[Mapbender_dev] EPSG:4326 tend to take random values even though maps are nearly the same

[Marc Jansen]

Hi Abhishek,

just a quick guessing here, but with a geographic projection like 4326 
scale isn't trivial to calculate, as there are AFAICT two scales to be 
considered (at the poles the metric distance between lon-values is 
zero). With Mercator-based projections both axises share the same scale.

I am always more or less unsure about this stuff, so if the above 
contains errors, don't throw stones at me.

Regards,
Marc



On 20.05.2010 10:33, Abhishek Singh wrote:
> Hi,
>
> I am having some problem with the scales values that appear in case of 
> epsg:4326 and epsg:31467 in gui1. I have modified the getScale(), code 
> snippet is available at http://osgeo.pastebin.com/U44pVU2v .The 
> problem is that even though maps nearly appear to be the same for 
> epsg:4326 and epsg:31467, the scale values aren't showing that 
> correspondence. The scale values in case of epsg:4326 tend to take 
> scale values like 1:14, 1:19 etc.
> please suggest how to remove that error.
>
> Thanks,
>
> Abhishek Kumar Singh
> BE/1349/2007
> Information Technology
> 6th SEMESTER
> BIT MESRA
>
>
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>    


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   Dipl.-Geogr. Marc Jansen
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