Oct 2, 2013 at 10:23 PM
Edited Oct 2, 2013 at 10:29 PM
I made a WMS using SharpMap, but noticed that the GetFeatureInfo call resulted in multiple records from the same layer. Upon debugging the code, I noticed that it was because of the "pixelSensitivity" parameter in the WmsServer.ParseQueryString call.
So I gave it a value of 1 and it still yielded similar results. My data are shapefiles in Geographic NAD 83 and I'm using OpenLayers.
So I decided to look at the OpenLayers example (SharpMap.Demo.Wms) in the SharpMap code that I downloaded and saw similar results there as well (I did try reducing the pixel sensitivity). I chose the area by the 4 hospitals by East River and if I clicked on
any of them it gave me 5 results (4 hospitals, plus the east river polygon).
I even edited the SharpMap code (method:CreateFeatureInfoGeoJSON, class: SharpMap.Web.Wms.WmsServer) where it makes the queryBox to look like this:
//var queryBoxMinX = x - (_pixelSensitivity);
//var queryBoxMinY = y - (_pixelSensitivity);
//var queryBoxMaxX = x + (_pixelSensitivity);
//var queryBoxMaxY = y + (_pixelSensitivity);
var queryBoxMinX = x - 0.0001f;
var queryBoxMinY = y - 0.0001f;
var queryBoxMaxX = x;
var queryBoxMaxY = y;
var minXY = map.ImageToWorld(new PointF(queryBoxMinX, queryBoxMinY));
var maxXY = map.ImageToWorld(new PointF(queryBoxMaxX, queryBoxMaxY));
I did that to reduce the queryBox as small as (0.0001f x 0.0001f) so as to reduce the intersection area. But still no luck.
I'm out of options/ideas at this point. Does any one have any ideas on how I can get the CreateFeatureInfoGeoJSON to return the right results?