// snow cover
map<string, SGMetarRunway> rm = getRunways();
- map<string, SGMetarRunway>::iterator runway;
+ map<string, SGMetarRunway>::const_iterator runway;
for (runway = rm.begin(); runway != rm.end(); runway++) {
SGMetarRunway rwy = runway->second;
if (rwy.getDeposit() >= 3 ) {