Thanks to Hamish and Markus Metz,
What I am doing is comparing two or three (possibly four) types of
megaliths in my study area and trying to understand the relation ship
between both contemporary monuments and later monuments. While I was
looking at old GIS maps, I was looking at the stream and basin maps
and had overlaid the monuments on these maps.
First off, the vector river and stream maps, representing the current
water ways are a bit different then the stream map. The physical
streams do seem to follow the stream maps, but there are many more
branches on the stream map than there are actual streams.
Some of the megalithic tombs types seem to fall into the web of the
streams, while others don’t. I think this is important. I am,
unfortunately, an archaeologist, not a hydrologist, so I am not up on
watershed lingo.
What I need to know is what information on these maps may tell me
something important. For example, are the stream systems shown on the
watershed stream maps just important of them selves, or might the
values the colors represent tell me something? Is there a way to
isolate them?
I guess what I am hoping for is a hydrologist who uses grass and can
explain what I am looking at in the real world.
Kurt Springs_______________________________________________
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