[Qgis-user] summing line lengths

[Neumann, Andreas]

Hi Reginald, 

What QGIS version are you working on? If you have version 2.10 or
higher, this is very simple to solve with the "Statistics panel". 

Got to menu "View" --> "Panels" --> "Statistics panel". 

In the panel select the layer --> press the "Expression button"
(Epsilon) and type "$length". Then you should see als sort of statistics
parameters on $length, including the sum. 

--------------------- 

Starting from QGIS 2.16, the aggregate functions are also available in
the expressions - so you could have a dynamic sum of $length in your
print composer. 

Hope this helps, 

Andreas 

On 2016-06-22 11:13, Reginald Carlier wrote:

> Hello, 
> 
> I'm want to sum up the length of all the streets in my community. 
> 
> I have a vector file with the streetmiddlelines. 
> 
> Under Vector there are the analysis tools and one of them is called "Lijnlengtes sommeren". It seems that this would be the right tool. When I open up the dialog and fill in the output file and select the streetmiddlelines, the tool complains that I haven't selected a vectorlayer as output. There is another dropbox where you can select a polygon vector layer (Why would you do that if you want to sum up lines?). If I select a polygon layer then the tool keeps running indefinitely. Seems that this is a useless tool, or am I doing something wrong? 
> 
> Reginald 
> 
> Reginald Carlier
> Deskundige GIS 
> 
> Gemeente Ingelmunster, Oostrozebekestraat 4, 8770 Ingelmunster 
> T +32 51 33 74 39 www.ingelmunster.be [1] 
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