Plate Carre with latitude shift

[Ed McNierney]

Frank -

Well, I can't claim to know that it actually DOES anything.....

A long time ago I was writing graphics display hardware device drivers,
and a new version of the Microsoft C compiler had just been released
with support, for the first time, for the "volatile" keyword.  This
keyword modified a pointer declaration and told the compiler that the
value pointed to (a hardware status register, for example) might change
without the program's knowledge.  References to it, therefore, could not
be optimized away and the value actually read each time the pointer was
dereferenced.

I spent a day trying to get the keyword to work, and it just wasn't
working.  I finally read the README file and found one of the more
memorable technical euphemisms I've ever read:

	"The keyword 'volatile' is implemented syntactically but not
semantically."

That's the fanciest way I've ever seen to say, "It doesn't work, but we
won't tell you!"

	- Ed

-----Original Message-----
From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On
Behalf Of Frank Warmerdam
Sent: Wednesday, January 16, 2008 12:01 PM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: Re: [UMN_MAPSERVER-USERS] Plate Carre with latitude shift

Ed McNierney wrote:
> Frank -
> 
> My comment to Espen, "The lat_ts parameter is the latitude of true
scale, and causes that latitude to be drawn at true scale, reducing
distortion at that latitude", seems in conflict with your comment "Are
you hoping to get one projected meter being one meter on the ground
> at 60N as opposed to it being one meter at the equator as is the
default?  I'm not aware of proj=eqc supporting any such option."
> 
> It sounds like I am misunderstanding what lat_ts does.  If it doesn't
do what I thought (cause 60N to be the latitude of true scale, where one
meter in map units equals one meter on the ground), what does it do?

Ed,

I stand corrected.  Lat_ts is indeed a supported parameter for eqc.  I
had
just never used it and didn't realize it was supported for that
projection.

I'll just shut up now. :-)

Best regards,
-- 
---------------------------------------+--------------------------------
------
I set the clouds in motion - turn up   | Frank Warmerdam,
warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | President OSGeo,
http://osgeo.org