Ha!!
I'm not sure exactly what is going on. I just set out another email and
I can't get this one data layer I've created to calculate correctly. I
chalked up the one yesterday to fat fingering the acreage. Today - I've
done this quite a bit it's consistently wrong. Linux - it's right. I'm
going to reboot. Go for a walk. Come back and try again.
I'm going to do a series of tests to reinforce it's me - I've done some
things but I haven't been consistent between platforms.
This cat isn't sneaky but sleeps on my desk....
Randy
-----------------
Randal Hale, GISP
North River Geographic Systems, Inc
http://www.northrivergeographic.com
423.653.3611 [email protected]
twitter:rjhale
http://about.me/rjhale
On 02/27/2014 01:49 PM, James Wood wrote:
Hey Randy,
I don't know about your bug, but having sat through some of your TNGIC
presentations, I can verify that you are, in fact, crazy...
I've got a parcel base that's in EPSG:2274 and when I calc a
comparable field (decimal; width:20; precision:5) using $area/43560, I
get a value that is the same as in the calc_acre field for that
same parcel (values inserted by the assessor), so it looks like it's
working for me. I'm running v2.2 x64 installed with OSGeo4W on Windows
7 SP1.
FYI, cats can be pretty sneaky...
James
> Date: Thu, 27 Feb 2014 12:00:29 -0500
> From: [email protected]
> To: [email protected]; [email protected]
> Subject: [Qgis-user] Calculating acreage in 2.2
>
> I think I may have found a bug....or I'm just slightly confused.
>
> I'm working on a client job (digitizing forestry stands) and I need to
> calculate acres of the final area. The data I'm working with is in
> EPSG:2274. So I create a field that is decimal (width 20, precision 5)
> and in the field calculator I use $area/43560 - (there are 43560 square
> feet in an acre). My result is one decimal off - instead of 195.30
acres
> I have 19.53 Acres. I've done this enough to where I'm questioning
every
> button push. If I divide by 4356 I get the correct number. I'm
currently
> doing this in Windows 7 OSGEO install QGIS 2.2.
>
> Anyway - can someone tell me I'm crazy...or not crazy. Projections are
> set correctly...cat has remained off the keyboard etc.
>
> Randy
>
> --
> -----------------
> Randal Hale, GISP
> North River Geographic Systems, Inc
> http://www.northrivergeographic.com
> 423.653.3611 [email protected]
> twitter:rjhale
> http://about.me/rjhale
>
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