On Tue, Dec 16, 2008 at 9:57 PM, Richard Greenwood <[email protected]> wrote: > On Mon, Dec 8, 2008 at 6:08 PM, Dylan Beaudette <[email protected]> > wrote: >>> Richard Greenwood wrote: >>> The files in http://svn.osgeo.org/metacrs/proj/trunk/proj/nad/ are >>> ASCII. In the nad directory, you need to do: >>> ./configure >>> make >>> install >>> to create the binary grid shift files that proj actually uses. (Proj >>> doesn't read the ASCII files). And I'm not sure that the >>> config-make-install of the proj program does the nad directory. >>> >>> Rich >> >> REALLY? >> >> I have never heard that the config-make-make install steps would not process >> the NAD grid files... Can someone verify this? >> >> Cheers, >> >> Dylan > > > Dylan > > On my Ubuntu 8.04 with a binary proj installed from the Ubuntu repository I > get: > echo '-121.000000 37.000000' | cs2cs +proj=latlong +datum=NAD27 \ > +to +proj=latlong +datum=NAD83 > 121dW 37dN 0.000 # obviously no datum transform > > So I fetched the proj source and proj-datumgrid-1.4.zip and did > ./configure make make install. But still no datum transform from my > new copy of proj. So I did: > > $ nad2bin <src/proj-4.6.1/nad/proj-datumgrid-1.4/conus.lla conus > > and copied it to /usr/share/proj/ and finally I get the expected results: > > $ echo '-121.000000 37.000000' | cs2cs +proj=latlong +datum=NAD27 +to > +proj=latlong +datum=NAD83 > 121d0'3.704"W 36d59'59.804"N 0.000 > > The only copy of conus that $ locate found on my system prior to my > making it with nad2bin was in /usr/lib/grass/etc/nad/ Probably doing > $ export PROJ_LIB=/usr/lib/grass/etc/nad/ would have saved me making > conus.
Following up on this with a little morning clarity... If you un-zip the *.lla fiiles in proj-datumgrid-1.4.zip into the proj/nad directory before you build, then configure, make, install does convert them to binary and copy them to the share/proj directory. However, I am troubled that the Ubuntu proj distribution does not seem to include the grid ship files. -- Richard Greenwood [email protected] www.greenwoodmap.com _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
