[GRASS-user] cs2cs Command Syntax Check

[Rich Shepard]

On Tue, 28 Feb 2012, Tom Russo wrote:

> No.  Nevada East Zone State Plane Coordinate System is not the same as
> UTM, Zone 11 (even though it may lie in UTM zone 11).

   Thanks, Tom. It's been long enough since I last needed to do this type of
conversion that I forgot to use the EPSG numer.

> What you want is to tell cs2cs to use the EPSG number 3421 as the target
> coordinate system. From the PROJ.4 epsg file, that means:
>
> # NAD83 / Nevada East (ft US)
> <3421> +proj=tmerc +lat_0=34.75 +lon_0=-115.5833333333333 +k=0.9999 +x_0=200000.00001016 +y_0=8000000.000010163 +ellps=GRS80 +datum=NAD83 +units=us-ft +no_defs  <>
>
> which you can see matches your PROJ_INFO information.

> (On my system, the EPSG database for PROJ.4 is in
> /usr/local/share/proj/epsg)

   On my Slackware systems it's /usr/share/proj/epsg.

> You should use this command line instead:
> cs2cs +proj=latlong +datum=NAD83 +to +init=epsg:3421

   Good. I don't need to separately specify each parameter, then.

   Glad I asked for the reality check. :-)

Much appreciated,

Rich