<div class="gmail_quote">2012/5/4 Jason Roberts <span dir="ltr"><<a href="mailto:jason.roberts@duke.edu" target="_blank">jason.roberts@duke.edu</a>></span><br><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
it accepts an unlimited number of layers, performs the intersection or union<br>
of all of them, and creates one (new) output.</blockquote><div> </div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> The main obvious downside of that is having to create and manage the<br>
temporary outputs.</blockquote><div><br><br>Currently the output layer is not checked for existing features and new features are just added into it. So, it is possible to call the method for new layers re-using the same output layer. The schema should not be a problem as it is created in the first call (if it has not been set by the user) and in subsequent calls the feature attributes are set by name (doing type conversions if required and done by feature copy).<br>
<br><br></div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
Are you looking for additional tools to implement besides Symmetrical<br>
Difference? I could suggest more that are in ArcGIS that would be valuable<br>
to see in GDAL.<br></blockquote><div><br><br>Please suggest. I'm at least interested in what people use and find useful.<br><br>Ari <br></div></div><br>