[mapserver-dev] MS RFC 68: Support for combining features from multiple layers (Call for discussion)

[Lime, Steve D (DNR)]

I’ve not poured through all the subsequent discussion yet but a quick read of RFC 68 has me thinking there
are two distinct problems being addressed here:


1)      Rendering multiple layers with one layer definition.

2)      Clustering.

I see value in both but kinda think they should be handled with separate RFCs since you don’t need one for the
other and neither problem is trivial.

At least on the clustering side I don’t think that should be handled as a connection type. Rather I’d favor a new
CLUSTER block where you’d set the various tolerance and scale values. That way you could add clustering to a
point layer without much effort. I think it needs to be that simple.

Steve

From: mapserver-dev-bounces at lists.osgeo.org [mailto:mapserver-dev-bounces at lists.osgeo.org] On Behalf Of Tamas Szekeres
Sent: Thursday, February 10, 2011 4:03 PM
To: mapserver-dev at lists.osgeo.org
Subject: [mapserver-dev] MS RFC 68: Support for combining features from multiple layers (Call for discussion)

Hi Devs,

In reference to the feature request from WhereGroup<http://www.wheregroup.com/en/welcome> we did some refinement in the specification and I've created MS-RFC-68 (http://trac.osgeo.org/mapserver/browser/trunk/docs/en/development/rfc/ms-rfc-68.txt) which contains a reasonable implementation to this option without requiring significant modifications in the MapServer codebase and the current processing chain. With regards to the timing, I already have some working code in place which could be finished by the time of the feature freeze of MapServer 6.0 we are targeting now (feb. 28).

Waiting for your comments and suggestions...


Best regards,

Tamas
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