Re: [Geotools-gt2-users] slightly customize default crs

[Jody G. <jod...@gm...>]

Not sure I understand; take your defaultCRS constructed below and print it out as WKT to see the WKT representation. At least that will show us how to do it :-)

As for hooking it up; as long as you have made the CoordianteReferenceSystem data structure it is hooked up; you should be able to transform to any other CoordinateReferenceSystem that geotools supports.

Note that the EPSG codes and WGS84 are nothing magic; GeoTools supports the data structure; and the EPSG codes are just an easy way to fill in the correct data structure.

-- 
Jody Garnett

On Monday, 21 February 2011 at 1:53 AM, Oleksandr Huziy wrote: 
> Hello,
> 
> thanks for your reply.
> 
> I don't think that extent can be specified in wkt, at least I did not find a way to do it.
> I managed to specify the extent like below:
> 
>  public static CoordinateReferenceSystem getDefaultCRS() throws FactoryException{
> 
>  if (defaultCRS != null){
>  return defaultCRS;
>  }
> 
>  Map<String,Object> properties = new HashMap<String,Object>(4);
>  properties.put(NAME_KEY, "WGS84(DD)(0..360,-90..90)"); 
> 
> 
>  ExtentImpl extent = new ExtentImpl();
>  Collection<GeographicExtent> col = new ArrayList<GeographicExtent>();
>  col.add(new GeographicBoundingBoxImpl(0,360, -90, 90));
>  extent.setGeographicElements(col);
>  properties.put(DOMAIN_OF_VALIDITY_KEY, extent);
>  defaultCRS = new DefaultGeographicCRS(properties, DefaultGeodeticDatum.WGS84,
>  DefaultEllipsoidalCS.GEODETIC_2D);
> 
> 
>  return defaultCRS;
>  }
> 
> 
>  public static void main(String[] args) throws IOException, FactoryException {
>  System.out.println(DefaultGeographicCRS.WGS84.getDomainOfValidity());
>  System.out.println(DefaultGeographicCRS.WGS84.toWKT());
>  System.out.println(getDefaultCRS().getDomainOfValidity());
>  }
> 
> 
> But now how to connect this crs with WGS84 and other default coordinates, in order to seamlessly use JTS.transform() ?
> 
> thank you
> --
> Oleksandr
> 
> 
> 2011/2/20 Jody Garnett <jod...@gm...>
> > The easy way is to parse from well known text. 
> > 
> > See:
> > - http://docs.codehaus.org/display/GEOTDOC/01+CRS+Helper+Class
> > 
> > -- 
> > Jody Garnett
> > 
> > On Sunday, 20 February 2011 at 2:26 PM, Oleksandr Huziy wrote: 
> > > Hello,
> > > 
> > > Is there an easy way to get from DefaultGeograficCRS.WGS84 an object with the same datum, but for which longitude changes from 0 to 360?
> > > 
> > > I want it because I have polygons intersecting 180 degrees. 
> > >  So the points on the different size of 180 meridian are connected using the longer arc  from for example -179 to 179 giving dlon=358 degrees, but I want dlon=2 degrees.
> > > 
> > > Or maybe it is possible to change the prime meridian?
> > >  I looked at the examples at codehaus, but they are not up-to-date, since the factories used there does not exist anymore.
> > > 
> > > thank you for any help.
> > > 
> > > --
> > > Oleksandr Huziy
> > > ------------------------------------------------------------------------------
> > > The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE:
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> > >  Find and fix more than 250 security defects in the development cycle.
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> > > http://p.sf.net/sfu/intel-dev2devfeb
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> > > 
> > 
>