[GeoNode-users] can't see the layers preview in the "explore layer" page - partially SOLVED

[Ivan Marchesini]

Thanks Paolo..
Ciao

Il Gio 30 Nov 2017, 23:09 Paolo Corti <pcorti at gmail.com> ha scritto:

> Ciao Ivan
> this looks like a bug to me. Thumbnails should be rendered also for
> layers with a srid different than 4326.
> I will file a ticket and see if there is an easy way to fix it.
> thanks for reporting
> p
>
> On Sun, Nov 26, 2017 at 3:27 PM, Ivan Marchesini
> <ivan.marchesini at gmail.com> wrote:
> > Hi Francesco...
> >
> > Bingo!!!
> > Thank you
> >
> > Testing the countries of Natural earth I have seen that the thumbs was
> > created. So I decided to try again with my data..
> >
> > it seems that, in order to generate the thumbnails the layers must be in
> > epsg:4326 !!!!! This is true for vector and raster data (shapefiles and
> tiff
> > at least).
> > In precedence I have tested only with data in epsg:32633 (UTM/WGS84, zone
> > 33) and other CRS but now I see that WGS84 lat/long is the only CRS in
> which
> > Geonode is able to generate the thumbs..
> > It is not perfect since we have to re-project the data and that can
> generate
> > some problems (re-interpolation algorithms for raster, datum
> transformation
> > errors), however it is good enough for starting...
> >
> > do you think it is a bug or a well known feature?
> > do you think it can be solved?
> >
> > thank you again
> > Ivan
> >
> >
> >
> > On 26/11/2017 18:33, Francesco Bartoli wrote:
> >
> > Ivan,
> >
> > given your answers then, assuming your are testing with the same datasets
> > ever, can you try with different data? Maybe classic shapefile like
> > countries from natural earth.
> >
> > Francesco
> >
> > Il giorno 26/nov/2017, alle ore 15:33, Ivan Marchesini
> > <ivan.marchesini at gmail.com> ha scritto:
> >
> > Hi Toni,
> >
> > thank you very much for your answer...
> >
> >
> > - Browser cache. (Delete it)
> > - a not writeable thumbs dir (checkit)
> >
> >
> > thank you for the hints
> > I have cleaned the browser cache but the problem is still there: the
> > thumbnails exist but they are png images completely white
> > The thumbs dir has the following rules
> >
> > ls -al /var/www/geonode/uploaded/
> >
> > drwxrwxrwx 4 www-data www-data 4096 nov 24 13:51 .
> > drwxr-xr-x 5 www-data root     4096 nov 24 13:50 ..
> > drwxrwxrwx 2 www-data www-data 4096 nov 25 19:20 layers
> > drwxrwxrwx 2 www-data www-data 4096 nov 26 15:08 thumbs
> >
> > I think they are fine...
> >
> > Moreover I have tested that the thumbnails of the maps are correctly
> created
> > and, if I'm not wrong, they are stored in the same folder of the layers
> > thumbs
> >
> >
> > what else you can do is check the thumbnail url and see if the image
> exists
> > on your
> > drive.
> >
> >
> > Yes, thank you.
> > The files exist but they are white png images
> >
> > An easy way is as already suggested to use the browser console. Or to
> > navigate
> > to a layer in django admin: http://YOURURL/admin/layers/layer/1/
> >
> >
> > yes... the thumb file is there:
> > uploaded/thumbs/layer-40a378c6-d20d-11e7-a6fc-0050568d40c1-thumb.png
> >
> >
> > thank you again...
> > any idea or strategy for understanding the problem is welcome
> >
> > best regards
> > Ivan
> >
> >
> >
> >
> > cheers,
> >
> > Toni
> >
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> > Am 26.11.2017 um 07:13 schrieb geonode-users-request at lists.osgeo.org:
> >
> > Message: 3
> > Date: Sat, 25 Nov 2017 18:19:39 +0100
> > From: Ivan Marchesini <ivan.marchesini at gmail.com>
> > To: geonode-users at lists.osgeo.org
> > Subject: [GeoNode-users] can't see the layers preview in the "explore
> >        layer"  page
> > Message-ID: <a52ee523-8cc1-b518-5875-bf0f5efaac8e at gmail.com>
> > Content-Type: text/plain; charset=utf-8; format=flowed
> >
> > Dear Geonode users,
> >
> > after a fresh installation of Geonode 2.6 on ubuntu 16.04 I'm doing some
> > tests and it seems I can't see the thumbnail of the uploaded layers in
> > the "explore later" page...
> >
> > is this something that you have already observed?
> >
> > many thanks
> >
> > Ivan
> >
> >
> >
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> >
> >
> >
> >
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> >
>
>
>
> --
> Paolo Corti
> Geospatial software developer
> web: http://www.paolocorti.net
> twitter: @capooti
> skype: capooti
>
-- 

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