private static Polyline CreatePolyline(string pointslist, bool toMercator)
{
PointCollection path = new PointCollection();
string[] coords = pointslist.Split(' ');
MapPoint point = null;
double lat, lon;
for (int i = 0; i < coords.Length; i += 2)
{
lat = double.Parse(coords[i]);
lon = double.Parse(coords[i + 1]);
point = new MapPoint(lon, lat, new SpatialReference(4326));
path.Add((toMercator) ? point.GeographicToWebMercator() : point);
}
Polyline polyline = new Polyline();
if (path.Count > 0)
{
polyline.SpatialReference = path[0].SpatialReference;
polyline.Paths.Add(path);
}
return(polyline);
}
private static Polygon CreatePolygon(string exteriorPoints, string interiorPoints, bool toMercator)
{
PointCollection exPath = new PointCollection();
string[] exCoords = exteriorPoints.Split(' ');
MapPoint point = null;
double lat, lon;
for (int i = 0; i < exCoords.Length; i += 2)
{
lat = double.Parse(exCoords[i]);
lon = double.Parse(exCoords[i + 1]);
point = new MapPoint(lon, lat, new SpatialReference(4326));
exPath.Add((toMercator) ? point.GeographicToWebMercator() : point);
}
Polygon polygon = new Polygon();
if (exPath.Count > 0)
{
polygon.SpatialReference = exPath[0].SpatialReference;
polygon.Rings.Add(exPath);
}
if (!string.IsNullOrEmpty(interiorPoints))
{
PointCollection inPath = new PointCollection();
string[] inCoords = interiorPoints.Split(' ');
for (int i = 0; i < exCoords.Length; i += 2)
{
lat = double.Parse(exCoords[i]);
lon = double.Parse(exCoords[i + 1]);
point = new MapPoint(lon, lat, new SpatialReference(4326));
inPath.Add((toMercator) ? point.GeographicToWebMercator() : point);
}
polygon.Rings.Add(inPath);
}
return(polygon);
}
public static MapPoint ParseW3CGeometry(List <XElement> geoElems, bool toMercator)
{
MapPoint point = null;
double lat = -999.0, lon = -999.0;
foreach (XElement elem in geoElems)
{
if (elem.Name.LocalName.ToLower() == "point")
{
foreach (XElement geoElem in elem.Elements())
{
if (geoElem.Name.LocalName == "lat")
{
lat = double.Parse(geoElem.Value);
}
else if (geoElem.Name.LocalName == "long")
{
lon = double.Parse(geoElem.Value);
}
}
}
else if (elem.Name.LocalName == "lat")
{
lat = double.Parse(elem.Value);
}
else if (elem.Name.LocalName == "long")
{
lon = double.Parse(elem.Value);
}
if (lat > -999.0 && lon > -999.0)
{
point = new MapPoint(lon, lat, new SpatialReference(4326));
if (toMercator)
{
point = point.GeographicToWebMercator();
}
}
}
return(point);
}
/// <summary>
/// Convert extent to Envelope between Mercator(102100) and Geographic(4326) spatial references
/// If it is other spatial reference, use GeometryTool to project the envelope
/// </summary>
/// <param name="outSRWKID"></param>
public Envelope ToEnvelope(int outSRWKID)
{
Envelope envelope = null;
if (GeometryTool.IsWebMercatorSR(outSRWKID) && GeometryTool.IsGeographicSR(this.spatialReference))
{
MapPoint mPoint1 = new MapPoint(this.xmin, this.ymin, new SpatialReference(4326));
MapPoint mPoint2 = new MapPoint(this.xmax, this.ymax, new SpatialReference(4326));
envelope = new Envelope(mPoint1.GeographicToWebMercator(), mPoint2.GeographicToWebMercator());
}
else if (GeometryTool.IsWebMercatorSR(this.spatialReference) && GeometryTool.IsGeographicSR(outSRWKID))
{
MapPoint mPoint1 = new MapPoint(this.xmin, this.ymin, new SpatialReference(this.spatialReference));
MapPoint mPoint2 = new MapPoint(this.xmax, this.ymax, new SpatialReference(this.spatialReference));
envelope = new Envelope(mPoint1.WebMercatorToGeographic(), mPoint2.WebMercatorToGeographic());
}
else if (this.spatialReference == outSRWKID)
{
envelope = ToEnvelope();
}
return(envelope);
}
private Polygon CreateBufferCircle(MapPoint center, double radius, bool toMercator)
{
double pi36 = Math.PI / 180.0;
double rx = radius, ry = radius;
double dx = 1.0, dy = 1.0;
ScaleLine.ScaleLineUnit units = UnitsHelper.GetUnitsByWKID(center.SpatialReference.WKID);
if (units == ScaleLine.ScaleLineUnit.DecimalDegrees)
{
double[] conversion = UnitsHelper.GetConversionToDegree(center.Y, ScaleLine.ScaleLineUnit.Meters);
rx = radius * conversion[0];
ry = radius * conversion[1];
}
else
{
double conversion = UnitsHelper.GetConversionFromMeter(units);
rx = radius * conversion;
ry = radius * conversion;
}
PointCollection pointSet = new PointCollection();
for (int i = 0; i <= 36; i++)
{
dx = center.X + rx * Math.Cos(i * 10 * pi36);
dy = center.Y + ry * Math.Sin(i * 10 * pi36);
MapPoint p = new MapPoint(dx, dy, new SpatialReference(center.SpatialReference.WKID));
pointSet.Add((center.SpatialReference.WKID == 4326 && toMercator) ? p.GeographicToWebMercator() : p);
}
Polygon circle = new Polygon();
circle.Rings.Add(pointSet);
circle.SpatialReference = new SpatialReference((center.SpatialReference.WKID == 4326 && toMercator) ? 102113 : center.SpatialReference.WKID);
return(circle);
}
public static Geometry ParseGeoRSSGeometry(XElement geoElem, bool toMercator)
{
Geometry geometry = null;
string[] coords = { };
switch (geoElem.Name.LocalName)
{
case "box":
coords = geoElem.Value.Trim().Split(' ');
if (coords.Length == 2)
{
MapPoint point1 = new MapPoint(double.Parse(coords[1]), double.Parse(coords[0]), new SpatialReference(4326));
MapPoint point2 = new MapPoint(double.Parse(coords[3]), double.Parse(coords[2]), new SpatialReference(4326));
geometry = (toMercator) ? (new Envelope(point1.GeographicToWebMercator(), point2.GeographicToWebMercator())) : (new Envelope(point1, point2));
}
break;
case "point":
coords = geoElem.Value.Trim().Split(' ');
if (coords.Length == 2)
{
MapPoint point = new MapPoint(double.Parse(coords[1]), double.Parse(coords[0]), new SpatialReference(4326));
geometry = (toMercator) ? point.GeographicToWebMercator() : point;
}
break;
case "line":
geometry = CreatePolyline(geoElem.Value.Trim(), toMercator);
break;
case "polygon":
geometry = CreatePolygon(geoElem.Value.Trim(), "", toMercator);
break;
case "where":
string pointString = "";
XElement firstElem = (XElement)geoElem.FirstNode;
if (firstElem.Name.NamespaceName.ToLower() == NS_GML)
{
switch (firstElem.Name.LocalName.ToLower())
{
case "point":
pointString = ((XElement)firstElem.FirstNode).Value.Trim();
coords = pointString.Split(' ');
if (coords.Length == 2)
{
MapPoint point = new MapPoint(double.Parse(coords[1]), double.Parse(coords[0]), new SpatialReference(4326));
geometry = (toMercator) ? point.GeographicToWebMercator() : point;
}
break;
case "envelope":
pointString = ((XElement)firstElem.FirstNode).Value.Trim();
coords = pointString.Split(' ');
MapPoint point1 = new MapPoint(double.Parse(coords[1]), double.Parse(coords[0]), new SpatialReference(4326));
pointString = ((XElement)firstElem.LastNode).Value.Trim();
coords = pointString.Split(' ');
MapPoint point2 = new MapPoint(double.Parse(coords[1]), double.Parse(coords[0]), new SpatialReference(4326));
geometry = (toMercator) ? (new Envelope(point1.GeographicToWebMercator(), point2.GeographicToWebMercator())) : (new Envelope(point1, point2));
break;
case "linestring":
pointString = ((XElement)firstElem.FirstNode).Value.Trim();
geometry = CreatePolyline(pointString, toMercator);
break;
case "polygon":
string exteriorPoints = "";
string interiorPoints = "";
foreach (XElement elem in firstElem.Elements())
{
if (elem.Name.LocalName.ToLower() == "exterior")
{
exteriorPoints = ((XElement)((XElement)elem.FirstNode).FirstNode).Value;
}
if (elem.Name.LocalName.ToLower() == "interior")
{
interiorPoints = ((XElement)((XElement)elem.FirstNode).FirstNode).Value;
}
}
geometry = CreatePolygon(exteriorPoints, interiorPoints, toMercator);
break;
}
}
break;
}
return(geometry);
}