[ka-Map-users] query in ka-map with mapserver

Wed Dec 23 22:49:24 EST 2009

yes, now it is a little clear. I think when I draw a box on my map, then all
the features in that box will be included in the query results. So I can
check the query fields for  what  I  want.
Is it that? However,  when  I  finished the query  the  output  results from
the file named map_query_float.php is  0,  and  I am sure  I  have
included  a  city (which  is defined  as  polygon  in  my  mapfile)  in  my
query  area?  what is  the  matter? Can you give me some ideas? Thank you
very much !

2009/12/24 Hajime TANAKA <hajime.tanaka at tufts.edu>

> s> 1、what do "fields" mean? Are they the attributes or shapes from my
> database
> > or anything else?
> Yes they are the names of the attributes in the shapefile.
> You may use Postgis as well.
>
> > 2、what is the template.html  used  for ? Does it give the query rules or
> > displaying styles?
> I don't understand very well about templates either.
> It seems necessary for Mapserver,
> http://mapserver.org/mapfile/template.html
> but as far as I use, Ka-map often works without templates.
>
> Hajime
>
> 2009/12/23 王连波 <happyforev1 at gmail.com>:
> > Think you for your quick reply, Hajime. However, I still have two
> quetions:
> > 1、what do "fields" mean? Are they the attributes or shapes from my
> database
> > or anything else?
> > 2、what is the template.html  used  for ? Does it give the query rules or
> > displaying styles?
> > thank you again, and I will read the resources you give me here.
> >
> > 2009/12/23 Hajime TANAKA <hajime.tanaka at tufts.edu>
> >>
> >> Hi,
> >>
> >> according to
> >> http://ka-map.ominiverdi.org/wiki/index.php/Query
> >>
> http://ka-map.ominiverdi.org/wiki/index.php/Mapfile_Metadata_Configuration
> >> you need
> >>
> >> METADATA
> >>  "queryable" "true"
> >>  "fields" "A:alias_A, B:alias_B, C:alias_C" # the selected fields
> >> will be displayed on the left panel with alias names
> >> END
> >>
> >> in a layer. and you also need to make template.html for the layer
> >>
> >> #---------------template.html-----------------#
> >> <!-- MapServer Template -->
> >> <html>
> >>  <head><title>Global Template</title></head>
> >>  <body>
> >>       <li> [A]
> >>       <li> [B]
> >>       <li> [C]
> >>  </body>
> >> </html>
> >> #---------------template.html end---------------#
> >>
> >> and, put TEMPLATE in CLASS
> >>
> >> CLASS
> >> # skip #
> >>  TEMPLATE template.html
> >> # skip #
> >> END
> >>
> >> I remember <!-- Mapserver Template--> is necessary.
> >>
> >> 2. You need to entirely include the polygon with the rectangle
> >>
> >> 3. My understanding is that when query is successful, MS_SUCCESS will
> >> be returned as the value of 1
> >> http://mapserver.org/mapscript/php/index.html
> >> map_query_float.php, first getResult($a) should be changed to
> >> getResult(0) for multiple layer queries.
> >> http://lists.maptools.org/pipermail/ka-map-users/2007-June/003026.html
> >>
> >> I hope this helps,
> >>
> >> Hajime
> >>
> >> 2009/12/23 王连波 <happyforev1 at gmail.com>:
> >> > hello all,
> >> >
> >> >  I want to query something from my map which is displayed through
> ka-map
> >> > from mapserver. However, the problem is I am not clear about how to
> use
> >> > query. Should I add QUERYMAP in my mapfile, or what is ITEMQUERY mean?
> I
> >> > have read the MapServer docs, but it is too little for me to
> understand.
> >> > Is
> >> > there some examples or resources for me, thank you in advance.
> >> >  BTW, in ka-map there is a file named map_query_float.php. I read it
> and
> >> > got
> >> > something, but I am not clear about that:
> >> > 1、the "fields" I should add into my mapfile mean what?  Is it the
> >> > queried
> >> > shape's attributes from the table where I store the shapes in my
> >> > database,
> >> > or something  else?
> >> > 2、If I want to query something (eg. population) of a city in a state,
> >> > while
> >> > I just draw a box to select part of the city, can I get that city's
> >> > population or that just the cities which are totally selected in the
> box
> >> > can
> >> > be queried? I hope someone can understand me and give me some hints.
> >> > 3、this is a simple question: why I can not get the "if" sentences
> >> > executed
> >> > with "if ($check_query == MS_SUCCESS)" , while it is ok with "if
> >> > ($check_query == 1)"? (I had loaded PHP/MapScript module in my PHP
> >> > script
> >> > file.)
> >> >
> >> > Any help is appreciated.
> >> >
> >> > --
> >> > 天道酬勤
> >> >
> >> > _______________________________________________
> >> > ka-Map-users mailing list
> >> > ka-Map-users at lists.maptools.org
> >> > http://lists.maptools.org/mailman/listinfo/ka-map-users
> >> >
> >> >
> >>
> >>
> >>
> >> --
> >> Hajime Tanaka
> >> _______________________________________________
> >> ka-Map-users mailing list
> >> ka-Map-users at lists.maptools.org
> >> http://lists.maptools.org/mailman/listinfo/ka-map-users
> >
> >
> >
> > --
> > 天道酬勤
> >
>
>
>
> --
> Hajime Tanaka
> _______________________________________________
> ka-Map-users mailing list
> ka-Map-users at lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/ka-map-users
>

-- 
天道酬勤
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.maptools.org/pipermail/ka-map-users/attachments/20091224/72ce5145/attachment-0001.htm 