Hi<br><br>We use the back end CGI extensively and it is extremely fast. It is simply a case of being able to define what type of constraint you want against each layer (tolerance etc) - I'm normally surprised if mapserver takes more than a second or two to query up to 20-30 individual layers...<br>
<br>Hope this reassures!<br><br>Mike<br><br><div class="gmail_quote">2009/9/1 Chris Kantarjiev <span dir="ltr"><<a href="mailto:cak@speedgauge.net">cak@speedgauge.net</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;">
Sure. The basic use case is:<br>
<br>
User navigates to a particular, known, lat/lon as starting point; this can be by entering the known lat/lon values, or by navigation around cities.<br>
<br>
User then selects one or more links and can inspect attributes associated with those links - in particular, link_id and direction. Initial selection could be by sweeping out an area, but should also provide a way of adding/removing specific links from the selection (control-select).<br>
<br>
Did that makes sense?<br><font color="#888888">
<br>
chris</font><div><div></div><div class="h5"><br>
<br>
Steve Lime wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
You'd be surprised with what you can do with the CGI backend. It's certainly possible, with the right<br>
web client (e.g. something like GeoMoose or OpenLayers) to craft queries against the CGI to select<br>
one or many features from one or many layers using a point, box or arbitrary geometry. Perhaps if<br>
you could sketch out a use case or two...<br>
<br>
Steve<br>
<br>
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On 9/1/2009 at 12:49 PM, in message <<a href="mailto:4A9D5E9D.9000701@speedgauge.net" target="_blank">4A9D5E9D.9000701@speedgauge.net</a>>, Chris<br>
</blockquote></blockquote></blockquote>
Kantarjiev <<a href="mailto:cak@speedgauge.net" target="_blank">cak@speedgauge.net</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I'm just starting to play with query mode and find it very useful. I have an interaction style in mind that would let me select and highlight several (possibly connected) links in a layer in a fairly interactive style (more like one would do with ArcGIS, I guess). I'm pretty sure that I won't be successful doing this with the basic CGI, and am overwhelmed by the number of Ajax layers that I might choose from.<br>
<br>
Are there documents/pages out there that might give me some guidance about what's possible with the various packages?<br>
<br>
Thanks,<br>
chris<br>
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