I am a really beginner into web-cartography, so sorry if this subject is rudimentary or basic but I truly search for a long time and I am still stick in it.
So the problem is:
I don't understand why this code don't convert correctly my coordinates (exprimed in google mercator epsg:900913) to WGS84 web mercator epsg:4326:
Proj4js.defs["EPSG:4326"] = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"; Proj4js.defs["EPSG:900913"]= "+title=GoogleMercator +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs"; var dest = new Proj4js.Proj("EPSG:4326"); var source = new Proj4js.Proj("EPSG:900913"); var point = new Proj4js.Point( 85286.417057415703, 4347668.9422677439 ); Proj4js.transform(source, dest, point); var transformation = Proj4js.transform(source, dest, point); alert(point.y + "," + point.x); I should have in return x (long) = 0.7661409 and y(lat) =36.3411771 (calculated by http://twcc.free.fr/) but with this code I have: x=0.0003264583485814848 y=0.000006882360979601046
أكثر...
So the problem is:
I don't understand why this code don't convert correctly my coordinates (exprimed in google mercator epsg:900913) to WGS84 web mercator epsg:4326:
Proj4js.defs["EPSG:4326"] = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"; Proj4js.defs["EPSG:900913"]= "+title=GoogleMercator +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs"; var dest = new Proj4js.Proj("EPSG:4326"); var source = new Proj4js.Proj("EPSG:900913"); var point = new Proj4js.Point( 85286.417057415703, 4347668.9422677439 ); Proj4js.transform(source, dest, point); var transformation = Proj4js.transform(source, dest, point); alert(point.y + "," + point.x); I should have in return x (long) = 0.7661409 and y(lat) =36.3411771 (calculated by http://twcc.free.fr/) but with this code I have: x=0.0003264583485814848 y=0.000006882360979601046
أكثر...