I hit send preamtureley!<br><br>Second question is - would it be better to have the layer in PostGIS? If so I'm not sure on how to query two layers agaisnt each other (unless like a SLAYER query)<br><br>Any thoughts would be greatly appreciated.<br>
<br>Kind regards<br>Mike<br><br><br><div><span class="gmail_quote">On 30/01/2008, <b class="gmail_sendername">Mike Saunt</b> <<a href="mailto:mikesaunt@gmail.com">mikesaunt@gmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi All<br><br>I've got a requirement to be able to 'select' multiple features and then perform a query against them to find features from other layers that intersect. The goal is for an interactive tool to select polygons which will be highlighted on every map redraw (using itemnquery) and when the user chooses to have a feature query (itemfeaturequery) against them all.<br>
<br>Our issue is that our selectable layer could have in excess of 1.5 million features and the speed for each map refresh / feature qwould be too long. We're testing agaisnt MapInfo TAB but can have the layer in Shape or PostGIS.<br>
<br>Questions therefore are:<br>Can we have an attribute index built against the field for the layer somehow that MapServer can read and therefore become ALOT faster?<br><br><br><br>
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