public boolean isValid() {
        return isValidLatitude(getLatitude()) && isValidLongitude(getLongitude());
    }
Check whether a geopoint built from user supplied data is valid. We accept both N90/S90 and E180/W180.

@return <tt>true</tt> if the geopoint looks valid, <tt>false</tt> otherwise
main/src/main/java/cgeo/geocaching/location/Geopoint.java