[OpenLayers-Users] What is the proj4 definition for projection EPSG:3408, Proj4js.defs["EPSG:3408"]=?

[stephane.poirier at usherbrooke.ca]

Hi All,

Do draw a lat lon grid over map, I am using the graticule_v2-patch.js presented recently on http://trac.openlayers.org/attachment/ticket/1083/graticule_v2.patch

It works fine for projection EPSG:42304 when using Proj4js.defs definition from http://spatial-reference.org/ref/sr-org/113/proj4js/ Proj4js.defs["EPSG:42304"]="+title=Atlas of Canada, LCC +proj=lcc +lat_1=49 +lat_2=77 +lat_0=49 +lon_0=-95 +x_0=0 +y_0=0 +ellps=GRS80 +datum=NAD83 +units=m +no_defs";    

It works fine for projection EPSG:3573 when using Proj4js.defs definition from  http://spatial-reference.org/ref/epsg/3573/proj4js/ Proj4js.defs["EPSG:3573"] = "+proj=laea +lat_0=90 +lon_0=-100 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs";

Now that graticule_v2.patch does not draw the lat lon grid properly for projection EPSG:3408 when using Proj4js.defs definition from http://spatial-reference.org/ref/epsg/3408/proj4js/ (NSIDC's EASE Grid Northern Hemisphere) Proj4js.defs["EPSG:3408"]="+proj=laea +lat_0=90 +lon_0=0 +x_0=0 +y_0=0 +a=6371228 +b=6371228 +units=m +no_defs";

This later Proj4js.def definition does not define the same parameters. Is there some missing field in this later definition? Or is it the graticule_v2.patch that does not support drawing in this EPSG:3408 projection?


Stephane Poirier - Research professional
Center of Applications in Remote Sensing
Applied Geomatics Department
University of Sherbrooke
Sherbrooke (Quebec), CANADA J1K 2R1
Tel.: (+1 819) 821 8000 #61904
Fax.: (+1 819) 821 7944
Stephane.Poirier at USherbrooke.ca
http://www.usherbrooke.ca/cartel

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