Martin Desruisseaux ha scritto: > Le jeudi 18 janvier 2007 à 17:13 +0100, Andrea Aime a écrit : ...
> As a side note, you can also use CRS.equalsIgnoreMetadata(...). This > just a convenient way to invoke AbstractIdentifiedObject.equals(xxx, > false). Ah, cool :-) > But you are right, the axis name are relevant. Those names are > constrained by ISO 19111 specification, table 16 at page 22. According > ISO 19111, those axis names must be "Geodetic longitude" and "Geodetic > latitude". The WKT is in violation with this standard, since WKT > specification in OGC 01-009 said that default axis name should be "Lon" > and "Lat". > > So we have a conflict between two standards. Current Geotools code > doesn't try to solve this conflict. But we could add some code in > DefaultCoordinateSystemAxis.equals(...) saying that "Lon" is equivalent > to "Geodetic longitude". Yeah, I agree. I'll try it on my comparison and see what comes out. >> I would like a more lenient way to do the comparison, that uses >> only the spheroid parameters, the projection parameters, primem, and >> unit. Is there any way to get it? > > Current code doesn't do that. We could try to generalize > AbstractIdentifiedObject.equals(..., boolean) method, for example trying > to replace the boolean argument by some Enum object, so we have room for > a variety of comparaison methods. However I'm not sure that we can > compare units if we don't check axis name (how can we know if we are > comparing the units of the same axis?). Futhermore, we may also need a > way to specify a tolerance level in floating point comparaisons. > > We may try to first add the special check for "Lon" and "Lat" axis names > since they come from legacy OGC 01-009 specification and see if it > resolve a majority of cases. If it doesn't work well enough, then we > could consider the more complex AbstractIdentifiedObject.equals(..., > SomeEnum) approach. What do you think? I like doing things stepwise, yes, so lets try this one first. I'll let you know how it goes, if good, I'll send you a patch. Cheers Andrea ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Geotools-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-devel
