Re: [Qgis-user] downloading a wms geoservice from QGis

[Goyo]

2016-11-07 22:18 GMT+01:00 Juliana Mori :
> Hi Andreas,
>
> for sure it would be much better to use the webservice directly but I´m
> already investigating with CARTO and it seems there´s no WMS support - if I
> have any update on this, I´ll share with you.

Maybe a bit late and a bit off-topic. CARTO supports WMS as base
layer, it must serve unprojected or web mercator images though.
https://carto.com/docs/carto-editor/maps/#including-an-external-basemap

It used to work with CARTO editor and I guess it works with CARTO builder.

Goyo
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Re: [Qgis-user] downloading a wms geoservice from QGis

[Neumann, Andreas]

Hi Juliana, 

Not sure if you figured it out already. But smaller resolution means
better quality and larger file sizes. A resolution of 0.05 degrees means
that each pixel is 0.05 degrees in width and height. Gradually make this
value smaller until you are satisfied and still works. At some point the
WMS may refuse to server or your file will get too big. 

About projection: it is generally not advised to work with EPSG:4326
projection. Depending on the area you work with, I would switch to a
meter based projection, such as UTM zones. 

Greetings, 

Andreas 

On 2016-11-07 22:33, Juliana Mori wrote:

> Yes, I did set a resolution as you explained:
> 
> I could finally get a file but the resolution is too poor (all pixelized)> I 
> tried with none compression but still not good. I guess the horizontal and 
> vertical resolutions are too low, but don´t really understand the parameter 
> to be sure what would be a good value. Any sugestions? 
> 
> 2016-11-07 19:27 GMT-02:00 Andreas Neumann :
> 
> So - have you tried setting a resolution and extent? The resolution input 
> fields need to have values. Empty fields don't work. And no - QGIS can't 
> autodetect it. It does not know the native resolution of WMS services.
> 
> Andreas
> 
> Am 07.11.2016 um 22:23 schrieb Juliana Mori: 
> sorry, I hit enter before finishing the email... Again:
> 
> Hi Andreas,
> 
> for sure it would be much better to use the webservice directly but I´m 
> already investigating with CARTO and it seems there´s no WMS support - if I 
> have any update on this, I´ll share with you.
> 
> EPSG:4326 would be perfect for me, even though I know the original file is in 
> Magna Sirgas (EPSG:4686). So, if I understood right, I need to specify a 
> resolution in decimal degrees, right?
> 
> I´m saving a raster image with only 3 color values (assigned by its column 
> "dn" which indicates if the pixels correspond to forest, no forest or no 
> information). Sorry, I don´t know to say if it´s orthoimage.
> I´ve already polygonized the other tiff files I had from this series (but 
> were not from WMS) and the results were meaningful, probably because there´re 
> only this 3 colors.  
> 
> 2016-11-07 19:18 GMT-02:00 Juliana Mori :
> 
> Hi Andreas,
> 
> for sure it would be much better to use the webservice directly but I´m 
> already investigating with CARTO and it seems there´s no WMS support - if I 
> have any update on this, I´ll share with you.
> 
> EPSG:4326 would be perfect for me, even though I know the original file is in 
> Magna Sirgas (EPSG:4686). 
> 
> 2016-11-07 19:15 GMT-02:00 Andreas Neumann :
> 
> Hi Juliana, 
> 
> First, I would investigate with Carto, if you really cannot embed a WMS. It 
> would be much better to use the webservice directly rather than downloading 
> and uploading and then end up with an outdated image. 
> 
> If that does not work, you need to set a meaningful resolution. As we can see 
> in your screenshot the resolution text input fields are empty. Also check if 
> the projection is correct. Do you really want to save in EPSG:4326 or rather 
> in a meter based system? 
> 
> What kind of data are you saving? Orthoimages or maps with few colors or 
> black and white? If it is orthoimages, I would use JPEG compression in the 
> Geotiff, otherwise probably deflate/LZW. 
> 
> Then you have to find a meaningful resolution. If you really want to save in 
> EPSG:4326, you have to specify a resolution in decimal degrees. Try with 
> larger values first, such as 0.05 and then, if it is too coarse go to smaller 
> values. 
> 
> About polygonizing raster to vector: this really depends on the content - and 
> I kind of doubt it if you really get meaningful results. Maybe it works with 
> few colors and homogeneous areas. It certainly would not work well for aerial 
> images. Hope it helps,
> Andreas
> 
> Am 07.11.2016 um 22:05 schrieb Juliana Mori: 
> Hi Andreas,
> 
> thanks for your reply.
> 
> I chose layer extent for extensions and current layer for resolution but 
> still doesn´t work. 
> 
> Should I do this in a different way?
> 
> About the bigger question, no, CARTO doesn´t allow uploading geotiffs. What 
> I´ve done so far is polygonizing the rasters in QGis and uploading the 
> converted shapefile to CARTO. As you said WMS can´t be converted into shape, 
> I´m not sure this is going to work at all... won´t I be able to polygonize a 
> raster downloaded from a WMS server?
> 
> All the best, Juliana.
> 
> 2016-11-07 18:44 GMT-02:00 Andreas Neumann :
> 
> Hi Juliana, 
> 
> "Save AS" as a WMS should work fine - but you need to specify a useful extent 
> and resolution (in map units of your projection). Otherwise it probably 
> fails. 
> 
> I just tested it and it works fine. 
> 
> The bigger question is: will CARTO allow to upload larger Geotiff files? Did 
> you check that? 
> 
> Note that WMS are always raster. You can't convert it into a shp file. 
> 
> Andreas
> 
> Am 07.11.2016 um 21:27 schrieb Juliana Mori: 
> 
> H

Re: [Qgis-user] downloading a wms geoservice from QGis

[Juliana Mori]

Hy Nyall,

thanks for the update recommendation. As soon as I finish this project, in
which I´m at the very end, I´ll sure look for the newer version ( 2.14.8).

And thanks for stoping by my page! Unfortunately, the portfolio there is
very outdated. I´ve been working with geojournalism and map visualizations
for some years now, as in the InfoAmazonia project
 for which I´m working in this specific
dataset I was asking you guys about ;)

Best, Juliana


2016-11-07 20:02 GMT-02:00 Nyall Dawson :

> On 8 Nov 2016 7:58 AM, "Nyall Dawson"  wrote:
> >
> > On 8 Nov 2016 6:27 AM, "Juliana Mori"  wrote:
> > >
> > > Hello,
> > >
> > > I have loaded a wms server to QGis, which is a raster format. As I
> need to use this in an external aplication (CARTO) which does not support
> wms, I´m trying to export the server loaded into QGIS through "save as"
> funcionality. But it´s not working.
> > >
> > > Do you know how I can export the wms loaded to a file (raster or shp)?
> > >
> > > Thanks a lot, Juliana.
> > >
> > >
> > > ps:: I´m working with QGis Essen, 2.14.3
> >
> > I'd strongly suggest an upgrade to 2.14.8 is in order. You're missing
> out on hundreds of bug fixes.
>
> By the way - I was just looking at your webpage... It's very nice work!!
>
> I'm really curious how you're using QGIS with your projects. How does it
> fit with your work?
>
> Nyall
>
> >
> > Nyall
> >
> > >
> > > --
> > > Juliana Mori
> > > www.julianamori.com
> > >
> > >
> > > ___
> > > Qgis-user mailing list
> > > Qgis-user@lists.osgeo.org
> > > List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
> > > Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
>



-- 
*Juliana Mori*
www.julianamori.com
+55 11 999653145
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Re: [Qgis-user] downloading a wms geoservice from QGis

[Nyall Dawson]

On 8 Nov 2016 7:58 AM, "Nyall Dawson"  wrote:
>
> On 8 Nov 2016 6:27 AM, "Juliana Mori"  wrote:
> >
> > Hello,
> >
> > I have loaded a wms server to QGis, which is a raster format. As I need
to use this in an external aplication (CARTO) which does not support wms,
I´m trying to export the server loaded into QGIS through "save as"
funcionality. But it´s not working.
> >
> > Do you know how I can export the wms loaded to a file (raster or shp)?
> >
> > Thanks a lot, Juliana.
> >
> >
> > ps:: I´m working with QGis Essen, 2.14.3
>
> I'd strongly suggest an upgrade to 2.14.8 is in order. You're missing out
on hundreds of bug fixes.

By the way - I was just looking at your webpage... It's very nice work!!

I'm really curious how you're using QGIS with your projects. How does it
fit with your work?

Nyall

>
> Nyall
>
> >
> > --
> > Juliana Mori
> > www.julianamori.com
> >
> >
> > ___
> > Qgis-user mailing list
> > Qgis-user@lists.osgeo.org
> > List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
> > Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
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Re: [Qgis-user] downloading a wms geoservice from QGis

[Nyall Dawson]

On 8 Nov 2016 6:27 AM, "Juliana Mori"  wrote:
>
> Hello,
>
> I have loaded a wms server to QGis, which is a raster format. As I need
to use this in an external aplication (CARTO) which does not support wms,
I´m trying to export the server loaded into QGIS through "save as"
funcionality. But it´s not working.
>
> Do you know how I can export the wms loaded to a file (raster or shp)?
>
> Thanks a lot, Juliana.
>
>
> ps:: I´m working with QGis Essen, 2.14.3

I'd strongly suggest an upgrade to 2.14.8 is in order. You're missing out
on hundreds of bug fixes.

Nyall

>
> --
> Juliana Mori
> www.julianamori.com
>
>
> ___
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org
> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
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Re: [Qgis-user] downloading a wms geoservice from QGis

[Juliana Mori]

Yes, I did set a resolution as you explained:

[image: Imagem inline 1]


I could finally get a file but the resolution is too poor (all pixelized)>
I tried with none compression but still not good. I guess the horizontal
and vertical resolutions are too low, but don´t really understand the
parameter to be sure what would be a good value. Any sugestions?

2016-11-07 19:27 GMT-02:00 Andreas Neumann :

> So - have you tried setting a resolution and extent? The resolution input
> fields need to have values. Empty fields don't work. And no - QGIS can't
> autodetect it. It does not know the native resolution of WMS services.
>
> Andreas
>
> Am 07.11.2016 um 22:23 schrieb Juliana Mori:
>
> sorry, I hit enter before finishing the email... Again:
>
> Hi Andreas,
>
> for sure it would be much better to use the webservice directly but I´m
> already investigating with CARTO and it seems there´s no WMS support - if I
> have any update on this, I´ll share with you.
>
> EPSG:4326 would be perfect for me, even though I know the original file is
> in Magna Sirgas (EPSG:4686). So, if I understood right, I need to specify a
> resolution in decimal degrees, right?
>
> I´m saving a raster image with only 3 color values (assigned by its column
> "dn" which indicates if the pixels correspond to forest, no forest or no
> information). Sorry, I don´t know to say if it´s orthoimage.
> I´ve already polygonized the other tiff files I had from this series (but
> were not from WMS) and the results were meaningful, probably because
> there´re only this 3 colors.
>
>
>
> 2016-11-07 19:18 GMT-02:00 Juliana Mori :
>
>> Hi Andreas,
>>
>> for sure it would be much better to use the webservice directly but I´m
>> already investigating with CARTO and it seems there´s no WMS support - if I
>> have any update on this, I´ll share with you.
>>
>> EPSG:4326 would be perfect for me, even though I know the original file
>> is in Magna Sirgas (EPSG:4686).
>>
>>
>>
>> 2016-11-07 19:15 GMT-02:00 Andreas Neumann :
>>
>>> Hi Juliana,
>>>
>>> First, I would investigate with Carto, if you really cannot embed a WMS.
>>> It would be much better to use the webservice directly rather than
>>> downloading and uploading and then end up with an outdated image.
>>>
>>> If that does not work, you need to set a meaningful resolution. As we
>>> can see in your screenshot the resolution text input fields are empty. Also
>>> check if the projection is correct. Do you really want to save in EPSG:4326
>>> or rather in a meter based system?
>>>
>>> What kind of data are you saving? Orthoimages or maps with few colors or
>>> black and white? If it is orthoimages, I would use JPEG compression in the
>>> Geotiff, otherwise probably deflate/LZW.
>>>
>>> Then you have to find a meaningful resolution. If you really want to
>>> save in EPSG:4326, you have to specify a resolution in decimal degrees. Try
>>> with larger values first, such as 0.05 and then, if it is too coarse go to
>>> smaller values.
>>>
>>> About polygonizing raster to vector: this really depends on the content
>>> - and I kind of doubt it if you really get meaningful results. Maybe it
>>> works with few colors and homogeneous areas. It certainly would not work
>>> well for aerial images.
>>> Hope it helps,
>>> Andreas
>>>
>>> Am 07.11.2016 um 22:05 schrieb Juliana Mori:
>>>
>>> Hi Andreas,
>>>
>>> thanks for your reply.
>>>
>>> I chose layer extent for extensions and current layer for resolution but
>>> still doesn´t work.
>>>
>>>
>>>
>>>
>>> Should I do this in a different way?
>>>
>>> About the bigger question, no, CARTO doesn´t allow uploading geotiffs.
>>> What I´ve done so far is polygonizing the rasters in QGis and uploading the
>>> converted shapefile to CARTO. As you said WMS can´t be converted into
>>> shape, I´m not sure this is going to work at all... won´t I be able to
>>> polygonize a raster downloaded from a WMS server?
>>>
>>> All the best, Juliana.
>>>
>>>
>>>
>>>
>>>
>>> 2016-11-07 18:44 GMT-02:00 Andreas Neumann :
>>>
 Hi Juliana,

 "Save AS" as a WMS should work fine - but you need to specify a useful
 extent and resolution (in map units of your projection). Otherwise it
 probably fails.

 I just tested it and it works fine.

 The bigger question is: will CARTO allow to upload larger Geotiff
 files? Did you check that?

 Note that WMS are always raster. You can't convert it into a shp file.

 Andreas

 Am 07.11.2016 um 21:27 schrieb Juliana Mori:

 Hello,

 I have loaded a wms server to QGis, which is a raster format. As I need
 to use this in an external aplication (CARTO) which does not support wms,
 I´m trying to export the server loaded into QGIS through "save as"
 funcionality. But it´s not working.

 Do you know how I can export the wms loaded to a file (raster or shp)?

 Thanks a lot, Juliana.


 ps:: I´m working with QGis Essen, 2.14.3

 --
 *Juliana Mori

Re: [Qgis-user] downloading a wms geoservice from QGis

[Andreas Neumann]

So - have you tried setting a resolution and extent? The resolution 
input fields need to have values. Empty fields don't work. And no - QGIS 
can't autodetect it. It does not know the native resolution of WMS services.


Andreas


Am 07.11.2016 um 22:23 schrieb Juliana Mori:

sorry, I hit enter before finishing the email... Again:

Hi Andreas,

for sure it would be much better to use the webservice directly but 
I´m already investigating with CARTO and it seems there´s no WMS 
support - if I have any update on this, I´ll share with you.


EPSG:4326 would be perfect for me, even though I know the original 
file is in Magna Sirgas (EPSG:4686). So, if I understood right, I need 
to specify a resolution in decimal degrees, right?


I´m saving a raster image with only 3 color values (assigned by its 
column "dn" which indicates if the pixels correspond to forest, no 
forest or no information). Sorry, I don´t know to say if it´s orthoimage.
I´ve already polygonized the other tiff files I had from this series 
(but were not from WMS) and the results were meaningful, probably 
because there´re only this 3 colors.




2016-11-07 19:18 GMT-02:00 Juliana Mori >:


Hi Andreas,

for sure it would be much better to use the webservice directly
but I´m already investigating with CARTO and it seems there´s no
WMS support - if I have any update on this, I´ll share with you.

EPSG:4326 would be perfect for me, even though I know the original
file is in Magna Sirgas (EPSG:4686).



2016-11-07 19:15 GMT-02:00 Andreas Neumann mailto:a.neum...@carto.net>>:

Hi Juliana,

First, I would investigate with Carto, if you really cannot
embed a WMS. It would be much better to use the webservice
directly rather than downloading and uploading and then end up
with an outdated image.

If that does not work, you need to set a meaningful
resolution. As we can see in your screenshot the resolution
text input fields are empty. Also check if the projection is
correct. Do you really want to save in EPSG:4326 or rather in
a meter based system?

What kind of data are you saving? Orthoimages or maps with few
colors or black and white? If it is orthoimages, I would use
JPEG compression in the Geotiff, otherwise probably deflate/LZW.

Then you have to find a meaningful resolution. If you really
want to save in EPSG:4326, you have to specify a resolution in
decimal degrees. Try with larger values first, such as 0.05
and then, if it is too coarse go to smaller values.

About polygonizing raster to vector: this really depends on
the content - and I kind of doubt it if you really get
meaningful results. Maybe it works with few colors and
homogeneous areas. It certainly would not work well for aerial
images.

Hope it helps,
Andreas

Am 07.11.2016 um 22:05 schrieb Juliana Mori:

Hi Andreas,

thanks for your reply.

I chose layer extent for extensions and current layer for
resolution but still doesn´t work.



Should I do this in a different way?

About the bigger question, no, CARTO doesn´t allow uploading
geotiffs. What I´ve done so far is polygonizing the rasters
in QGis and uploading the converted shapefile to CARTO. As
you said WMS can´t be converted into shape, I´m not sure this
is going to work at all... won´t I be able to polygonize a
raster downloaded from a WMS server?

All the best, Juliana.





2016-11-07 18:44 GMT-02:00 Andreas Neumann
mailto:a.neum...@carto.net>>:

Hi Juliana,

"Save AS" as a WMS should work fine - but you need to
specify a useful extent and resolution (in map units of
your projection). Otherwise it probably fails.

I just tested it and it works fine.

The bigger question is: will CARTO allow to upload larger
Geotiff files? Did you check that?

Note that WMS are always raster. You can't convert it
into a shp file.

Andreas


Am 07.11.2016 um 21:27 schrieb Juliana Mori:

Hello,

I have loaded a wms server to QGis, which is a raster
format. As I need to use this in an external aplication
(CARTO) which does not support wms, I´m trying to export
the server loaded into QGIS through "save as"
funcionality. But it´s not working.

Do you know how I can export the wms loaded to a file
(raster or shp)?

Thanks a lot, Juliana.


ps:: I´m working with QGis Essen, 2.14.3

-- 
*Juliana Mori*

www.julianamori.com 



___

Re: [Qgis-user] downloading a wms geoservice from QGis

[Juliana Mori]

sorry, I hit enter before finishing the email... Again:

Hi Andreas,

for sure it would be much better to use the webservice directly but I´m
already investigating with CARTO and it seems there´s no WMS support - if I
have any update on this, I´ll share with you.

EPSG:4326 would be perfect for me, even though I know the original file is
in Magna Sirgas (EPSG:4686). So, if I understood right, I need to specify a
resolution in decimal degrees, right?

I´m saving a raster image with only 3 color values (assigned by its column
"dn" which indicates if the pixels correspond to forest, no forest or no
information). Sorry, I don´t know to say if it´s orthoimage.
I´ve already polygonized the other tiff files I had from this series (but
were not from WMS) and the results were meaningful, probably because
there´re only this 3 colors.



2016-11-07 19:18 GMT-02:00 Juliana Mori :

> Hi Andreas,
>
> for sure it would be much better to use the webservice directly but I´m
> already investigating with CARTO and it seems there´s no WMS support - if I
> have any update on this, I´ll share with you.
>
> EPSG:4326 would be perfect for me, even though I know the original file is
> in Magna Sirgas (EPSG:4686).
>
>
>
> 2016-11-07 19:15 GMT-02:00 Andreas Neumann :
>
>> Hi Juliana,
>>
>> First, I would investigate with Carto, if you really cannot embed a WMS.
>> It would be much better to use the webservice directly rather than
>> downloading and uploading and then end up with an outdated image.
>>
>> If that does not work, you need to set a meaningful resolution. As we can
>> see in your screenshot the resolution text input fields are empty. Also
>> check if the projection is correct. Do you really want to save in EPSG:4326
>> or rather in a meter based system?
>>
>> What kind of data are you saving? Orthoimages or maps with few colors or
>> black and white? If it is orthoimages, I would use JPEG compression in the
>> Geotiff, otherwise probably deflate/LZW.
>>
>> Then you have to find a meaningful resolution. If you really want to save
>> in EPSG:4326, you have to specify a resolution in decimal degrees. Try with
>> larger values first, such as 0.05 and then, if it is too coarse go to
>> smaller values.
>>
>> About polygonizing raster to vector: this really depends on the content -
>> and I kind of doubt it if you really get meaningful results. Maybe it works
>> with few colors and homogeneous areas. It certainly would not work well for
>> aerial images.
>> Hope it helps,
>> Andreas
>>
>> Am 07.11.2016 um 22:05 schrieb Juliana Mori:
>>
>> Hi Andreas,
>>
>> thanks for your reply.
>>
>> I chose layer extent for extensions and current layer for resolution but
>> still doesn´t work.
>>
>>
>>
>>
>> Should I do this in a different way?
>>
>> About the bigger question, no, CARTO doesn´t allow uploading geotiffs.
>> What I´ve done so far is polygonizing the rasters in QGis and uploading the
>> converted shapefile to CARTO. As you said WMS can´t be converted into
>> shape, I´m not sure this is going to work at all... won´t I be able to
>> polygonize a raster downloaded from a WMS server?
>>
>> All the best, Juliana.
>>
>>
>>
>>
>>
>> 2016-11-07 18:44 GMT-02:00 Andreas Neumann :
>>
>>> Hi Juliana,
>>>
>>> "Save AS" as a WMS should work fine - but you need to specify a useful
>>> extent and resolution (in map units of your projection). Otherwise it
>>> probably fails.
>>>
>>> I just tested it and it works fine.
>>>
>>> The bigger question is: will CARTO allow to upload larger Geotiff files?
>>> Did you check that?
>>>
>>> Note that WMS are always raster. You can't convert it into a shp file.
>>>
>>> Andreas
>>>
>>> Am 07.11.2016 um 21:27 schrieb Juliana Mori:
>>>
>>> Hello,
>>>
>>> I have loaded a wms server to QGis, which is a raster format. As I need
>>> to use this in an external aplication (CARTO) which does not support wms,
>>> I´m trying to export the server loaded into QGIS through "save as"
>>> funcionality. But it´s not working.
>>>
>>> Do you know how I can export the wms loaded to a file (raster or shp)?
>>>
>>> Thanks a lot, Juliana.
>>>
>>>
>>> ps:: I´m working with QGis Essen, 2.14.3
>>>
>>> --
>>> *Juliana Mori*
>>> www.julianamori.com
>>>
>>>
>>>
>>> ___
>>> Qgis-user mailing listqgis-u...@lists.osgeo.org
>>> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
>>> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
>>>
>>> ___ Qgis-user mailing list
>>> Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman
>>> /listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman
>>> /listinfo/qgis-user
>>
>> --
>> *Juliana Mori*
>> www.julianamori.com
>> +55 11 999653145
>>
>>
>
>
> --
> *Juliana Mori*
> www.julianamori.com
> +55 11 999653145
>
>


-- 
*Juliana Mori*
www.julianamori.com
+55 11 999653145
___
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List info: 

Re: [Qgis-user] downloading a wms geoservice from QGis

[Juliana Mori]

Hi Andreas,

for sure it would be much better to use the webservice directly but I´m
already investigating with CARTO and it seems there´s no WMS support - if I
have any update on this, I´ll share with you.

EPSG:4326 would be perfect for me, even though I know the original file is
in Magna Sirgas (EPSG:4686).



2016-11-07 19:15 GMT-02:00 Andreas Neumann :

> Hi Juliana,
>
> First, I would investigate with Carto, if you really cannot embed a WMS.
> It would be much better to use the webservice directly rather than
> downloading and uploading and then end up with an outdated image.
>
> If that does not work, you need to set a meaningful resolution. As we can
> see in your screenshot the resolution text input fields are empty. Also
> check if the projection is correct. Do you really want to save in EPSG:4326
> or rather in a meter based system?
>
> What kind of data are you saving? Orthoimages or maps with few colors or
> black and white? If it is orthoimages, I would use JPEG compression in the
> Geotiff, otherwise probably deflate/LZW.
>
> Then you have to find a meaningful resolution. If you really want to save
> in EPSG:4326, you have to specify a resolution in decimal degrees. Try with
> larger values first, such as 0.05 and then, if it is too coarse go to
> smaller values.
>
> About polygonizing raster to vector: this really depends on the content -
> and I kind of doubt it if you really get meaningful results. Maybe it works
> with few colors and homogeneous areas. It certainly would not work well for
> aerial images.
> Hope it helps,
> Andreas
>
> Am 07.11.2016 um 22:05 schrieb Juliana Mori:
>
> Hi Andreas,
>
> thanks for your reply.
>
> I chose layer extent for extensions and current layer for resolution but
> still doesn´t work.
>
>
>
>
> Should I do this in a different way?
>
> About the bigger question, no, CARTO doesn´t allow uploading geotiffs.
> What I´ve done so far is polygonizing the rasters in QGis and uploading the
> converted shapefile to CARTO. As you said WMS can´t be converted into
> shape, I´m not sure this is going to work at all... won´t I be able to
> polygonize a raster downloaded from a WMS server?
>
> All the best, Juliana.
>
>
>
>
>
> 2016-11-07 18:44 GMT-02:00 Andreas Neumann :
>
>> Hi Juliana,
>>
>> "Save AS" as a WMS should work fine - but you need to specify a useful
>> extent and resolution (in map units of your projection). Otherwise it
>> probably fails.
>>
>> I just tested it and it works fine.
>>
>> The bigger question is: will CARTO allow to upload larger Geotiff files?
>> Did you check that?
>>
>> Note that WMS are always raster. You can't convert it into a shp file.
>>
>> Andreas
>>
>> Am 07.11.2016 um 21:27 schrieb Juliana Mori:
>>
>> Hello,
>>
>> I have loaded a wms server to QGis, which is a raster format. As I need
>> to use this in an external aplication (CARTO) which does not support wms,
>> I´m trying to export the server loaded into QGIS through "save as"
>> funcionality. But it´s not working.
>>
>> Do you know how I can export the wms loaded to a file (raster or shp)?
>>
>> Thanks a lot, Juliana.
>>
>>
>> ps:: I´m working with QGis Essen, 2.14.3
>>
>> --
>> *Juliana Mori*
>> www.julianamori.com
>>
>>
>>
>> ___
>> Qgis-user mailing listqgis-u...@lists.osgeo.org
>> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
>> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
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>> /listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman
>> /listinfo/qgis-user
>
> --
> *Juliana Mori*
> www.julianamori.com
> +55 11 999653145
>
>


-- 
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www.julianamori.com
+55 11 999653145
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Re: [Qgis-user] downloading a wms geoservice from QGis

[Andreas Neumann]

Hi Juliana,

First, I would investigate with Carto, if you really cannot embed a WMS. 
It would be much better to use the webservice directly rather than 
downloading and uploading and then end up with an outdated image.


If that does not work, you need to set a meaningful resolution. As we 
can see in your screenshot the resolution text input fields are empty. 
Also check if the projection is correct. Do you really want to save in 
EPSG:4326 or rather in a meter based system?


What kind of data are you saving? Orthoimages or maps with few colors or 
black and white? If it is orthoimages, I would use JPEG compression in 
the Geotiff, otherwise probably deflate/LZW.


Then you have to find a meaningful resolution. If you really want to 
save in EPSG:4326, you have to specify a resolution in decimal degrees. 
Try with larger values first, such as 0.05 and then, if it is too coarse 
go to smaller values.


About polygonizing raster to vector: this really depends on the content 
- and I kind of doubt it if you really get meaningful results. Maybe it 
works with few colors and homogeneous areas. It certainly would not work 
well for aerial images.


Hope it helps,
Andreas

Am 07.11.2016 um 22:05 schrieb Juliana Mori:

Hi Andreas,

thanks for your reply.

I chose layer extent for extensions and current layer for resolution 
but still doesn´t work.




Should I do this in a different way?

About the bigger question, no, CARTO doesn´t allow uploading geotiffs. 
What I´ve done so far is polygonizing the rasters in QGis and 
uploading the converted shapefile to CARTO. As you said WMS can´t be 
converted into shape, I´m not sure this is going to work at all... 
won´t I be able to polygonize a raster downloaded from a WMS server?


All the best, Juliana.





2016-11-07 18:44 GMT-02:00 Andreas Neumann >:


Hi Juliana,

"Save AS" as a WMS should work fine - but you need to specify a
useful extent and resolution (in map units of your projection).
Otherwise it probably fails.

I just tested it and it works fine.

The bigger question is: will CARTO allow to upload larger Geotiff
files? Did you check that?

Note that WMS are always raster. You can't convert it into a shp file.

Andreas


Am 07.11.2016 um 21:27 schrieb Juliana Mori:

Hello,

I have loaded a wms server to QGis, which is a raster format. As
I need to use this in an external aplication (CARTO) which does
not support wms, I´m trying to export the server loaded into QGIS
through "save as" funcionality. But it´s not working.

Do you know how I can export the wms loaded to a file (raster or
shp)?

Thanks a lot, Juliana.


ps:: I´m working with QGis Essen, 2.14.3

-- 
*Juliana Mori*

www.julianamori.com 



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Re: [Qgis-user] downloading a wms geoservice from QGis

[Andreas Neumann]

Hi Juliana,

"Save AS" as a WMS should work fine - but you need to specify a useful 
extent and resolution (in map units of your projection). Otherwise it 
probably fails.


I just tested it and it works fine.

The bigger question is: will CARTO allow to upload larger Geotiff files? 
Did you check that?


Note that WMS are always raster. You can't convert it into a shp file.

Andreas


Am 07.11.2016 um 21:27 schrieb Juliana Mori:

Hello,

I have loaded a wms server to QGis, which is a raster format. As I 
need to use this in an external aplication (CARTO) which does not 
support wms, I´m trying to export the server loaded into QGIS through 
"save as" funcionality. But it´s not working.


Do you know how I can export the wms loaded to a file (raster or shp)?

Thanks a lot, Juliana.


ps:: I´m working with QGis Essen, 2.14.3

--
*Juliana Mori*
www.julianamori.com 



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