+ + Math.abs(_longitude);
+ }
+
+ public SrtmSource findBestCachedSource()
+ {
+ SrtmSource[] sources = {new SrtmGl1Source(),
+ new Srtm3Source() };
+ for (int i = 0; i < sources.length; i++)
+ {
+ if (sources[i].isCached(this))
+ {
+ return sources[i];
+ }
+ }
+ return null;