// metric coordinates
public static IFeatureSet CreateUserInputLayer(double lon, double lat, double radius, string workdir)
{
FeatureSet infs = new FeatureSet(DotSpatial.Topology.FeatureType.Point);
infs.Projection = KnownCoordinateSystems.Projected.WorldSpheroid.Mercatorsphere;
DotSpatial.Data.Feature center = new DotSpatial.Data.Feature(new Coordinate(lon, lat));
infs.AddFeature(center);
var fs = infs.Buffer(radius, false);
fs.SaveAs(WORKSPACE_DIR + workdir + "/usr.shp", true);
return(fs);
}
public static IEnumerable <OCM.API.Common.LatLon> SearchPolygonFromPolyLine(List <OCM.API.Common.LatLon> points, double distanceKM)
{
List <OCM.API.Common.LatLon> polyPoints = new List <OCM.API.Common.LatLon>();
//http://dotspatial.codeplex.com/wikipage?title=CycleThroughVerticesCS&referringTitle=Desktop_SampleCode
//create feature set from points
Feature f = new Feature();
FeatureSet fs = new FeatureSet(f.FeatureType);
Coordinate[] coord = new Coordinate[points.Count];
for (int i = 0; i < points.Count; i++)
{
coord[i] = new Coordinate((double)points[i].Latitude, (double)points[i].Longitude);
}
LineString ls = new LineString(coord);
f = new Feature(ls);
fs.Features.Add(f);
//fs.Buffer(distanceKM, false); //TODO: approx km to lat/long coord value
IFeatureSet iF = fs.Buffer(0.02, false);
//export polygon points
Extent extent = new Extent(-180, -90, 180, 90);
foreach (ShapeRange shape in iF.ShapeIndices)
{
//if (shape.Intersects(extent))
foreach (PartRange part in shape.Parts)
{
foreach (Vertex vertex in part)
{
// if (vertex.X > 0 && vertex.Y > 0)
{
// prepare export of polygon points
polyPoints.Add(new OCM.API.Common.LatLon {
Latitude = vertex.X, Longitude = vertex.Y
});
}
}
}
}
return(polyPoints);
}