Conversion help

[` `]

Some javascript/style in this post has been disabled (why?)

I need to convert waypoints from State Plane, NAD 83 4302 - Utah Central, U.S. Feet to Geographic, NAD 83.  Here is some data:
original data:
    7276845.40800,1473458.11800
nad2nad conversion (nad2nad -i spcs=4302,rev,83,feet -o 83,rev -w7 reversedConversion.txt | head -1):
    40d8'56.1498803"N    117d22'21.7731358"W,1473458.11800
data converted with corpscon:
    40 17 43.03866,112 05 54.83550

the longitude needs to be negative, but other than that the coordinates are fine from corpscon.  What am I doing wrong and how can I fix this?

-Daniel

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[Eric Miller]

Same results that you think are incorrect:

$> proj -I +init=nad83:4302 +units=us-ft
1473458.118 7276845.408
112d5'54.835"W  40d17'43.039"N

It's possible the definition for the state plane zone is incorrect in the nad83 file.

>>> On 9/3/2009 at 12:17 PM, ` ` <[hidden email]> wrote:

>
>
>
>
>
>
> I need to convert waypoints from State Plane, NAD 83 4302 - Utah Central,
> U.S. Feet to Geographic, NAD 83.  Here is some data:
> original data:
>     7276845.40800,1473458.11800
> nad2nad conversion (nad2nad -i spcs=4302,rev,83,feet -o 83,rev -w7
> reversedConversion.txt | head -1):
>     40d8'56.1498803"N    117d22'21.7731358"W,1473458.11800
> data converted with corpscon:
>     40 17 43.03866,112 05 54.83550
>
> the longitude needs to be negative, but other than that the coordinates are
> fine from corpscon.  What am I doing wrong and how can I fix this?
>
> -Daniel
>
> _________________________________________________________________
> With Windows Live, you can organize, edit, and share your photos.
> http://www.windowslive.com/Desktop/PhotoGallery

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[OvV_HN]

----- Original Message -----
From: "` `" <[hidden email]>
To: <[hidden email]>
Sent: Thursday, September 03, 2009 9:17 PM
Subject: [Proj] Conversion help



I need to convert waypoints from State Plane, NAD 83 4302 - Utah Central,
U.S. Feet to Geographic, NAD 83.  Here is some data:
original data:
    7276845.40800,1473458.11800
nad2nad conversion (nad2nad -i spcs=4302,rev,83,feet -o 83,rev -w7
reversedConversion.txt | head -1):
    40d8'56.1498803"N    117d22'21.7731358"W,1473458.11800
data converted with corpscon:
    40 17 43.03866,112 05 54.83550



Reply:

I think I've got part of the solution.
Somehow your x was interpreted as zero.
If you convert x = 0; y = 7276845.40800; to LCC without further grid
interpolation, then you'll get
lat = 40d 08m 56.14988s, lon = -117d 22m 21.77314s
The Corpscon values are correct for SPCS 4302 and x = 1473458.11800; y =
7276845.40800;, also without grid interpolation.

Oscar van Vlijmen



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[` `]

Some javascript/style in this post has been disabled (why?)

I believe if I use "proj -I +init=nad83:4302 +units=us-ft" with the input file it should work.  I have tested the conversions against the corpscon program and they work.  Thank you for your help.

-Daniel

> From: [hidden email]
> To: [hidden email]
> Date: Sat, 5 Sep 2009 11:06:32 +0200
> Subject: Re: [Proj] Conversion help
>
> ----- Original Message -----
> From: "` `" <[hidden email]>
> To: <[hidden email]>
> Sent: Thursday, September 03, 2009 9:17 PM
> Subject: [Proj] Conversion help
>
>
>
> I need to convert waypoints from State Plane, NAD 83 4302 - Utah Central,
> U.S. Feet to Geographic, NAD 83. Here is some data:
> original data:
> 7276845.40800,1473458.11800
> nad2nad conversion (nad2nad -i spcs=4302,rev,83,feet -o 83,rev -w7
> reversedConversion.txt | head -1):
> 40d8'56.1498803"N 117d22'21.7731358"W,1473458.11800
> data converted with corpscon:
> 40 17 43.03866,112 05 54.83550
>
>
>
> Reply:
>
> I think I've got part of the solution.
> Somehow your x was interpreted as zero.
> If you convert x = 0; y = 7276845.40800; to LCC without further grid
> interpolation, then you'll get
> lat = 40d 08m 56.14988s, lon = -117d 22m 21.77314s
> The Corpscon values are correct for SPCS 4302 and x = 1473458.11800; y =
> 7276845.40800;, also without grid interpolation.
>
> Oscar van Vlijmen
>
>
>
> _______________________________________________
> Proj mailing list
> [hidden email]
> http://lists.maptools.org/mailman/listinfo/proj

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