merc with lat_ts (svn#83)

[madair]

from http://trac.osgeo.org/proj4js/ticket/83

I think there is an error in transformation from WGS84 geographical to a mercator projection with setting lat_ts parameter.

Proj4js.defs["EPSG:70212"]="+proj=merc +lon_0=0 +lat_ts=54 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs";
>var src = new Proj4js.Proj('EPSG:4326');
var dest = new Proj4js.Proj('EPSG:70212');

var point = new Proj4js.Point(8.4166666666,54.3);
Proj4js.transform(src, dest, point);

The calculated result with proj4js is: x=550727.0313354909 y=4227680.065624116

By using cs2cs or http://cs2cs.mygeodata.eu/ I get the following results: x=551929.429093 y=4236910.32443

[calvinmetcalf]

so running the following (which is equivalent to what you wrote but in more compact syntax)

proj4("+proj=merc +lon_0=0 +lat_ts=54 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs").forward([8.4166666666,54.3])

I get [551929.4290927176, 4236910.324427377]

[madair]

I'm getting the same result as well, it must have been fixed with some other fixes, closing this one