[mapserver-users] mapscript and queries

[Rodrigo Becke Cabral]

Okay, I believe I've narrowed down my question:

Steve's reply:
(1) "Once the query is done..."
(2) "you can quickly step through all the layer query results generating a
global extent"

And also considering this reply:
http://mapserver.gis.umn.edu/majordom_lists/archives/mapserver-users/html/01
11/msg00182.html
(which also suits my case, let's consider I want to query/highlight/show
"Aitkin" in the map)

In (1) my question is: how do I set the query argument in mapscript? I can
think of several solutions using classitem and expressions, but still I
wouldn't be performing an actual query. Using queryByPoint or other
queryBy... methods, I still don't have a "queryItem( itemstring )" method in
layerObj, which sounds better for me.

In (2), if a queryItem method is implemented, it could also set map extents
automatically. However, if I choose to step through query results, how do I
do that? Where the query results are stored in mapscript?

Regards,
Rod.

----- Original Message -----
From: "Stephen Lime" <steve.lime at dnr.state.mn.us>
To: <cabral at cttmar.univali.br>
Sent: Tuesday, November 20, 2001 3:30 AM
Subject: Re: [mapserver-users] mapscript and queries


Well, all of the the CGI query options are recreatable under MapScript. Once
the query is done you can quickly step through all the layer query results
generating a global extent. Then you just use the drawQueryMap method to
leverage the query results in building a map.

let me know if you want specifics...

Steve

Stephen Lime
Data & Applications Manager

Minnesota DNR
500 Lafayette Road
St. Paul, MN 55155
651-297-2937
>>> ""Rodrigo B. Cabral"" <cabral at cttmar.univali.br> 11/19/01 15:46 PM >>>
Hi,

How queries can be handled with mapscript? By that I mean: when the user
selects an item (e.g. name of the shape), I want the map object to highlight
it
and to set the map extents to enclose the shape.

Thanks,
Rod.