>>>      > suggest to the user to explore & transform with gdal into a different
>>>>      > (LZW-free?) format. I actually had problems with lzw tiffs and
>>>> the old
>>> image
>>>>      > loader earlier too (= years ago).
>>>>      >
>>>>      > Maybe, for a windows user, we also could recommmend that
>>>> gdal/ogr
>>> based
>>>>      > file converter by Larry Becker (or was it vector only?).
>>>>      >
>>>>      > thanks to all for looking into that issue!!!
>>>>      > stefan
>>>>      >
>>>>      > ------------------------------------------------------------------------------
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