[Proj] Re: datum shifting - cs2cs build or config problem?

[Mark Cheyne]

I get the same result from nad2nad as I get from
NADCON and WISCON:

C:\proj>nad2nad -i 83 -i hpgn=WI -o 83 -w5
-89.8 44.166666667
89d48'0.00849"W 44d9'59.99715"N

But as reported below, I get something else from
cs2cs:

> C:\proj>cs2cs +proj=latlong +ellps=GRS80
> +datum=NAD83
> +nadgrids=wi +to +proj=latlong
> +ellps=GRS80+datum=NAD83
> -89.8 44.166666667
> 89d47'59.992"W  44d10'0.003"N 0.000

I've tried noodling with my syntax, any suggestions
would be appreciated.

Mark

--- Mark Cheyne <cheynm at yahoo.com> wrote:

> Partially solved. I quickly found one explanation -
> my
> $PROJ_LIB was set to c:\proj, but it needed to be
> set
> to c:\proj\nad.
> 
> So now I can run the example from the FAQ correctly.
> Good sign.
> 
> However, consider this:
> 
> C:\proj>cs2cs +proj=latlong +ellps=GRS80
> +datum=NAD83
> +nadgrids=wi +to +proj=latlong
> +ellps=GRS80+datum=NAD83
> -89.8 44.166666667
> 89d47'59.992"W  44d10'0.003"N 0.000
> 
> What I am trying to say is that the input point is
> NAD83HPGN(WI), and I want output in NAD83. I've run
> this example through both NADCON and WISCON, both
> give
> me the same result, different from what I got above:
> -89 48 0.00849  44 9 59.99715
> 
> So it probably now comes down to user error - am I
> not
> specifying that cs2cs command line correctly?
> 
> Mark 
> 
> 
> 
> --- Mark Cheyne <cheynm at yahoo.com> wrote:
> 
> > I'm trying to test my proj configuration.
> > 
> > There is an example in the FAQ
> > http://proj.maptools.org/faq.html:
> > 
> > cs2cs +proj=latlong +datum=NAD27 +to +proj=latlong
> > +datum=NAD83 
> > -117 30
> > 
> > producing:
> > 
> > 117d0'2.901"W   30d0'0.407"N 0.000
> > 
> > But when I try it, the following is produced:
> > 
> > 117dW   30dN 0.000
> > 
> > That is, the output is identical to the input.
> > 
> > I am using binaries I built myself on Windows from
> > the
> > 4.5 source. 
> > 
> > If I try the 4.4.6 binaries that are available
> from
> > http://proj.maptools.org/ I get even worse
> results:
> > 
> > *       * 0.000
> > 
> > another symptom is what happens when I try to use
> > nad2nad. For example:
> > 
> > nad2nad -i 83 -i hpgn=WI -o 83
> > 
> > yields:
> > 
> > <nad2nad>:
> > hp datum file: WI, failed: No such file or
> directory
> > program abnormally terminated
> > 
> > I'm pretty out of my element when it comes to
> > building
> > the source - merely trying to follow instructions.
> > To
> > do it, I used Visual Studio 2003 and the
> commandline
> > 'nmake /f makefile.vc all' on the source located
> at
> > c:\proj\src, and I have c:\proj\nad containing the
> > *.lla grid shift files, and I also have $PROJ_LIB
> > set
> > to c:\proj. When the build runs, all the binary
> grid
> > shift files get created, a good sign.
> > 
> > Sorry if this is old hat, but I'm not having good
> > luck
> > trying to search the email list archive...
> > 
> > A homebrew for an explanation.  ;-)  Thanks, Mark
> > 
> > 
> >      
> >
>
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> > 
> 
> 
> 
>      
>
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      ____________________________________________________________________________________
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