Hi Michel,
Never use epsg 3857 for measurement beacuse it is not a "projection"...
this "pseudo projection mercator" 3857, called often "Popular Visualisation "
is pseudo Because only use for visualization applications.
example in France : 3200 km for a road for example, instead of 2100 k
Thank you very much for the explanation.
When I use
length(transform($geometry,layer_property(@layer_id,'crs'),'EPSG:31370')) in
Belgium the results are very similar to the result of the Measure Tool, but if
use this expression in New York the result is different from the result of the
Measure
Hi Carlos:
I georeferenced 2 screen shots of your maps and obtained good results.
I would have a close look at the coordinates of your ground control
points and make sure you selected the utm grid intersection as a control
point versus the corner of the mapsheet which is a lat/long grid. It i
a full Technical description of code 3857 epsg (and his trouble about
measurement) here :
https://alastaira.wordpress.com/2011/01/23/the-google-maps-bing-maps-spherical-mercator-projection/
so long...
Julien-Pierre GUILLOUX
Chargé de mission Eau, Forêt, Natura 200
Maybe I misunderstood your question, but you *should* expect
different length, area and direction calculations when converting
from one projection to another. Every projection distorts. Either
distance, area, or direction, or some combination. A local
projection is design
Denar qgis community, i use the same version of qgis in portable and laptop
comp. with diffent sistema - portable is 32 bits, laptop 64. Accidenty i used
project file prepared by 32 bit system and saved it. Now it is unpossible to
open it in portable computer. Please, any idea how to solve the
Is there a setting that controls whether features when selected by expression
against attribute values, show as highlighted (yellow) or not? I am sure this
worked in the past, but no longer does so on my install (2.18). The features
when selected by mouse show as yellow on map and selected in at
> Le 18 mai 2018 à 00:28, a écrit :
>
> I haven't been able to open the dataset but going through the discussion I
> would like to offer some assistance since I believe there are some
> misconceptions here:
>
> First, the data has nothing to do with the NAD27 / NAD83 datum's since these
>
Hi,
NAD27 does touch the northern part of South America but you are correct
in saying that it does not extend in Brazil. I wrote the comments when
I was still trying to figure out where the maps were in the world. I
often get problems with NAD27 vs NAD83 grid in Canada as many maps have
bee
Greetings,
I made a script to automate some gis tasks using qgis. I tested the script
in the python window in qgis3.0 and I can import it and use it properly.
The issue is that I'm having trouble using it outside of qgis I can't seem
to get python3 to work properly. For the python3.exe in app/pyt
Run py3_env in your osgeo4w shell
https://gis.stackexchange.com/a/277842/2856
Luke
On Sat., 19 May 2018, 06:55 Alexis R.L., wrote:
> Greetings,
>
> I made a script to automate some gis tasks using qgis. I tested the script
> in the python window in qgis3.0 and I can import it and use it properl
I am trying to register to report a bug in v3 but although I have registered
on the QGIS Issue Tracking Page, I continually fail to get a conformation
email. Any thoughts on why or who I need to contact?
Grant Boxer
Perth, Western Australia
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