[Qgis-user] Linear referencing in QGIS

Neumann, Andreas a.neumann at carto.net
Wed Sep 7 07:51:21 PDT 2016


Hi, 

Yes, I know about LR expressions in the current master versions. 

So one could visualize the events table through a virtual geometry
column - would that work? 

I will forward all this information to my friend. 

Greetings, 

Andreas 

On 2016-09-07 15:34, Matthias Kuhn wrote:

> Hi Andreas,
> 
> In QGIS 2.18 / QGIS 3.0 this should be possible via expressions:
> 
> https://github.com/qgis/QGIS/commit/e110ba7d54b0ac7d3f63e8ed7eaebb2845f9f38c
> 
> Best regards
> Matthias
> 
> On 09/07/2016 02:24 PM, Neumann, Andreas wrote: 
> 
>> Hi,
>> 
>> A friend of mine asked me if QGIS can do linear referencing - e.g.
>> symbolizing road data speed limits along a road, lets say from km 0 to
>> 0.76 there is a limit of 50 km/h, from 0.76 to 1.23 there is 80 km/h
>> limit, etc.
>> 
>> The idea is to symbolize these road segments without having to actually
>> split the data into bits. And hopefully without having to generate
>> derived tables that have no link to the original data.
>> 
>> Is QGIS able to do this, perhaps with a plugin?
>> 
>> Thanks for any hints,
>> 
>> Andreas
>> 
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