[OSM-talk] JOSM and scale

[Andy Robinson (blackadder)]

Robert (Jamie) Munro wrote:
>Sent: 25 March 2008 10:27 PM
>To: Juan Lucas Dominguez Rubio
>Cc: talk at openstreetmap.org
>Subject: Re: [OSM-talk] JOSM and scale
>
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>Juan Lucas Dominguez Rubio wrote:
>|  > In Mercator distance is constant independent of orientation, isn't it?
>|
>| I don't know what you mean exactly.
>|
>| If you use JOSM with the Mercator projection and draw a perfect circle
>| in the North of Sweden, you are actually drawing a horizontal ellipse
>| (east-west oriented) in the real world.
>
>Are you sure you are talking about the Mercator projection? AFAIK, if
>the circle is small, it will remain a circle. In the mercator
>projection, as you move away from the equator the lines move further apart.
>
>The amount of distortion will depend on how large the circle is and how
>far it is from the equator.
>

Indeed, drawing in the new
http://en.wikipedia.org/wiki/Large_Hadron_Collider tunnels at CERN will be
interesting :-)

Cheers

Andy

>Robert (Jamie) Munro
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