[postgis-users] transformation discrepancy with postgis v. cs2cs

[Paul Ramsey]

Does apt have a search function? Probably the proj packagers broke the
grid files out into a different proj-something package?

P

On Fri, Mar 26, 2010 at 10:23 AM, Bryan Keith <bryan at ideotrope.org> wrote:
>>>>
>>>> Something is definitely strange with the PROJ.4 installation on that
>>>> one system. If I had to guess, you compiled PROJ.4 yourself, but
>>>> didn't unzip the gridshift files in the nad folder before ./configure
>>>> ? It should be apparent that the grid shift files are installed with
>>>> the make install command.
>>>
>>>
>>>>
>>>> Try reinstalling the PROJ.4 library with the gridshift files intact,
>>>> and it should affect both PostGIS and cs2cs (since they use the same
>>>> system library).
>>>
>>> Should I just try:
>>>
>>> sudo apt-get install proj
>>
>> I tried this and got the message:
>>
>> proj is already the newest version.
>> proj set to manually installed.
>>
>> Manually installed?  I wonder why that is.
>>
>> Where is it installed?  I search for a nad directory and only found this
>> one:
>>
>> /usr/lib/grass/etc/nad
>>
>> I didn't try doing the coordinate conversion in GRASS since I don't know
>> how to use GRASS, but the nad directory seems to have the uncompressed
>> grid shift files:
>>
>> -rw-r--r-- 1 root root 1053896 2008-05-29 14:33 alaska
>> -rw-r--r-- 1 root root  264392 2008-05-29 14:33 conus
>> -rw-r--r-- 1 root root    8840 2008-05-29 14:33 FL
>> -rw-r--r-- 1 root root  451976 2008-05-29 14:33 hawaii
>> -rw-r--r-- 1 root root    3528 2008-05-29 14:33 MD
>> -rw-r--r-- 1 root root 1113184 2008-05-29 14:33 ntv1_can.dat
>> -rw-r--r-- 1 root root  318464 2008-05-29 14:33 nzgd2kgrid0005.gsb
>> -rw-r--r-- 1 root root   26696 2008-05-29 14:33 prvi
>> -rw-r--r-- 1 root root   59176 2008-05-29 14:33 stgeorge
>> -rw-r--r-- 1 root root   26696 2008-05-29 14:33 stlrnc
>> -rw-r--r-- 1 root root    7016 2008-05-29 14:33 stpaul
>> -rw-r--r-- 1 root root    4392 2008-05-29 14:33 TN
>> -rw-r--r-- 1 root root    6728 2008-05-29 14:33 WI
>> -rw-r--r-- 1 root root   11080 2008-05-29 14:33 WO
>>
>> I appreciate any suggestions.  I don't really know what I'm doing here.
>
> I tried reinstalling proj:
>
> sudo apt-get --reinstall install proj
>
> Do I need to do anything else to get the grid shift files?  Where should
> they be installed?  In the readme files, they give a cs2cs example, but I
> don't get the correct results.  Here's my version:
>
> cs2cs +proj=latlong +datum=NAD27 +to +proj=latlong +datum=NAD83
> -117 30
> 117dW   30dN 0.000
>
> Should be:
> 117d0'2.901"W   30d0'0.407"N 0.00
>
> Clearly I don't have the grid shift files, but I'm not sure where I'm
> supposed to get them or where they're supposed to be.
>
> Bryan
>
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