queryBypoint problem - Please help

[Nagu Govind]

Hi Ruggero,

Thanks for your reply.

I added the MetaData Key word in layer as follows.
METADATA
  "DESCRIPTION" "My layer ind"
  "RESULT_FIELDS" "DISTRICT STATE"
END
 But I still get the same warning "Warning: [MapServer
Error]: msQueryByPoint(): No matching record(s)
found".
I change the Lat and Lon and checked but there is no
change.

Please tell me Where Iam going wrong?. Is there any
thing else i have to check.

Regards
Nagu



--- Ruggero Valentinotti <valruggero at libero.it> wrote:

> Nagu Govind wrote:
>
> > Hi,
> > Iam using MapScript.
> > I want to find out the State and District name
> using latiudes and
> > longitudes. My .dbf file has the following fields
> > 1.Dst_ID
> > 2.District
> > 3. State
> >
> > I want to get this info corresponding to my lat
> and long.
> >
> > My map file layer is like this
> > ---------------------
> > MAP
> >  NAME "ind"
> >  SIZE 500 500
> >  STATUS ON
> >  SYMBOLSET "maps/symbols/examples.sym"
> >  EXTENT 67 5 99 40
> >
> >  SHAPEPATH "maps/data/"
> >
> >     PROJECTION
> >   "proj=latlong"
> >   "datum=NAD83"
> >     END
> >
> >  WEB
> >   IMAGEPATH "maps/tmp/"
> >   IMAGEURL "maps/ <http://nagaraj:9000/maps/tmp/>"
> >   TEMPLATE  'maps/myind.html'
> >  END
> >
> > QUERYMAP
> >   STATUS ON
> >   STYLE SELECTED
> >   COLOR 255 255 0
> >  END
> >
> >  LAYER
> >   NAME "Ind"
> >   TYPE POLYGON
> >   STATUS ON
> >   DATA "ind_ds"
> >   PROJECTION
> >    "proj=latlong"
> >    "ellps=GRS80"
> >   END
> >   CLASS
> >    NAME "IND MAP"
> >    OUTLINECOLOR 0 0 0
> >    COLOR 255 255 0
> >    SYMBOL dash-long
> >    STATUS ON
> >   END
> >   TEMPLATE ind_query.html
> >  END
> >
> > END
> > -----------------------
> >
> > And Iam calling Query by point as folows
> >
> > $point = ms_newpointObj();
> > $point->setXY($lon,$lat);
> > $layer1 = $map->getLayerByName('Ind');
> > if($layer1->queryBypoint($point,MS_SINGLE,$buffer)
> == MS_SUCCESS){
> >  echo "Success : $buffer";
> > }
> >
> > Iam getting this warning message
> > Warning: [MapServer Error]: msQueryByPoint(): No
> matching record(s)
> > found.
> >
> > Iam new to mapserver & I really dont know whether
> this is the right
> > method to get the info from the dbf file. Iam
> having only one polygon
> > layer. Do i need to have another layer for
> quering.?.
> > Please tell me where Iam going wrong.
> >
> > The concepts of layers are also not much clear to
> me. Regarding
> > Mapscript and Map File , reference documents are
> there but I could not
> > find any elaborate examples or application notes.
> >  Please tell me where i can find them.
> >
> > I also could not find any good samples similar to
> my requirement.
> >
> > Some one please help me.
> >
> > Regards
> > vdharan
> >
> >
> >
> >
>
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>
> Hi Nagu,
> you need METADATA keyword in Layer class:
>
>  LAYER
>   NAME "Ind"
>   TYPE POLYGON
>   STATUS ON
>   METADATA
>     "DESCRIPTION" "My layer ind"
>     "RESULT_FIELDS" "DISTRICT STATE"
>   END
>   DATA "ind_ds"
>   PROJECTION
>    "proj=latlong"
>    "ellps=GRS80"
>   END
>   CLASS
>    NAME "IND MAP"
>    OUTLINECOLOR 0 0 0
>    COLOR 255 255 0
>    SYMBOL dash-long
>    STATUS ON
>   END
>   TEMPLATE ind_query.html
>  END
>
>
> And then use Use '@' to avoid warning if query found
> nothing
>
> @$layer1->queryBypoint($point,MS_SINGLE,$buffer);
>
>
> Hope this help
>
> ruggero
>
>
>
>
> --
>
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>
>        /\              Ruggero Valentinotti
>
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>
>   _____||___||_____    E-mail: valruggero at libero.it
>
>




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