[Qgis-user] Calculating acreage in 2.2

[James Wood]

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: rjhale at northrivergeographic.com
> To: qgis-user at lists.osgeo.org; qgis-developer at lists.osgeo.org
> 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 rjhale at northrivergeographic.com
> twitter:rjhale
> http://about.me/rjhale
> 
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