[Gvsig_english] computing X,Y coordinates

[Benjamin Ducke]

It should also be able to "misuse" an annotation layer for that purpose.
You should be able to create an annotation layer from your polygon file.
This will be a simple points file with a centroid for each polygon where
the annotation is supposed to go. Simply load that new layer back into
your project as a regular Shapefile, then use the field calculator
to get the X/Y coordinates.

Ben

Sergio Clark wrote:
> Hi Nik,
> 
> It's possible to get X and Y coordinates of a shape, if it is type 
> point. You can do this by using the Field Calculator in gvSIG. First, 
> 'start editing' your shp, then open its table and add numeric fields for 
> X and Y values. With this field selected in the table click 'Field 
> calculator' and use functions 'x' and 'y' to get these values.
> 
> But if you mean getting the X,Y coordinates of a centroid (for a polygon 
> shape), you should write a jython script and then use the 'Advanced' 
> label of the Field Calculator in order to load and use it (I don't know 
> the exact code for this script now).
> 
> 
> Hope it helps,
> Regards
> 
> Sergio.
> 
> 
> 
> 
> Nik Go escribió:
>> Hi everyone.
>>
>> I'm trying to find out if I can retrieve the X,Y coordinates of my 
>> shape features (perhaps, it's center?)  Arcview can do something like 
>> this: HowTo:  Calculate Latitude and Longitude values using the Field 
>> Calculator 
>> <http://support.esri.com/index.cfm?fa=knowledgebase.techarticles.articleShow&d=31863>. 
>>
>>
>> Is it possible to do something similar in gvSIG? I've been trying to 
>> twist my head on this problem for a few days now.
>>
>> I'm running gvSIG 1.1 and 1.9a on Ubuntu 8.10.
>> ------------------------------------------------------------------------
>>
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>>   
> 
> 


-- 
Benjamin Ducke
Senior Applications Support and Development Officer

Oxford Archaeology Ltd
Janus House
Osney Mead
OX2 0ES
Oxford, U.K.

Tel: +44 (0)1865 263 800 (switchboard)
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benjamin.ducke at oxfordarch.co.uk




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