private static IEnumerable <GeoJSON> QueryData(BoundingBox bbox, ICanQueryLayer layer)
{
if (layer == null)
{
throw new ArgumentNullException("layer");
}
// Query for data
FeatureDataSet ds = new FeatureDataSet();
layer.ExecuteIntersectionQuery(bbox, ds);
IEnumerable <GeoJSON> data = GeoJSONHelper.GetData(ds);
// Reproject geometries if needed
IMathTransform transform = null;
if (layer is VectorLayer)
{
ICoordinateTransformation transformation = (layer as VectorLayer).CoordinateTransformation;
transform = transformation == null ? null : transformation.MathTransform;
}
if (transform != null)
{
GeometryFactory gf = new GeometryFactory();
data = data.Select(d =>
{
Geometry converted = GeometryTransform.TransformGeometry(d.Geometry, transform, gf);
d.SetGeometry(converted);
return(d);
});
}
return(data);
}
protected override AbstractGetFeatureInfoResponse CreateFeatureInfo(Map map,
IEnumerable <string> requestedLayers,
float x, float y,
int featureCount,
string cqlFilter,
int pixelSensitivity,
WmsServer.InterSectDelegate intersectDelegate)
{
List <GeoJSON> items = new List <GeoJSON>();
foreach (string requestLayer in requestedLayers)
{
ICanQueryLayer queryLayer = GetQueryLayer(map, requestLayer);
FeatureDataSet fds;
if (!TryGetData(map, x, y, pixelSensitivity, intersectDelegate, queryLayer, cqlFilter, out fds))
{
continue;
}
IEnumerable <GeoJSON> data = GeoJSONHelper.GetData(fds);
// reproject geometries if needed
IMathTransform transform = null;
if (queryLayer is VectorLayer)
{
ICoordinateTransformation transformation = (queryLayer as VectorLayer).CoordinateTransformation;
if (transformation != null)
{
transform = transformation.MathTransform;
}
}
if (transform != null)
{
#if DotSpatialProjections
throw new NotImplementedException();
#else
data = data.Select(d =>
{
IGeometry converted = GeometryTransform.TransformGeometry(d.Geometry, transform, map.Factory);
d.SetGeometry(converted);
return(d);
});
#endif
}
items.AddRange(data);
}
StringWriter sb = new StringWriter();
GeoJSONWriter.Write(items, sb);
return(new GetFeatureInfoResponseJson(sb.ToString()));
}
public JsonResult GetData(string layer, int z, int x, int y)
{
if (String.IsNullOrEmpty(layer))
{
throw new ArgumentNullException("layer");
}
Map map = ShapefileHelper.Spherical();
IQueryable <VectorLayer> coll = map.Layers
.AsQueryable()
.OfType <VectorLayer>()
.Where(l => l.Enabled && l.IsQueryEnabled)
.Where(l => String.Equals(l.LayerName, layer));
VectorLayer query = coll.SingleOrDefault();
if (query == null)
{
throw new ArgumentException("Layer not found: " + layer);
}
if (query.SRID != 4326)
{
throw new ArgumentException("Only EPSG:4326 supported");
}
using (Utf8Grid grid = new Utf8Grid(UtfGridResolution, x, y, z))
{
Envelope bbox = this.GetBoundingBoxInLatLngWithMargin(x, y, z);
var ds = new FeatureCollectionSet();
query.ExecuteIntersectionQuery(bbox, ds);
IEnumerable <GeoJSON> data = GeoJSONHelper.GetData(ds);
int i = 1;
foreach (GeoJSON val in data)
{
IGeometry geom = val.Geometry;
IDictionary <string, object> dict = val.Values;
grid.FillPolygon(geom, i, dict);
i = i + 1;
}
Utf8GridResults results = grid.CreateUtfGridJson();
return(this.Json(new { keys = results.Keys, data = results.Data, grid = results.Grid, }, JsonRequestBehavior.AllowGet));
}
}
private IEnumerable <GeoJSON> GetData(Map map, BoundingBox bbox)
{
List <GeoJSON> items = new List <GeoJSON>();
// Only queryable data!
IQueryable <ICanQueryLayer> collection = map.Layers
.AsQueryable()
.OfType <ICanQueryLayer>()
.Where(l => l.Enabled && l.IsQueryEnabled);
foreach (ICanQueryLayer layer in collection)
{
// Query for data
FeatureDataSet ds = new FeatureDataSet();
layer.ExecuteIntersectionQuery(bbox, ds);
IEnumerable <GeoJSON> data = GeoJSONHelper.GetData(ds);
// Reproject geometries if needed
IMathTransform transform = null;
if (layer is VectorLayer)
{
ICoordinateTransformation transformation = (layer as VectorLayer).CoordinateTransformation;
transform = transformation == null ? null : transformation.MathTransform;
}
if (transform != null)
{
data = data.Select(d =>
{
Geometry converted = GeometryTransform.TransformGeometry(d.Geometry, transform);
d.SetGeometry(converted);
return(d);
});
}
items.AddRange(data);
}
return(items);
}
public override void Handle()
{
string queryLayers = this.context.Request.Params["LAYERS"];
string styles = this.context.Request.Params["STYLES"];
string crs = this.context.Request.Params["CRS"];
string queryBBOX = this.context.Request.Params["BBOX"];
string queryWidth = this.context.Request.Params["WIDTH"];
string queryHeight = this.context.Request.Params["HEIGHT"];
string format = this.context.Request.Params["FORMAT"];
string transparent = this.context.Request.Params["TRANSPARENT"];
string background = this.context.Request.Params["BGCOLOR"];
if (queryLayers == null)
{
WmsException.ThrowWmsException("Required parameter LAYERS not specified");
return;
}
if (styles == null)
{
WmsException.ThrowWmsException("Required parameter STYLES not specified");
return;
}
if (crs == null)
{
WmsException.ThrowWmsException("Required parameter CRS not specified");
return;
}
if (!this.Check(String.Format("EPSG:{0}", this.map.Layers[0].SRID), crs))
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidCRS, "CRS not supported");
return;
}
if (queryBBOX == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter BBOX not specified");
return;
}
if (queryWidth == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter WIDTH not specified");
return;
}
if (queryHeight == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter HEIGHT not specified");
return;
}
if (format == null)
{
WmsException.ThrowWmsException("Required parameter FORMAT not specified");
return;
}
//Set background color of map
if (!this.Check("TRUE", transparent))
{
if (background != null)
{
try { this.map.BackColor = ColorTranslator.FromHtml(background); }
catch
{
WmsException.ThrowWmsException("Invalid parameter BGCOLOR");
return;
}
}
else
{
this.map.BackColor = Color.White;
}
}
else
{
this.map.BackColor = Color.Transparent;
}
//Parse map size
int width;
if (!Int32.TryParse(queryWidth, out width))
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Invalid parameter WIDTH");
return;
}
if (this.description.MaxWidth > 0 && width > this.description.MaxWidth)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported,
"Parameter WIDTH too large");
return;
}
int height;
if (!Int32.TryParse(queryHeight, out height))
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Invalid parameter HEIGHT");
return;
}
if (this.description.MaxHeight > 0 && height > this.description.MaxHeight)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported,
"Parameter HEIGHT too large");
return;
}
this.map.Size = new Size(width, height);
BoundingBox bbox = this.ParseBBOX(queryBBOX);
if (bbox == null)
{
WmsException.ThrowWmsException("Invalid parameter BBOX");
return;
}
this.map.PixelAspectRatio = (width / (double)height) / (bbox.Width / bbox.Height);
this.map.Center = bbox.GetCentroid();
this.map.Zoom = bbox.Width;
//Set layers on/off
if (!String.IsNullOrEmpty(queryLayers))
//If LAYERS is empty, use default layer on/off settings
{
string[] layers = queryLayers.Split(new[] { ',' });
if (this.description.LayerLimit > 0)
{
if (layers.Length == 0 &&
this.map.Layers.Count > this.description.LayerLimit ||
layers.Length > this.description.LayerLimit)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported,
"Too many layers requested");
return;
}
}
foreach (ILayer layer in this.map.Layers)
{
layer.Enabled = false;
}
foreach (string layer in layers)
{
ILayer lay = this.map.GetLayerByName(layer);
if (lay == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.LayerNotDefined,
String.Format("Unknown layer '{0}'", layer));
return;
}
lay.Enabled = true;
}
}
bool json = this.Check("text/json", format);
if (json)
{
List <GeoJSON> items = new List <GeoJSON>();
//Only queryable data!
IQueryable <ICanQueryLayer> collection = this.map.Layers.AsQueryable()
.OfType <ICanQueryLayer>().Where(l => l.Enabled && l.IsQueryEnabled);
foreach (ICanQueryLayer layer in collection)
{
//Query for data
FeatureDataSet ds = new FeatureDataSet();
layer.ExecuteIntersectionQuery(bbox, ds);
IEnumerable <GeoJSON> data = GeoJSONHelper.GetData(ds);
//Filter only visible items
//double f = bbox.GetArea() / (width * height);
//data = data.Where(i =>
//{
// Geometry g = i.Geometry;
// BoundingBox p = g.GetBoundingBox();
// double area = p.GetArea();
// return area == 0 || area > f;
//});
//Reproject geometries if needed
IMathTransform transform = null;
if (layer is VectorLayer)
{
ICoordinateTransformation transformation = (layer as VectorLayer).CoordinateTransformation;
transform = transformation == null ? null : transformation.MathTransform;
}
if (transform != null)
{
data = data.Select(d =>
{
Geometry converted = GeometryTransform.TransformGeometry(d.Geometry, transform);
d.SetGeometry(converted);
return(d);
});
}
items.AddRange(data);
}
StringWriter writer = new StringWriter();
GeoJSONWriter.Write(items, writer);
string buffer = writer.ToString();
this.context.Response.Clear();
this.context.Response.ContentType = "text/json";
this.context.Response.BufferOutput = true;
this.context.Response.Write(buffer);
this.context.Response.End();
}
else
{
//Get the image format requested
ImageCodecInfo imageEncoder = this.GetEncoderInfo(format);
if (imageEncoder == null)
{
WmsException.ThrowWmsException("Invalid MimeType specified in FORMAT parameter");
return;
}
//Render map
Image img = this.map.GetMap();
//Png can't stream directy. Going through a memorystream instead
MemoryStream ms = new MemoryStream();
img.Save(ms, imageEncoder, null);
img.Dispose();
byte[] buffer = ms.ToArray();
this.context.Response.Clear();
this.context.Response.ContentType = imageEncoder.MimeType;
this.context.Response.BufferOutput = true;
this.context.Response.BinaryWrite(buffer);
this.context.Response.End();
}
}
