Arrrgh! Resampling a gridded coverage. Is this a service (ala 19119; i.e. portrayal), or a feature operation concept (ala 19126/N2052)?
A service is a thing external to a coverage, which operates on a coverage. If a particular service implementation is optimized for a particular coverage implementation, it'll have dependencies on the coverage internals. (It'll use Simone's cool JAI stuff on coverages which it knows to be backed by J2SE Images, and won't work on other implementations.) A feature operation concept is a common method name, parameter list, and return type. This could well manifest itself as a "ResamplingCoverage" interface with a "resample(x,y,width,height,crs)" method. Interested coverage classes could implement this interface. This puts the code for resampling INSIDE all coverage classes. Resampling is something that is tightly coupled to the particular coverage implementation (will be implemented very differently for JAI images than for MultiArray2 images.) Resampling is also something that doesn't care at all about implementation (could be written entirely using the evaluate() method, or as a web processing service on a different computer than the WCS). Resampling is something that we want to mean the same thing regardless of implementation (JAI and multiarray2 coverage implementations should provide a method of the same name, with the same parameters, and have the same meaning.) 19119 is published; 19126 is not. I am leaning towards making it a service. It just seems to allow more room for growth and be more maintainable. Please comment. There's other things which need this kind of attention too, like contouring. It's be helpful if we adopted a way of thinking about these things. Bryce "It's just a little harmless brain alteration, that's all!" -Wallace ------------------------------------------------------------------------- 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 Geotools-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-devel
