[Qgis-user] qgis vs grass

[Noli Sicad]

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.

Re: aerial photos, you can use georeference plugin (C++ plugin -
standard /default installed by QGIS to georeference those photos. It
easy and simple to do georeferencing in QGIS compare to MapInfo and
ArcMap.

Noli


On 3/11/12, Jake Maier <j.m at jmforestry.com> wrote:
> Thanks Noli,
> That was exactly the advice I was hoping for.
> I write forest management plan, and work with some biologists on Natural
> Resources Inventories. I provide the mapping with a bit forestry consulting
> as a sideline.
> So I want to show drainage maps  or vegetation maps (airphotos or topomaps
> overlain with different shaded polygons).
> One important future goal is to show particular stands depending on
> information in the database. I also was hoping grass may provide better ways
> to calculate area. I need English system, acres. I think that is not
> provided in QGIS.
>
> Jake
>
> -----Original Message-----
> From: Noli Sicad [mailto:nsicad at gmail.com]
> Sent: Saturday, March 10, 2012 6:06 PM
> To: Jake Maier
> Cc: qgis-user at lists.osgeo.org
> Subject: Re: [Qgis-user] qgis vs grass
>
> Hi Jake,
>
> If you are just new to QGIS, just use QGIS without Grass plug-in first.
> Familiarize yourself with QGIS. Download and read QGIS manual.
> You can always install the Grass plug-in later.
>
> If you used ArcMap before and  not ArcInfo, mostly like to you don't need
> Grass at the moment. Most of QGIS users (including me) have a little use of
> Grass until you want advance Geoprocessing which can not do in QGIS.
>
> BTW, sort of things you want to use QGIS for forestry application.
>
> ( BTW,I am trying to use QGIS for forest management and Spatial forest
> estate modelling.)
>
> Noli
>
> On 3/11/12, Jake Maier <j.m at jmforestry.com> wrote:
>> I'm new to qgis. I used ArcMap before so I have some GIS experience.
>> I have the grass plug-in installed. Should I try to setup the grass
>> database right away and try to do everything within grass or should I
>> first use just qgis without Grass until I get more familiar with it.
>>
>> Any pointers are very welcome.
>>
>> Thanks in advance
>>
>> Jake
>>
>>
>>
>>
>>
>>
>
>