[Qgis-user] Getting lon/lat

[g.corral]

Sorry...





start point: $x_at(0) and $y_at(0) 





end point: $x_at(-1) and $x_at(-1)





But Jack Andersen's idea is more effective.








 Cordialement,
  

 Guayente CORRAL BROTO

   Hydrogéologue / EurGeol n°1336 






 


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-----Original Message-----
From: Jack Andersen <jack.andersen9 at gmail.com>
To: phi73 at gmx.de
Cc: QGIS User List <qgis-user at lists.osgeo.org>
Date: Mon, 27 Mar 2017 09:30:20 +0200
Subject: Re: [Qgis-user] Getting lon/lat


Hi phi73,
You can get the Lat long for start and endpoints by using the field 
calculator in the attribute table.

create a new field and calculate it with the following:

i.g. field "longXstart"  calculate: x(start_point($geometry))


"latYstart" calculate: y(start_point($geometry))




You can do the same for the endpoint by changing start_point with end_point

Furthermore the output will be in the same projection/coordinates as your 
layer, but you can do a transform command on the above command with:

x(transform(start_point( $geometry), 'EPSG:25832', 'EPSG:4326')) where the 
first epsg code is the current projection and the second one is the target 
projection

I have moved the x to the front of the command because the transform 
function only works on coodinate sets and i therefore transform x and y and 
then extract x.




_Jack Andersen




On Mon, Mar 27, 2017 at 8:17 AM, <phi73 at gmx.de> wrote:


Hello



i have map based on vector data and in it some street elements.

I would like to pick up a line segment and get the lon/lat for 

the start vertex and end vertex. 

How could it be done the easiest way in QGIS.




thanks




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