Hi all<br><br>In essence this is what I'm trying to achieve but I'm trying to work out the best way of doing it - I want to use the CGI as it is powerful, very stable and extremley fast. I've had great success with MapServer before where it can perform
queries against tens of layers in under 2 seconds when having one
feature to select against.<br><br>Here is the problem...<br><br>I want a user to be able to interactively from multiple clicks on a map to select features and then they can issue a query taking all selected features and doing feature intersect queries against multiple other layers. Pretty simple!
<br><br>I'm fine with writing wrapper code to allow the user to select a feature at a point - MODE=QUERY - and then find and store the feature id's for subsequent calls to the CGI<br><br>Is there a way to be able to pass multiple feature id's to MapServer to highlight as selected in a maps? Then in the same fashion can I pass multiple feature id's (acting as the selection again) to then be used in a NQUERY to find which features from other layers intersect.
<br><br>Should I be looking at using a QUERYFILE? Is this possible - I'm sure it is as everything else I've wanted to do the CGI seems to be able to do it!<br><br>Thanks in advance<br>Mike<br><br><br><br><br><br>