What happened to all the lakes and rivers in Canada???
OK… Sorry about this, folks. In the third generation scenery, most of Canada (and the northern US above 45 degrees latitude) is a desert. It appears the vector shoreline data was missing when this area of scenery was generated. The root cause is that the source data from NIMA (the US National Imaging and Mapping Agency) is corrupt in this area. The GloS folks contacted NIMA but got nowhere. In the fourth generation scenery, lakes in Canada have been restored from an alternate, but less accurate, data source.