All, I have the same problem with getfeatureinfo on line data using MapGuide Open Source WMS and OpenLayers. I think it's a bug in MapGuide. Polygon queries work OK.
----- Original Message ----- From: Marc Desharnais To: [email protected] Sent: Friday, July 20, 2007 9:21 AM Subject: Re: [OpenLayers-Users] Hard to click on points for GetFeatureInfo Hi all, For the record, I asked the geoserver team and it seems that no such options exists for now. The problem is that for now they do a getinfo on the coordonates of the geometry (a point in my case) instead of the representation (likely a circle for me). The representation is larger than the geometry so you get the feeling you can click anywhere in the cercle to get info. By reality is really different ;) This issue is opened in their bug base so I guess it will be fixed in the next versions. Regards, Marc Dmitri Mizerkin wrote: Mi Marc, so you have to request feature from the server, not feature info. A click event on a map returns the values for x and y in the view port. You should make a box of those adding and substracting a custom tolerance value. After you've done so you got 4 values: minx = x - tolerance, miny = y - tolerance, maxx = x + tolerance, maxy = y + tolerance. These can be converted to latitude-longitude values using OpenLayers ( map.getLonLatFromViewPortPx function). After all of these actions you get your BBOX so you can send a request to the geoserver like this: http://your_host/geoserver/wfs?REQUEST=GetFeature&SERVICE=WFS&VERSION=1.0.0&TYPENAME=your_layer_names&BBOX=your_bbox&MAXFEATURES=10 That's the only workaround I know. Cheers, Dmitri 2007/7/20, Marc Desharnais <[EMAIL PROTECTED]>: Hi all, I'm using geoserver so I guess your solution won't work. Anyone has an idea about setting a tolerance level in geoserver? Or anything that would make it easier to click on a point of a map with geoserver. Thanks, Marc Dmitri Mizerkin wrote: > Hi Bill, > > that's the right way to do it. What I meant is setting the tolerance > via URL, in your case it would be sth like > http://youhost/...&map_layer_0_tolerance=1&map_layer_0_toleranceunits=feet > < http://youhost/...&map_layer_0_tolerance=1&map_layer_0_toleranceunits=feet> > (I don't know if the underscores in your layer name won't affect the > functionality so I'm assuming that it is the first layer in the > mapfile and using the index of it). More information can be found on > http://mapserver.gis.umn.edu/docs/reference/cgi/controls in the very > last chapter "Changing map file parameters via a form or a URL ". > > Hopefully it helps Marc with his issue. > > Regards, > Dmitri > > 2007/7/20, Bill Woodall < [EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>>: > > Hi All > > What has worked for me in using TOLERANCE is to put it into the > mapfile > ( if you are using MapServer) like ; > > LAYER > NAME Scrub_and_Chaparral > TEMPLATE blank > TOLERANCE 1 > TOLERANCEUNITS feet > METADATA > "wms_title" "Scrub_and_Chaparral" > "wms_include_items" "CATEGORY,LEGEND,SOURCE" > END > TYPE POLYGON > STATUS ON > DATA Scrub_and_Chaparral > > ......Bill, > > On Thu, 2007-07-19 at 20:08 +0200, Dmitri Mizerkin wrote: > > Hi Marc, > > > > in a WMS/WFS service request the attribute you are looking for is > > called TOLERANCE. I think this should do it when set as a > parameter in > > getFullRequestString function (see user recipies: > > http://trac.openlayers.org/wiki/GetFeatureInfo). > > > > Hopefully it helps you out. > > > > Cheers, > > Dmitri > > > > 2007/7/19, Marc Desharnais < [EMAIL PROTECTED] > <mailto: [EMAIL PROTECTED]>>: > > Hi all, > > > > I search for an attribute to set to make it easier to > click on > > points to > > get some info about them. > > I tried some things like RADIUS or REDIUS (saw that on a > page > > on > > internet) but nothing works. > > > > I just want it to be easier to click on the point if it's > > possible, a > > couple of pixels more. > > > > > > Thank in advance, > > > > Marc > > _______________________________________________ > > Users mailing list > > [email protected] <mailto:[email protected]> > > http://openlayers.org/mailman/listinfo/users > > _______________________________________________ > > Users mailing list > > [email protected] <mailto:[email protected]> > > http://openlayers.org/mailman/listinfo/users > ------------------------------------------------------------------------------ _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
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