[Proj] Proj Digest, Vol 80, Issue 5

[Eric Miller]

Does it work correctly if you use the same input and output datum?  That is, just have cs2cs run through one or two projections without a datum shift.

For instance:

C:\proj\bin> cs2cs +proj=latlong +datum=NAD83 +to +proj=utm +zone=10 +datum=NAD83 -r
45d15'33.1 111.5W
1402197.69      5076490.88 0.00
^C

If that works, then I still suspect a problem with the grid files.  It could be something as silly as copying the files over FTP in ASCII mode...

>>> On 1/12/2011 at 3:06 PM, "R. Jay Flaming" <jflaming at uw.edu> wrote:
> I think maybe I'm missing something more basic.  I tried running it in
> a 32 bit machine, but I'm still getting fails on the first entry.  For
> example, if I load this data into a file (JunkDataUTM):
> 553749.32 5255410.43
> 552739.32 5255400.43
> 552749.52 5255410.63
> 
> And then run:
> c:\proj\bin>C:/proj/bin/cs2cs.exe +proj=utm +zone=10 +datum=NAD27 +to
> +proj=latlong +datum=NAD83 c:/proj/bin/JunkDataUTM
> 
> This is the output:
> 
> *       * 0.000
> 47d27'14.454"E  42d12'42.477"N 0.000
> 47d27'14.784"E  42d12'42.7"N 0.000
> 
> No matter what I put in my first entry (whether from a file or by
> stdin), I get the
>  *       * 0.000 result.
> 
> 
> Other weirdness... if I try the examples from the man page
> (http://trac.osgeo.org/proj/wiki/man_cs2cs)
> and enter this command:
> c:\proj\bin>cs2cs +proj=latlong +datum=NAD83 +to +proj=utm +zone=10
> +datum=NAD27 -r
> 
> and then first try:
> 45d15'33.1" 111.5W
> 
> this is the result:
> *       * 0.000
> 
> if I repeat the same numbers on a second try:
> 45d15'33.1" 111.5W
> 
> the second time I get this result:
> 53329298.26     0.00 0.000
> 
> 
> Jay
> 
> 
> 
> 
> On Wed, Jan 12, 2011 at 9:00 AM,  <proj-request at lists.maptools.org> wrote:
>> I'm going to guess that your binary NAD files (conus, etc.) do not match 
> your architecture.  If your Proj.4 binaries are 64-bit, you need 64-bit NAD 
> files.  Likewise, if you have 32-bit binaries, you need 32-bit NAD files.  You 
> can confirm that is the problem by using cs2cs with +towgs84 parameters 
> instead of +nadgrids.
>>
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