Extends proj4js to handle Mars projections and transformation between them.

• GCJ02
  • GCJ02, +proj=longlat +datum=GCJ02
  • GCJ02MC, +proj=merc +datum=GCJ02
• BD09
  • BD09LL, +proj=longlat +datum=BD09
  • BD09MC, +proj=bmerc +datum=BD09

• EPSG:3857, +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 +wktext +no_defs
• EPSG:4326, +proj=longlat +datum=WGS84 +no_defs

MIT © wsw0108, see LICENSE file