Hi.<br><br><div class="gmail_quote">2009/6/9 James Livingston <span dir="ltr"><<a href="mailto:doctau@mac.com">doctau@mac.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div style=""><br><div>To use the river/streams example from above, I'd say that if you have the chance to _accurately_ trace a waterway, it might be worth doing before most of the things. Other people who come along later will be able to get the roads, but they may not have a boat to go down the river on.</div>
<div><br></div><br></div></blockquote></div><br>Tracing most waterways accurately when all you have is Landsat is pretty difficult IMHO. Fortunately a lot of waterways form boundaries for town/suburbs, so some of the ABS data traces waterways.<br>
<br> - Ben.<br><br>