Hi
GetFeatureInfo requests against Mapserver will not be much different than
against ArcGIS WMS. Here is an example:
http://mapsvr/cgi-bin/mapserv.exe?map=mylocation&service=wms&version=1.1.1&request=GetFeatureInfo&LAYERS=synlait&QUERY_LAYERS=synlait&INFO_FORMAT=text/plain&SRS=EPSG:2193&BBOX=1492834.61,5131445.29,1493034.61,5131645.29&WIDTH=100&HEIGHT=100&x=50&y=50
For a single point, just play around with the size of the BBOX, WIDTH, HEIGHT,x
& y parameters - make as small or large as you need to ensure you get a single
point. You can also specify a TOLERANCE in your mapfile:
LAYER
NAME "synlait"
GROUP "FMS"
DATA ../data/nztm/synlait
SIZEUNITS PIXELS
STATUS ON
DUMP TRUE
# query templates for HTML-based queries
# responds to OGC:WMS request=GetFeatureInfo......&info_format=text/html
HEADER ../templates/synlait_query_header.html
TEMPLATE ../templates/synlait_query_body.html
# fuzziness for querying
TOLERANCE 5000
TOLERANCEUNITS METERS
TYPE POINT
UNITS METERS
# scale range
MAXSCALE 250000
MINSCALE 750
LABELMAXSCALE 100000
LABELMINSCALE 1
LABELCACHE on
LABELITEM 'reference_code'
CLASS
STYLE
COLOR 138 43 226
OUTLINECOLOR 0 0 0
SIZE 13
SYMBOL "triangle"
END
LABEL
TYPE truetype
FONT "arial"
SIZE 10
POSITION ur
OUTLINECOLOR 235 235 235 #--Halo
COLOR 0 0 0
BUFFER 2
END #LABEL
END #CLASS
METADATA
"wms_group_title" "FMS"
"wms_name" "synlait"
"wms_title" "synlait"
"wms_abstract" "These are Synlait farms in NZTM"
"wms_keywordlist" "AgriBase"
#"wms_server_version" "1.1.1"
"wms_srs" "EPSG:2193"
"wms_extent" "1114412.940 4793178.168 2089186.204 6190213.601"
"wms_dataurl_format" "text/HTML"
"gml_include_items" "all"
"gml_exclude_items" ""
"ows_include_items" "all"
"ows_exclude_items" ""
"wms_exceptions_format" "application/vnd.ogc.se_xml"
END
END #synlait
Note: The DATA directive contains the path and name of the Shape file.
The HEADER and TEMPLATE directives reference a couple of html files that format
the response to the GetFeatureInfo request when you request
&info_format=text/html. If you are just requesting text/plain then you will get
all of the attributes.
regards,
Robert
>>> sunny74 <[email protected]> 22/03/2010 6:28 p.m. >>>
Hi Robert,
Thanks for your reply.
There are a few doubts about the code:
1) If you taken a single lonlat and then made a bounding box(BBOX) by doing
+- 10.
But what if I want to get the feature info of just one point.What will be
the url in that case?
2) The url is "var regc =
"http://ws-esrimt/arcgis/services/mapservice_asurequality_prod/MapServer/WMSServer?service=WMS&version=1.1.1&request=GetFeatureInfo&QUERY_LAYERS=2&INFO_FORMAT=text/plain&SRS=EPSG:2193&BBOX=";
+ bbox1 + "," + bbox2 + "," + bbox3 + "," + bbox4 +
"&WIDTH=20&HEIGHT=20&X=10&Y=10";"
It seems from the url that you r using ARCGIS with Mapserver. But if I am
using
only mapserver with openlayers then what is the url?
3) HOw do I make a layers queryable in the map file? What r the extra things
I need to specify?
Pls reply soon.
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