[Qgis-user] Mesaure tool Problem

[Martin Baloga]

Hi, Bernard,

No, in desktop I have 900913 the project CRS, when I measure any feature,
the result is 90 m. (The same as in ArcMap with S-JTSK CRS). When I open the
project with CRS set to 900913, I got 130 m.  for the same feature. When I
open the WMS in ArcMap or any other GIS viewer I got again 90 m in 900913. 

The same, with the same values, happens when using 4326.

Simply in QWC for some reason the measure is different. I would realy
appreciate if the measures are correct. I am prepraring QWC for a
municipality and the difference between parcel area in attribute and measure
tool is quite confusing...

S pozdravom / Best regards / Salutanta
Ing. Arch. Martin Baloga, PhD.
www.jazzarchitecture.sk
+421 903 314 492


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-----Original Message-----
From: Bernhard Ströbl [mailto:bernhard.stroebl at jena.de] 
Sent: Thursday, September 19, 2013 11:28 AM
To: qgis-user at lists.osgeo.org
Cc: Martin Baloga
Subject: Re: Mesaure tool Problem

hi,

so if you measure in QGIS desktop with project CRS set to 4326 you measure
90m and in QWC with CRS 4326 you measure 130m for the same feature?
If I open a 4326-project in desktop my measure results are output in degrees
(can I change that somehow?), so I cannot compare to the QWC output of the
same project which is in metres. If you use a different projection in
desktop then your measurements may - of course - be different.
Measurement in QWC is handled using the OpenLayers' measure control [1]

Bernhard

[1]
http://dev.openlayers.org/releases/OpenLayers-2.13.1/doc/apidocs/files/OpenL
ayers/Control/Measure-js.html

Am 19.09.2013 10:50, schrieb Martin Baloga:
> Dear Bernard,
>
> e.g. by meauring length of cca 90 m in QGIS, the length measured in 
> web client is approx. 130 m. The size of the are is approx. Twice the 
> size. I guess maybe the units there are somewhere not properly set. 
> But in options.js and webinit.js are only m.
>
> If you are interrested, i can send you wms link and address of the 
> webclient. Thanx.
>
>
> S pozdravom / Best regards / Salutanta Ing. Arch. Martin Baloga, PhD.
>
> Pred vytlačením tohto e-mailu myslite na životné prostredie.
> Please consider your environmental responsibility before printing this 
> e-mail.
> Mi petas vin pripensu pri via respondeco por la cxirkauxajxo antauxe 
> elpreso de tiu-cxi mesagxo.
>
>
>
>
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