Cesium-Examples/libs/iclient8c/examples/js/proj4js/lib/defs/EPSG41001.js

Proj4js.defs["EPSG:41001"] = "+title=simple mercator EPSG:41001 +proj=merc +lat_ts=0 +lon_0=0 +k=1.000000 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m";