#667: please allow to export projection information in more formats --------------------------+------------------------------------------------- Reporter: timmie | Owner: [email protected] Type: enhancement | Status: new Priority: normal | Milestone: 6.5.0 Component: default | Version: svn-develbranch6 Resolution: | Keywords: g.proj Platform: Linux | Cpu: x86-32 --------------------------+------------------------------------------------- Comment (by hamish):
> Do you not think that the format +proj=longlat +ellps=WGS84 +datum=WGS84 ... > cannot be converted back to the corresponding EPSG number? adding datum transform parameters is a non-reversible process. likely there is precision and other translation/expansion issues as well. Neither Frank's EPSG DB -> PROJ.4 epsg file nor QGIS's +proj4 term matching code has a solution yet, and that's before you consider that we maintain our own ellipse and datum tables which may add and/or modify terms. I don't want to say it can't be done, but it's not easy and I would not trust well any result which claims to be able do it to be complete. IMHO better to just use the explicit expanded version and not worry.. Hamish -- Ticket URL: <https://trac.osgeo.org/grass/ticket/667#comment:7> GRASS GIS <http://grass.osgeo.org>
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