It should be something like: +proj=stere +lat_0=90 +lat_ts=60 +lon_0=263 +k=??? +x_0=3450000 +y_0=7450000 +ellps=WGS84 +datum=WGS84 +units=m
I'm not positive about the lon_0 param, and the k param is a ratio of resolution at standard parallel to another resolution value but I'm not sure what that other value is. To test to see if the above works, set k=1.0 and we can look up what the correct value for K should be. Mike Adair [email protected] wrote: > Hi All, > > How to define a custom Proj4js.def["myown"] when it is not in > http://spatialreference.org/ref > but when I have the following projection parameters? > > lon_0?? > > polar_stereographic:straight_vertical_longitude_from_pole = 263.f ; > lat_ts > polar_stereographic:standard_parallel = 60.f ; > x_0 > polar_stereographic:false_easting = 3450000.f ; > y_0 > polar_stereographic:false_northing = 7450000.f ; > lat_0 > polar_stereographic:latitude_of_projection_origin = > 90.f ; > proj=stere > polar_stereographic:grid_mapping_name = > "polar_stereographic" ; > > > polar_stereographic:resolution_at_standard_parallel = 50000.f ; > > For example, using > http://spatialreference.org/ref/epsg/32661/proj4js/ for universal > polar stereographic (which is usefull when used for area above the 60 > degrees north ), I get Proj4js.defs["EPSG:32661"] = "+proj=stere > +lat_0=90 +lat_ts=90 +lon_0=0 +k=0.994 +x_0=2000000 +y_0=2000000 > +ellps=WGS84 +datum=WGS84 +units=m +no_defs"; > > Regards, > > Stephane > > > Stephane Poirier, M.Sc. Optics Physics > Remote Sensing Research Professional > University of Sherbrooke, QC, Canada > [email protected] <mailto:[email protected]> > http://www.usherbrooke.ca/cartel > ------------------------------------------------------------------------ > > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users > -- Michael Adair Senior Software Architect DM Solutions Group Inc. Office: (613) 565-5056 x26 [email protected] http://www.dmsolutions.ca http://research.dmsolutions.ca _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
