[Gvsig_english] Calculating areas in the atribute table.

[Wolfgang Qual]

Hello Antonio,
yes, gvSIG rocks! And it is good to see that more and more people get interested in this program. Well, I'll try to answer your questions:

regarding A)
as far as I know, gvsig-developers are very busy with enhancing options for labeling and symbols (legend). Hopefully,it will not take too long to see these features in a new version (All the best, Jaume!)

regarding B)
recent versions of gvSIG (at least 1.1) provide a "field calculator". To be able to use it, you will have to follow these steps:

1) make the desired theme active, right-click - start editing
2) open the attribute table of that theme, click on the attribute column for which you would like to calculate area, perimeter --> on the menu bar, there will appear a new symbol which looks like a calculator.
3) This field calculator allows you to use differrent calculations, among others also area and perimeter. It's very similar to ArcView 3.2.
I also would like to mention that there is no automatical update of items like area and perimeter. This would really make sense. Developers?

regarding C)
I fear that I do not the status of this feature. I agree that this would be nice to have.

Cheers,
Wolfgang


-------- Original-Nachricht --------
> Datum: Thu, 24 Jan 2008 14:28:15 -0000
> Von: "Antonio Gennarini" <AntonioGennarini at esinternational.com>
> An: gvsig_internacional at runas.cap.gva.es
> Betreff: [Gvsig_english] Calculating areas in the atribute table.

> Hi.
> 
> First of all I'd like to express my compliments to all those who are
> participating to this project as I think that it's gret to have such a
> comprehensive open source tool for GIS purposes. We are thinking of
> implementing the use of this software within our company but need to
> fully assess it's capabilities in order to make a correct judgement. 
> 
> I have several questions I need to ask hoping that someone of you will
> find the time and patience to answer:
> 
> A) I find the formatting of legends and labels in gvSIG a bit more
> complex than in ArcGIS. Any programs to enhance these features in the
> future?
> B) One thing that I ind useful is creating fields in the attribute table
> of polygon shapefiles and autoatically populating the columns with
> areas, coordinates, perimeters, etc. Is there some sort of calculator
> for the attribute table? The area calculator button is useful but not
> for this kind of operation.
> C) ArcGIS is good a putting grids on maps and the formatting of these
> grids is relatively simple and powerful. I have not found a way to stick
> the coordiante labels in the grids.
> 
> Many thanks
> 
> 
> Antonio Gennarini
> Project Consultant
> -------------------------------------
> ESI Ltd
> Soil and Groundwater Specialists
> New Zealand House
> 160, Abbey Foregate
> Shrewsbury SY2 6FD
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