[Proj] Rectified Skew Orthomorphic...

Michael Childs mike at globalmapper.com
Thu Feb 8 17:51:54 EST 2007

SUCCESS! My points now agree to less than a millimeter with the expected
results! It was the rot_conv that I needed, I didn't realize that I needed
the gamma angle passed in. I cannot thank you enough for your help! If you
would like a complimentary license for Global Mapper 8, just contact me at
mike at globalmapper.com and I'll be happy to provide you with one.


Mike Childs
Global Mapper Software LLC
support at globalmapper.com

-----Original Message-----
From: proj-bounces at lists.maptools.org
[mailto:proj-bounces at lists.maptools.org] On Behalf Of Oscar van Vlijmen
Sent: Thursday, February 08, 2007 1:59 PM
To: PROJ.4 and general Projections Discussions
Subject: Re: [Proj] Rectified Skew Orthomorphic...

> From: "Michael Childs"
> Date: Thu, 8 Feb 2007 10:19:42 -0600
> Subject: RE: [Proj] Rectified Skew Orthomorphic...

> Thank you again for the information, but I am still not replicating the
> results exactly. I am using the following proj4 string:

> +proj=omerc +a=6378137.000 +b=6356752.314 +lat_0=4 +lonc=115 +x_0=0 +y_0=0
> +alpha=53.315809950000 +k=0.9998400000 +no_uoff"

> Is there a parameter that I am missing?
rot_conv perhaps?
I can reproduce your values by setting the rotation angle to alpha in my
software. The rotation angle should be Gamma, hence my suggestion of

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