Hello all There were talk recently about Coverage on both GeoAPI and GeoTools list, so I take this opportunity to clarify a situation and anounce what may be a future change.
Why org.opengis.coverage.grid.GridRange has been deprecated ----------------------------------------------------------- GridRange was defined in legacy OGC 01-004 specification. It has been replaced in ISO 19123 by GridEnvelope, which serve the same purpose. We could have keep the "GridRange" name for compatibility with legacy applications. The problem is that the word "range" has a very different meaning in ISO 19123 than it had in OGC 01-004. ISO defines the range of a coverage as the set of feature attribute values that can be returned by the "evaluate(DirectPosition)" method. Coverage methods like "getRangeType()" and "getRangeElements()" (defined by ISO) use this definition. On the OGC WCS mailing list, I'm reading emails using "grid range" in the sense of "the set of all possible pixel values". In this context the interface name "GridRange" inherited from the legacy specification was clearly problematic. This kind of problem has been detected years ago and the legacy interfaces flagged with big warning in their javadoc anouncing that they will change or be removed. What need to be changed ----------------------------------------------------------- For the reason explained above, the GridGeometry.getGridRange() method name is problematic because the returned value is absolutly not a grid range according ISO 19123. It would not be a big issue if the name "grid range" was not used for something else (so they would be no confusion), but in the context of ISO 19123 it is. No action on the method name has been taked so far because we have not yet investigated how the legacy GridGeometry interface could be integrated with the ISO 19123 interfaces and what should be preserved. The getGridRange() method is replaced by Grid.getExtent() in ISO, but I think that at least getGridToCRS() needs to be preserved. In the mean time, GridGeometry still flagged as an interface that need revision. Please note the big warning box which exists since 2005: http://geoapi.sourceforge.net/snapshot/pending/org/opengis/coverage/grid/GridGeometry.html Martin P.S.: I'm registered on the geotools mailing list only in "digest" mode. Since this topic is about GeoAPI interfaces, if there is a wish to make technical discussion about what may be changed, when and how to do the transition, I suggest to use the GeoAPI mailing list. ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Geotools-devel mailing list Geotools-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-devel
