[Qgis-user] Qgis-user Digest, Vol 102, Issue 35

[Laura O'Grady]

Hi Andre,

I was trying many different configurations as well as creating different
screen dumps. 

It was because the coordinates in the "Download OpenStreetMap data" bbox
were so far off from what I knew to be accurate for Toronto I had attempted
that step with the "From Layer" checked off thinking it might grab the
shaded boundary portion of Toronto that appeared on my screen at the time. I
uploaded a screen dump that was not precisely what I was referring to by
accident.

Here's a screen dump that shows that step as I tried it before and how far
the coordinates are off base as you've noted:

https://www.dropbox.com/s/l06wdvul8w0atmh/Screenshot%202014-08-20%2015.57.04
.png

and when I try to download it fails because coordinates are incorrect:

https://www.dropbox.com/s/66rm7w54qyjqvls/Screenshot%202014-08-20%2016.02.46
.png

Also as you've mentioned I cannot manually change the coordinates even if I
know the correct ones before I d/l the section of OSM I need.

I'm in the process of uninstalling 2.4 and reinstalling 2.2 based on some
instruction I've received from a message I posted on Stack Exchange. I am
aware that my plug-ins won't downgrade. I don't want them to as they were
working fine in 2.2.

Thanks for all your efforts.

Laura

Second try, after reworking your steps on Windows 7 and QGIS 2.4 32-bit:

Am 19.08.2014 19:46, schrieb Laura O'Grady:

>
> When I was using OSM/Open Layers before in QGIS 2.2 I used the 
> tutorial posted here:
http://www.qgistutorials.com/en/docs/downloading_osm_data.html.
>

What is written there is almost current.

>
>
> When I attempted to re-create this process in 2.4 using the 
> instructions posted here by John I was able to load Open Street Map as 
> the basemap I could not download the data. I tried loading it from the 
> canvas (link to screen dump with error):
>
>
>
> https://dl.dropboxusercontent.com/u/10032664/error%20map%20canvas.png
>
>
>
> and loading it from the map layer (link to screen dump with error):
>
>
>
> https://dl.dropboxusercontent.com/u/10032664/error%20from%20layer.png
>
>
>
> If you look in the bottom left corner of the "Download Open Street Data"
> dialogue boxes in both screen dumps you will see that they have "0.0 MB"
> already hard coded. I could not remove or adjust this number. I didn't 
> attempt the manual entry because this same issue regarding the 0.0 MB 
> appeared again with this option checked off. As I can't get the data 
> downloaded I cannot move forward with downloading the tags I'm 
> interested in.

Normally, you download the map extent, and the bbox coordinates are
automatically reprojected to WGS84. For Toronto, it should be around:
West: -79.7523
North: 43.8554
East: -79.0002
south: 43.5806
Looking at your second error image, I see "Extent from Layer" for the OSM
background checked, and West set to -180. That means you want the whole
world! The overpass API rejects such requests, because it would need some GB
of traffic. QGIS would not be able to handle that anyway. 
The MB reported is read-only, you can not enter anything there. I got
291 MB for Toronto.


By the way, you can downgrade to QGIS 2.2, but you can not downgrade the
plugins.

HTH,
Andr? Joost



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End of Qgis-user Digest, Vol 102, Issue 35
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