Variable EPSG_6893`Const`

EPSG_6893: "+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +vunits=m +no_defs +type=crs" = '+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +vunits=m +no_defs +type=crs'

WGS 84 / World Mercator + EGM2008 height