I might save that for showing to a few people.
For the curious, I live near where the dot on the "i" in "Engadine" is on that map. Unfortunately, the map doesn't show all undeveloped bushland, as there's a a fair sprinkling near me.
That one over near Turramurra looks suspicious, doesn't it? Strange how none of the news reports have speculated on it's origin...
Wade.