PROJ.4

[Gerald I. Evenden]

>From: KLENKUS1 at VAXC.STEVENS-TECH.EDU
>Date: Thu, 02 Jun 1994 16:56:28 -0400 (EDT)
>Subject: PROJ.4
>To: grassu-list at max.cecer.army.mil
>
>HELP!!!!
>
>Im trying to convert from UTM to State Planer for NJ.
>
>For zones:
>		utm zone = 18
>		NJ  zone = 2900
>
>Unfortunately, Im getting an error when converting from
>UTM to Lat/LONG because the * symbol appears.
>
>proj +proj=utm +zone=18 +inv

What release are you using?  Just type proj to find out.
The +inv relates to defunct rel 3.

For a point in Newark (-74d10 40d44):

proj +proj=utm +zone=18 +ellps=clrk66 -I -o <<EOF | \
proj +init=nad27:2900 -i +units=us-ft
570368.57       4509277.73
EOF

produces:

2138572.03      692482.49

Nad2nad is a little easier:

nad2nad -i utm=18 -o spcs=2900,feet <<EOF
570368.57       4509277.73
EOF

2138572.03      692482.49

>After this I enter the coordinates I recieved from the
>reverse direction, and thus an error appears!
>
>Does anyone know of a way to convert from UTM to State
>planer without going through Lat/Long?  Or can solve my
>current problem.
>
>Thanks for any help.
>
>Kym M. Lenkus
>Davidson Laboratory

Gerald (Jerry) I. Evenden   Internet: gie at charon.er.usgs.gov
voice: (508)563-6766          Postal: P.O. Box 1027
  fax: (508)457-2310                  N.Falmouth, MA 02556-1027