[Qgis-user] qgis vs grass

[Jake Maier]

Great, thanks Alister, will do  
Jake

-----Original Message-----
From: Alister Hood [mailto:Alister.Hood at synergine.com] 
Sent: Saturday, March 10, 2012 8:42 PM
To: qgis-user at lists.osgeo.org
Cc: nsicad at gmail.com; j.m at jmforestry.com
Subject: Re: [Qgis-user] qgis vs grass

> Date: Sun, 11 Mar 2012 10:59:07 +1100
> From: Noli Sicad <nsicad at gmail.com>
> Subject: Re: [Qgis-user] qgis vs grass
> To: Jake Maier <j.m at jmforestry.com>
> Cc: qgis-user at lists.osgeo.org
> Message-ID:
> 	<CADs9uc-3DKdLUaUeZc2dfkqFzeR=My+6bS1_dCBX1fSVuA71Mg at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> To calculate area - (shapeflie file) in QGIS,
> 
> Have a look on the Vector (menu)->Geometry Tools -> Export / Add 
> geometry columns.
> 
> You will get a new shapefile with area and perimetre columns
> 
> Simple hack for acres;
> 
> Open dbf file of that shapefiles in LibreOffice / OpenOffice add a new 
> columns for arces and just just conversion from units to acres.
> 
> I think you can add column as well in the attributes table and add the 
> formula for conversion tor default unit to acres.

Yes, it is best to use the attribute table instead of messing around with
Openoffice.
And at least in QGIS master you can skip the "Export / Add geometry" step -
just open the attribute table and you can use the field calculator to
calculate the area and convert it into acres in one step.