German projection help

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#1 Hans van der Maarel Posted 04 July 2010 - 08:36 AM

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Okay, my highschool-German isn't up to this task, so I'm hoping one of our German-speaking members can help me out. I've been asked to produce a map, of Germany, in Polar Stereographical projection, centered on a given point. No problems there. But there's some additional descriptive text on the projection which says:

Die Projektionsebene scheidet die Erdkugel bei 60 gr N. Das kartesische Koordinatensystem besitzt eine Grosse von 900 x 900 km und ist parallel zum 10 gr E meridian ausgerichtet. Als Bezugspunkt wurde der Mittelpunkt des Komposits mit 9 gr E und 51 gr N festgelegt.

So as far as I can tell, it's centered on 51N 9E, but what do the other 2 sentences mean?
Hans van der Maarel - Cartotalk Editor
Red Geographics

#2 Michael Schmeling Posted 04 July 2010 - 10:13 AM

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"The projection plane intersects the earth sphere at 60 degrees N. The cartesian coordinate system has a size of 900 x 900 km and is parallel to the 10 degree E meridian. The point of reference is the center point of the composite (?) at 9 degrees E and 51 degrees N."

Hope this helps!
Michael Schmeling
Kassel, Germany
Arid Ocean Map Illustrations
http://maps.aridocean.com
Indie Cartographer
http://www.indiecartographer.com

#3 Hans van der Maarel Posted 04 July 2010 - 10:44 AM

Hans van der Maarel

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"The projection plane intersects the earth sphere at 60 degrees N. The cartesian coordinate system has a size of 900 x 900 km and is parallel to the 10 degree E meridian. The point of reference is the center point of the composite (?) at 9 degrees E and 51 degrees N."

So if I read this correctly, the centerpoint of the projection is at 60N 10E rather than 51N 9E?
Hans van der Maarel - Cartotalk Editor
Red Geographics

#4 Michael Schmeling Posted 04 July 2010 - 10:49 AM

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So if I read this correctly, the centerpoint of the projection is at 60N 10E rather than 51N 9E?

That's how I understand it, yes.
Michael Schmeling
Kassel, Germany
Arid Ocean Map Illustrations
http://maps.aridocean.com
Indie Cartographer
http://www.indiecartographer.com

#5 Hans van der Maarel Posted 07 July 2010 - 04:56 AM

Hans van der Maarel

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So if I read this correctly, the centerpoint of the projection is at 60N 10E rather than 51N 9E?

That's how I understand it, yes.

Quick follow-up: looks like you were right. Thanks!
Hans van der Maarel - Cartotalk Editor
Red Geographics

#6 Michael Schmeling Posted 07 July 2010 - 05:17 AM

Michael Schmeling

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You are welcome, Hans!
Michael Schmeling
Kassel, Germany
Arid Ocean Map Illustrations
http://maps.aridocean.com
Indie Cartographer
http://www.indiecartographer.com

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