// look for it in the local cache. If it's not there, then go
// to the DTEDFrameCache.
String key = new String(lat + ":" + lon + ":" + level);
CacheObject ret = searchCache(key);
if (ret != null) {
if (Debug.debugging("dted")) {
Debug.output("DTEDFrameCacheHandler.get(): retrieving frame from cache ("
+ lat + ":" + lon + ":" + level + ")");
}