/// <summary>
/// Converts from map coordinates to screen.
/// </summary>
/// <param name="mapPoint">Point to conversion (in map coordinates).</param>
/// <param name="extent">Map extent.</param>
/// <param name="width">Image width.</param>
/// <param name="height">Image height.</param>
/// <returns>Converted point in screen coordinates.</returns>
private SysWindows.Point _ConvertPoint(AppGeometry.Point mapPoint,
EnvelopeN extent,
double width,
double height)
{
Debug.Assert(null != mapPoint);
Debug.Assert(null != extent);
Debug.Assert(0 < width);
Debug.Assert(0 < height);
AppGeometry.Point projectedPointFrom =
WebMercatorUtil.ProjectPointToWebMercator(mapPoint, _mapInfo.SpatialReference.WKID);
double x = width * (projectedPointFrom.X - extent.XMin) / (extent.XMax - extent.XMin);
double y =
height - height * (projectedPointFrom.Y - extent.YMin) / (extent.YMax - extent.YMin);
SysWindows.Point pointTo = new SysWindows.Point(x, y);
return pointTo;
}
/// <summary>
/// Create map point and project to webmercator if needed.
/// </summary>
/// <param name="point">Source point.</param>
/// <returns>Map point in correct projection.</returns>
private ArcGISGeometry.MapPoint _CreateProjectedMapPoint(ArcLogisticsGeometry.Point point)
{
ArcLogisticsGeometry.Point projectedPoint = new ArcLogisticsGeometry.Point(point.X, point.Y);
if (ParentLayer != null && ParentLayer.SpatialReferenceID != null)
{
projectedPoint = WebMercatorUtil.ProjectPointToWebMercator(projectedPoint, ParentLayer.SpatialReferenceID.Value);
}
ArcGISGeometry.MapPoint mapPoint = new ArcGISGeometry.MapPoint(projectedPoint.X, projectedPoint.Y);
return mapPoint;
}
/// <summary>
/// Checks that distance between specified points is less than or equal to the specified
/// maximum distance.
/// </summary>
/// <param name="first">The first point to be checked.</param>
/// <param name="second">The second point to be checked.</param>
/// <param name="maxDistance">The maximum distance in meters.</param>
/// <returns>True if and only if the distance between two points does not exceed
/// <paramref name="maxDistance"/>.</returns>
private static bool _CheckDistance(
ALGeometry.Point first,
ALGeometry.Point second,
double maxDistance)
{
var longitude1 = _Normalize(first.X);
var latitude1 = _Normalize(first.Y);
var longitude2 = _Normalize(second.X);
var latitude2 = _Normalize(second.Y);
var radius = DistCalc.GetExtentRadius(longitude1, latitude1, maxDistance);
// Simple Euclidean geometry should be ok for small distances.
var distance = Math.Sqrt(_Sqr(longitude2 - longitude1) + _Sqr(latitude2 - latitude1));
return distance < radius;
}
/// <summary>
/// Does object reverse geocoding safelly.
/// </summary>
/// <param name="point">Point to geocoding.</param>
/// <returns>Address by point or NULL.</returns>
private Address _ReverseGeocodeSave(AppGeometry.Point point)
{
Debug.Assert(null != point); // created
Address geocodedAddress = null;
try
{
geocodedAddress = App.Current.Geocoder.ReverseGeocode(point);
}
catch (Exception ex)
{
// store exception
_detectedException = ex;
}
return geocodedAddress;
}