QGIS would be to make it
>> to use GeographicLib as well. I have no idea if it is a realistic approach
>> and worth making a feature request.
>>
>>
>>
>> -Jukka Rahkonen-
>>
>>
>>
>> *Lähettäjä:* Nicolas Cadieux
>>
>> *Lä
wrong?
>
> -Jukka Rahkonen-
>
> -Alkuperäinen viesti-----
> Lähettäjä: Nyall Dawson
> Lähetetty: tiistai 5. tammikuuta 2021 23.46
> Vastaanottaja: Rahkonen Jukka (MML)
> Kopio: Nicolas Cadieux ;
> qgis-user@lists.osgeo.org
> Aihe: Re: [Qgis-user] Confusio
ipsoids to be used as true values?
>
>
>
> -Jukka Rahkonen-
>
>
>
>
>
>
>
> Lähettäjä: Nicolas Cadieux
> Lähetetty: tiistai 5. tammikuuta 2021 22.52
> Vastaanottaja: Rahkonen Jukka (MML) ;
> qgis-user@lists.osgeo.org
> Aihe: Re: [Qgis-user] Confusion w
: Rahkonen Jukka (MML) ;
qgis-user@lists.osgeo.org
Aihe: Re: [Qgis-user] Confusion with ellipsoidal method of $area
Hi,
QGIS is currently built on Proj version 6.3.2-1. If the other libraries are
using a spheroid by default, then they use a sphere for speed and not an
ellipsoid for precision
l. I have no idea if it is a realistic
approach and worth making a feature request.
-Jukka Rahkonen-
*Lähettäjä:*Nicolas Cadieux
*Lähetetty:* tiistai 5. tammikuuta 2021 20.04
*Vastaanottaja:* Rahkonen Jukka (MML)
; qgis-user@lists.osgeo.org
*Aihe:* Re: [Qgis-user] Confusion with ellipsoidal method
mmikuuta 2021 20.04
Vastaanottaja: Rahkonen Jukka (MML) ;
qgis-user@lists.osgeo.org
Aihe: Re: [Qgis-user] Confusion with ellipsoidal method of $area
Hi,
Your method in QGIS is sound. Area is calculated using the wgs84 ellipsoid
EPSG 7030. If you reproject to wgs84 zone 35N (I thin
Hi,
Your method in QGIS is sound. Area is calculated using the wgs84
ellipsoid EPSG 7030. If you reproject to wgs84 zone 35N (I think this is
close), area goes from 249566957499.7546m2 to 249566957499.721m2 or a
difference of 0.0336 m2. I don't think densification would change
things
Hi,
I wonder what method QGIS is using when it computes ellipsoidal area with $area
function. I made a test with this EPSG:4326 polygon:
POLYGON (( 20.13293641 59.95688345, 26.94617837 60.47397663, 29.74782155
62.56499443, 27.45254202 68.7065034, 23.75771765 68.24937206, 25.42698984
