#1452: wx location wizard doesn't ask for datum transform options because proj4 4.7.1's epsg file is broken -------------------------------------------+-------------------------------- Reporter: hamish | Owner: grass-dev@… Type: defect | Status: new Priority: critical | Milestone: 6.4.2 Component: Projections/Datums | Version: svn-releasebranch64 Keywords: wingrass, location wizard, wx | Platform: MSWindows XP Cpu: x86-32 | -------------------------------------------+--------------------------------
Comment(by hamish): * It seems that upstream epsg file is broken. (!) on Wingrass 6.4svn nightly build: in the projection wizard, proj=ll datum=nad27 does give the datum transform table menu in the projection wizard, proj=ll datum=nad83 does '''not''' give the datum transfotm menu. for one NAD83 datum found in the epsg file: {{{ g.proj epsg=4152 datumtransform=-1 }}} gives this error: {{{ WARNING: Datum <NAD83_High_Accuracy_Regional_Network> not recognised by GRASS and no parameters found }}} however another datum=nad83 (epsg:4269) does show table. ?! at this point I went poking around and noticed that the $PROJ_LIB/epsg file on wingrass is '''missing''' a lot of datum= and instead had expanded +towgs84= terms. If datum= had remained you might be able to work around it, but that has not been preserved. locally I have proj 4.7.0 installed: epsg file is ok. wingrass ships proj 4.7.1: epsg file includes lots of +towgs84 terms that are not part of the formal epsg definition! they've just been irreversibly expanded on a random assumption. crap. fwiw proj 4.7.1 has not been formally released AFAIK (so why the @#$!! heck is osgeo4w shipping it??) Hamish -- Ticket URL: <https://trac.osgeo.org/grass/ticket/1452#comment:3> GRASS GIS <http://grass.osgeo.org>
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