I'm trying to overlay shape files(world map) to google map, I found
that google map is using this PROJCS.
54004,PROJCS["World_Mercator",GEOGCS["GCS_WGS_1984",DATUM["WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Mercator_1SP"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",0],PARAMETER["Standard_Parallel_1",0]
,UNIT["Meter",1]
,AUTHORITY["EPSG","54004"]]
I can get the same shape of google map(in world range, the top most
level of google map), but one mismatch is the unit, the unit google
map used is Decimal Degree, while Mercator Projection using is Meter,
when I change this to
54005,PROJCS["World_MercatorDD",GEOGCS["GCS_WGS_1984",DATUM["WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Mercator_1SP"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",0],PARAMETER["Standard_Parallel_1",0]
,UNIT["Degree",0.0174532925199433]
,AUTHORITY["EPSG","54005"]]
Still I can not get the same coordinate value as google map, can
anybody help? can I using the same unit with google map in Mercator
projection result