[MetaCRS] Translation WGS84 to Mercator

[Frank Warmerdam]

Косолапов Глеб wrote:
>> Косолапов Глеб wrote:
>>
>>>  Hi, everyone from Russia!
>>>
>>>  I'm using proj4js with OpenLaerys.
>>>  I must translate WGS84 to Mercator (EPSG:3395, for example).
>>>  My country lies through 180th meridian (antimeridian). So, in WGS84 this territory ends near 190 longitude. And everything works fine.
>>>  But when I transform 190 lat to Mercator, I get negative value -18924313.434856504. That's very bad for every operation with Mercator coordinates in OpenLayers.
>>>
>>>  Please, help me how to transform 190 lat to positive Mercator using proj4js...
>> Gleb,
>>
>> PROJ.4 has the +over flag which avoids normalizing the longitude to -180
>> to 180 before the transformation is done.  Perhaps this should be introduced
>> in proj4js as well?
...
> Frank, thank you for answer!
> Tell me please, where can I find this flag in proj4js? There is no such property...

Hi,

PROJ.4 is the C projections library that was a source of inspiration
for the Proj4js package.  I wasn't suggesting that proj4js supports
+over, but instead that perhaps this ability should be added in a manner
similar to how it exists in PROJ.4.

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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