[Qgis-user] Difference in Area/Perimeter calculations

[G. Allegri]

Hi Harish,
how did you calculate the area/perimeter values?
Could you provide us an excerpt of your data to test it?

giovanni

2012/7/10 Harish <harry.om2000 at gmail.com>

> Yes, when ellipsoid is same, why there is a difference.
>
> Regards
>
> On Tue, Jul 10, 2012 at 10:57 AM, Alister Hood <Alister.Hood at synergine.com
> > wrote:
>
>> Hi Harish,
>> It's a little unclear - are you asking for an explanation of why there is
>> a difference?
>>
>> Regards,
>> Alister
>>
>> > Date: Mon, 9 Jul 2012 13:03:05 +0530
>> > From: Harish <harry.om2000 at gmail.com>
>> > To: Qgis-user at lists.osgeo.org
>> > Subject: [Qgis-user] Difference in Area/Perimeter calculations
>> > Message-ID:
>> >         <CAKCjEX8-H++RBnVFF5trsKMv=
>> LdqOo43bbiVAPOD6jOX2nbmmA at mail.gmail.com>
>> > Content-Type: text/plain; charset="iso-8859-1"
>> >
>> > There is difference between area/perimeter calculations with ellipsoid
>> and
>> > project CRS. Attached is a screenshot in which first area and perimeter
>> > columns are generated with tool 'Export/Add geometry columns' using
>> > 'Ellipsoid' and second area and perimeter with using 'Project CRS' (used
>> > 32643: UTM zone 43 North/WGS1984).
>> >
>> > Ellipsoid/Spheroid used in both cases is WGS84.
>> >
>> > QGIS1.8, Windows7.
>> >
>> > Regards
>> >
>> >
>> > --
>> > Harish Kumar Solanki, Assistant Professor
>> > National Institute of Rural Development (NIRD),
>> > Ministry of Rural Development, Government of India
>> > Jaipur, Rajasthan, India- Pin-302006
>>
>
>
>
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