Jody Garnett ha scritto: > What is confusing for me is this: > - the uesr guide already documents this code; do you think we have had > a regression? > - Emily you needed to change the definition a bit; as far as I know > the interesting part about supporting the google projection was adding > support for a perfect sphere; that support should now be present (and > hence expected the wkt in the user guide to pass). > > We do have the concept of an alias in order to sort out the multiple > ways in which WKT and the EPSG databsae have to refer to things; do we > need to add an alias for "Mercator (1SP) (Spherical)". I would expect > the Spherical to be significant- since previously this additional java > code to support. > > - http://docs.codehaus.org/display/GEOTDOC/08+Google+Maps+Projection
If you look into the EPSG wkt that we are using today you'll see that we use the usual Mercator but there is an extra parameter: PARAMETER["semi_minor", 6378137.0] that forces the spherical interpretation. This was introduced by Martin time ago: http://jira.codehaus.org/browse/GEOT-1511 Happily enough I do still have my original GeoServer solution that introduced a custom projection, just like EPSG did: https://svn.codehaus.org/geoserver/trunk/src/main/src/main/java/org/geotools/referencing/operation/projection/Mercator1SPGoogle.java I think I can port that back to GeoTools and make sure it matches with the EPSG name. Then I will have to make sure the transformation results are really the same as the current approach (which is known to be working). Cheers Andrea ------------------------------------------------------------------------------ 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
