Jody Garnett a écrit : > Frank is out and about trying to help us on the EPSG data front ... > Thanks for taking action Frank, can you CC the devel list on further > communication - not sure what other projects are effected. > > -------- Original Message -------- > From: Frank Warmerdam > > [...snip...] > > My concern is that these projects mostly just distributed lists of > coordinate systems derived from the EPSG files, but expressed in another > format such as OGC Well Known Text, or PROJ.4 initialization strings. The > problem with this is that such representations clearly violate items (1) and > (2). That is, they don't include all data about the coordinate system, nor > do they include all related records. For instance, fields like "remarks" > cannot be represented in WKT. And related records such as from the area > of use table are generally not included.
Just a side note: in the specific case of Geotools, we can be in strict compliance with current EPSG requirements. The gt2-epsg-hsql plugin is bundled with an unmodified copy of the full EPSG database, including remarks and all stuff like that. It work "out of the box" without any specific action from the user side. Since Geotools 2.3, GeoServer and uDig should be able to use directly the epsg-hsql plugin even if they still require (longitude,latitude) axis order. Getting those projects to switch from gt2-epsg-wkt to gt2-epsg-hsql would allow us to avoid distributing a trimmed version (the WKT one) of the EPSG database. The main issue is that gt2-epsg-wkt contains some additional CRS not defined in the official EPSG database. If we want to preserve those additional CRS, we need to implement a "authority factory fall back" mechanism. This is the subject of http://jira.codehaus.org/browse/GEOT-774 and is already partially implemented. Martin. ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Geotools-devel mailing list Geotools-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-devel
