Ah.
The information is I think in the shapefile header; we do parse that shapefile
header information into the AttributeDescriptor/AttributeType information
(length as you found is captured as a filter "restriction"). I am not sure how
much detail is provided in the shapefile format about floating point precision.
Time to look at the code; and stop in a debugger and see what you can find.
--
Jody Garnett
On Friday, 27 May 2011 at 12:19 AM, Jose C. Martinez-Llario wrote:
> Hi Jody,
> Sorry I didnt explain myself in a good way.
> nono..Im not asking about how i can get a field value from a shapefile..of
> course im not going to ask that with allthe geotools documentation on the
> internet.
>
> Lets say I have a field called 'field1' and it has 20 digits of precision
> and 8 digits of scale (decimal digits).
> How can I know the precision and scale of any real shapefile field and how
> can I set up this values when I want to setup a new sschema with these fields?
>
>
> El 26/05/2011 16:12, Jody Garnett escribió:
> > Bah this silly email program sends messages when I give up and close an
> > email.
> >
> > Can I assume that scale is an attribute you are trying to access? I am
> > having a hard time answering your questions; as working with fields of
> > different types works well with GeoTools shapefile support.
> >
> > You should be calling feature.getAttribute("scale") to access a field
> > called scale; the result will be a number if that is what it is saved as.
> >
> > Examples of working with feature content here:
> > - http://docs.geotools.org/latest/userguide/library/main/feature.html
> >
> >
> > --
> > Jody Garnett
> >
> >
> > On Friday, 27 May 2011 at 12:09 AM, Jody Garnett wrote:
> >
> > > Can I assume
> > >
> > > --
> > > Jody Garnett
> > >
> > >
> > > On Thursday, 26 May 2011 at 11:40 PM, Jose C. Martinez-Llario wrote:
> > >
> > > > Dear GeoTools users,
> > > >
> > > > I am trying to read a shape file using geotools and everything is
> > > > working well.
> > > > I couldnt find out how to read the scale from a real field though.
> > > >
> > > > For reading the precision I get the field restricctions and then I
> > > > parsed each element on the list (filter.toString()) looking for the
> > > > string 'length'.
> > > > It is working for getting the length which makes me understand the
> > > > precision but I coudlnt find out how to get the scale.
> > > >
> > > > Im sure this is not the right procedure even for getting the lenght.
> > > >
> > > > I can not find out the opposite problem either. I mean how to write a
> > > > shape file and specify the precision and scale for a real shape file
> > > > field.
> > > >
> > > > So I would like to know:
> > > > 1) How I can get the precision and scale from an existing shape file
> > > > field.
> > > > 2) How I can set up the precision and scale when Im writing a new
> > > > shape
> > > > file.
> > > >
> > > > Any help will be very appreciated.
> > > >
> > > > Cheers,
> > > > Jose
> > > >
> > > > --
> > > >
> > > > ------------------------------
> > > > José Carlos Martínez Llario
> > > >
> > > > Producción Cartográfica y SIG
> > > > Dpto. Ingeniería Cartográfica, Geodesia y Fotogrametría
> > > > Universidad Politécnica de Valencia
> > > >
> > > > E-mail: [email protected] (mailto:[email protected])
> > > > Telf: 963877007 ext. 75599
> > > > ------------------------------
> > > >
> > > >
> > > >
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> > >
> >
>
>
> -- ------------------------------ José Carlos Martínez Llario Producción
> Cartográfica y SIG Dpto. Ingeniería Cartográfica, Geodesia y Fotogrametría
> Universidad Politécnica de Valencia E-mail: [email protected]
> (mailto:[email protected]) Telf: 963877007 ext. 75599
> ------------------------------
> ------------------------------------------------------------------------------
> vRanger cuts backup time in half-while increasing security.
> With the market-leading solution for virtual backup and recovery,
> you get blazing-fast, flexible, and affordable data protection.
> Download your free trial now.
> http://p.sf.net/sfu/quest-d2dcopy1
> _______________________________________________
> Geotools-gt2-users mailing list
> [email protected]
> (mailto:[email protected])
> https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
------------------------------------------------------------------------------
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With the market-leading solution for virtual backup and recovery,
you get blazing-fast, flexible, and affordable data protection.
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