/// <summary>
/// Date and time message (ZDA). This should not normally need the last time as argument, because it defines it.
/// </summary>
public Waypoint(TalkerId talkerId, IEnumerable <string> fields, DateTimeOffset time)
: base(talkerId, Id, time)
{
IEnumerator <string> field = fields.GetEnumerator();
Position = new GeographicPosition();
Name = string.Empty;
double? wayPointLatitude = ReadValue(field);
CardinalDirection?wayPointHemisphere = (CardinalDirection?)ReadChar(field);
double? wayPointLongitude = ReadValue(field);
CardinalDirection?wayPointDirection = (CardinalDirection?)ReadChar(field);
string waypointName = ReadString(field);
if (wayPointLatitude.HasValue && wayPointLongitude.HasValue)
{
double?latitude = RecommendedMinimumNavigationInformation.Nmea0183ToDegrees(wayPointLatitude, wayPointHemisphere);
double?longitude = RecommendedMinimumNavigationInformation.Nmea0183ToDegrees(wayPointLongitude, wayPointDirection);
if (latitude.HasValue && longitude.HasValue)
{
Position = new GeographicPosition(latitude.Value, longitude.Value, 0);
Valid = true;
}
Name = waypointName;
}
}
public static void CoordinateAreEqual(double expectedLongitudeX, double expectedLatitudeY, GeographicPosition position)
{
GeographicPosition coordinate = (GeographicPosition)position;
Assert.AreEqual(expectedLongitudeX, coordinate.Longitude);
Assert.AreEqual(expectedLatitudeY, coordinate.Latitude);
}
private static void Internal_FillGeographyBuilder(SqlGeographyBuilder gb, MultiLineString multiLineString)
{
gb.BeginGeography(OpenGisGeographyType.MultiLineString);
foreach (var lineString in multiLineString.Coordinates)
{
gb.BeginGeography(OpenGisGeographyType.LineString);
bool beginFigureCalled = false;
foreach (var ipos in lineString.Coordinates)
{
GeographicPosition pos = ipos as GeographicPosition;
if (!beginFigureCalled)
{
gb.BeginFigure(pos.Latitude, pos.Longitude);
beginFigureCalled = true;
}
else
{
gb.AddLine(pos.Latitude, pos.Longitude);
}
}
gb.EndFigure();
gb.EndGeography();
}
gb.EndGeography();
}
static void Pointold(BinaryWriter p_bw, GeographicPosition p_Location)
{
p_bw.Write(s_WKBNDR);
p_bw.Write((Int32)WkbGeometryType.WkbPoint);
p_bw.Write(p_Location.Longitude);
p_bw.Write(p_Location.Latitude);
}
/// <summary>
/// Constructs a new WPT sentence
/// </summary>
public Waypoint(GeographicPosition position, string name)
: base(OwnTalkerId, Id, DateTimeOffset.UtcNow)
{
Position = position ?? throw new ArgumentNullException(nameof(position));
Name = name;
Valid = true;
}
static Polygon ParsePolygon(byte[] p_wkb, ref int p_pos)
{
var v_type = GetType(p_wkb, ref p_pos);
if (v_type != (uint)WkbGeometryType.WkbPolygon)
{
throw new Exception("Invalid object type");
}
var v_numLineStrings = GetUInt32(p_wkb, ref p_pos);
var v_LineStrings = new List <LineString>();
for (var v_ls = 0; v_ls < v_numLineStrings; ++v_ls)
{
var v_numPoints = GetUInt32(p_wkb, ref p_pos);
var v_Points = new GeographicPosition[v_numPoints];
for (var i = 0; i < v_numPoints; ++i)
{
v_Points[i] = GetGeographicPosition(p_wkb, ref p_pos);
}
v_LineStrings.Add(new LineString(v_Points));
}
return(new Polygon(v_LineStrings));
}
/// <summary>
/// Creates an ObservationsGISResult from a list of species observations.
/// </summary>
/// <param name="speciesObservationList">The observations list.</param>
/// <returns></returns>
public static SpeciesObservationsGeoJsonModel CreateResult(SpeciesObservationList speciesObservationList, FeatureCollection spatialFilter)
{
var features = new List <Feature>();
foreach (ISpeciesObservation observation in speciesObservationList)
{
// if x or y-coordinate doesn't exist, continue
if (!observation.Location.CoordinateX.HasValue || !observation.Location.CoordinateY.HasValue)
{
continue;
}
var pos = new GeographicPosition(observation.Location.CoordinateX.Value, observation.Location.CoordinateY.Value);
var point = new ArtDatabanken.GIS.GeoJSON.Net.Geometry.Point(pos);
var dicProperties = new Dictionary <string, object>();
dicProperties.Add("observationId", observation.Id);
dicProperties.Add("siteType", 2);
dicProperties.Add("accuracy", observation.Location.CoordinateUncertaintyInMeters);
var feature = new Feature(point, dicProperties);
feature.Id = observation.DatasetID;
features.Add(feature);
}
var featureCollection = new FeatureCollection(features);
var result = new SpeciesObservationsGeoJsonModel(featureCollection, spatialFilter);
return(result);
}
public static IPosition ToGeometry(this DirectPositionType pos)
{
IPosition position;
int dim;
string[] coord = pos.Text.Trim().Replace(" ", " ").Split(' ');
if (string.IsNullOrEmpty(pos.srsDimension))
{
dim = 2; /* We assume that we are in 2D */
}
else
{
dim = int.Parse(pos.srsDimension);
if (dim < 2 || dim > 3)
{
throw new InvalidFormatException("invalid GML representation: gml:pos dimension equals " + dim);
}
}
if (dim == 2)
{
position = new GeographicPosition(coord[0], coord[1]);
}
else
{
position = new GeographicPosition(coord[0], coord[1], coord[2]);
}
return(position);
}
public bool IsPointInPolygon(GeographicPosition p, GeographicPosition[] polygon)
{
double minLongitude = polygon[0].Longitude;
double maxLongitude = polygon[0].Longitude;
double minLatitude = polygon[0].Latitude;
double maxLatitude = polygon[0].Latitude;
for (int i = 1; i < polygon.Length; i++)
{
GeographicPosition q = polygon[i];
minLongitude = Math.Min(q.Longitude, minLongitude);
maxLongitude = Math.Max(q.Longitude, maxLongitude);
minLatitude = Math.Min(q.Latitude, minLatitude);
maxLatitude = Math.Max(q.Latitude, maxLatitude);
}
if (p.Longitude < minLongitude || p.Longitude > maxLongitude || p.Latitude < minLatitude || p.Latitude > maxLatitude)
{
return(false);
}
// http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
bool inside = false;
for (int i = 0, j = polygon.Length - 1; i < polygon.Length; j = i++)
{
if ((polygon[i].Latitude > p.Latitude) != (polygon[j].Latitude > p.Latitude) &&
p.Longitude < (polygon[j].Longitude - polygon[i].Longitude) * (p.Latitude - polygon[i].Latitude) / (polygon[j].Latitude - polygon[i].Latitude) + polygon[i].Longitude)
{
inside = !inside;
}
}
return(inside);
}
public void Feature_Equals_GetHashCode_Contract_Dictionary()
{
var leftDictionary = GetPropertiesInRandomOrder();
var rightDictionary = GetPropertiesInRandomOrder();
var geometry_10 = new GeographicPosition(10, 10);
var geometry_20 = new GeographicPosition(20, 20);
var left = new Net.Feature.Feature(new Point(
geometry_10),
leftDictionary,
"abc");
var right = new Net.Feature.Feature(new Point(
geometry_20),
rightDictionary,
"abc");
Assert_Are_Not_Equal(left, right); // different geometries
left = new Net.Feature.Feature(new Point(
geometry_10),
leftDictionary,
"abc");
right = new Net.Feature.Feature(new Point(
geometry_10),
rightDictionary,
"abc"); // identical geometries, different ids and or properties or not compared
Assert_Are_Equal(left, right);
}
private MultiPolygon GetShiftedMultpolygon(MultiPolygon multipolygon, ShiftingFactorForCoordinates shiftingOption)
{
List <LineString> lineStrings = multipolygon.Coordinates.SelectMany(polygon => polygon.Coordinates).ToList();
List <LineString> transformedLineStrings = new List <LineString>();
foreach (LineString line in lineStrings)
{
var updatedCoords = new List <IPosition>();
foreach (IPosition coords in line.Coordinates)
{
GeographicPosition geographicPosition = (GeographicPosition)coords;
var latitudeFactor = (shiftingOption.ShiftingFactorForY / _earthsRadiusInMeters) * 180 / Math.PI;
var longitudeFactor = (shiftingOption.ShiftingFactorForX / _earthsRadiusInMeters) * (180 / Math.PI) /
Math.Cos(geographicPosition.Latitude * Math.PI / 180);
updatedCoords.Add(
new GeographicPosition(
geographicPosition.Latitude + latitudeFactor,
geographicPosition.Longitude + longitudeFactor));
}
transformedLineStrings.Add(new LineString(updatedCoords));
}
var result = new MultiPolygon(new List <Polygon> {
new Polygon(transformedLineStrings)
});
return(result);
}
private static void Internal_FillGeographyBuilder(SqlGeographyBuilder gb, Point point)
{
gb.BeginGeography(OpenGisGeographyType.Point);
GeographicPosition pos = point.Coordinates as GeographicPosition;
gb.BeginFigure(pos.Latitude, pos.Longitude);
gb.EndFigure();
gb.EndGeography();
}
/// <summary>
/// Prints GEOJson dump of Sites
/// </summary>
/// <param name="requiredProperties">list of properties to include (if not found in siteproperties an empty string will be inserted)</param>
/// <param name="propertyFilter">two part filter in property table i.e. 'program:agrimet'</param>
public void Execute(string[] requiredProperties, string propertyFilter = "")
{
Console.Write("Content-Type: application/json\n\n");
var features = new List <Feature>();
FeatureCollection fc = new FeatureCollection(features);
var sites = db.GetSiteCatalog(propertyFilter: propertyFilter);
var siteProp = new TimeSeriesDatabaseDataSet.sitepropertiesDataTable(db);
int id = 0;
foreach (var s in sites)
{
var pos = new GeographicPosition(s.latitude, s.longitude);
var pt = new GeoJSON.Net.Geometry.Point(pos);
var props = siteProp.GetDictionary(s.siteid);
for (int i = 0; i < requiredProperties.Length; i++)
{
if (requiredProperties[i].Trim() == "")
{
continue;
}
if (!props.ContainsKey(requiredProperties[i]))
{
props.Add(requiredProperties[i], "");
}
}
props.Add("siteid", s.siteid);
props.Add("title", s.description);
props.Add("state", s.state);
props.Add("type", s.type);
if (!props.ContainsKey("region"))
{
props.Add("region", s.agency_region);
}
props.Add("install", s.install);
id++;
var feature = new Feature(pt, props, id.ToString());
fc.Features.Add(feature);
}
var settings = new JsonSerializerSettings();
settings.NullValueHandling = NullValueHandling.Ignore;
var json = Newtonsoft.Json.JsonConvert.SerializeObject(fc,
Newtonsoft.Json.Formatting.Indented, settings);
Console.WriteLine(json);
//File.WriteAllText(@"c:\temp\test.json", json);
}
public void Instantiation()
{
GeographicPosition geoPos = new GeographicPosition();
Assert.True(geoPos.ContainsValidPosition() == false);
geoPos = new GeographicPosition(0.1, 0.0, 200);
Assert.True(geoPos.ContainsValidPosition());
Assert.Equal(0.1, geoPos.Latitude, 10);
Assert.Equal(0, geoPos.Longitude, 10);
}
public void CrossTrackError1()
{
GeographicPosition start = new GeographicPosition(0, 0, 0);
GeographicPosition end = new GeographicPosition(1, 0, 0);
GreatCircle.CrossTrackError(start, end, start, out var crossTrackError, out Length distance);
Assert.Equal(59.7053933897411, distance.NauticalMiles, 2); // 1 degree latitude = ~60 nautical miles
Assert.Equal(0, crossTrackError.Meters); // start on track -> deviation is 0
}
public void Equality()
{
var p1 = new GeographicPosition(10, 20, 30);
var p2 = new GeographicPosition(p1);
Assert.Equal(p1, p2);
Assert.True(p1.EqualPosition(p2));
Assert.False(p1.Equals(null));
}
/// <summary>
/// Internal ctor
/// </summary>
public BearingAndDistanceToWayPoint(TalkerId talkerId, IEnumerable <string> fields, DateTimeOffset time)
: base(talkerId, Id, time)
{
IEnumerator <string> field = fields.GetEnumerator();
string timeString = ReadString(field);
DateTimeOffset now = ParseDateTime(time, timeString);
DateTime = now;
NextWayPointName = string.Empty;
NextWayPoint = new GeographicPosition();
double? nextWayPointLatitude = ReadValue(field);
CardinalDirection?nextWayPointHemisphere = (CardinalDirection?)ReadChar(field);
double? nextWayPointLongitude = ReadValue(field);
CardinalDirection?nextWayPointDirection = (CardinalDirection?)ReadChar(field);
double? bearingTrue = ReadValue(field);
string bearingTrueIdentifier = ReadString(field);
double? bearingMagnetic = ReadValue(field);
string bearingMagneticIdentifier = ReadString(field);
double? distance = ReadValue(field);
string nm = ReadString(field);
string wayPointName = ReadString(field);
if (nextWayPointLongitude.HasValue && nextWayPointLatitude.HasValue)
{
Valid = true;
double?latitude = RecommendedMinimumNavigationInformation.Nmea0183ToDegrees(nextWayPointLatitude, nextWayPointHemisphere);
double?longitude = RecommendedMinimumNavigationInformation.Nmea0183ToDegrees(nextWayPointLongitude, nextWayPointDirection);
if (latitude.HasValue && longitude.HasValue)
{
NextWayPoint = new GeographicPosition(latitude.Value, longitude.Value, 0);
}
NextWayPointName = wayPointName;
if (bearingTrue.HasValue && bearingTrueIdentifier == "T")
{
BearingTrueToWayPoint = Angle.FromDegrees(bearingTrue.Value);
}
if (bearingMagnetic.HasValue && bearingMagneticIdentifier == "M")
{
BearingMagneticToWayPoint = Angle.FromDegrees(bearingMagnetic.Value);
}
if (distance.HasValue && nm == "N")
{
DistanceToWayPoint = Length.FromNauticalMiles(distance.Value);
}
}
}
public double Distance(GeographicPosition pos1, GeographicPosition pos2)
{
var d1 = pos1.Latitude * (Math.PI / 180.0);
var num1 = pos1.Longitude * (Math.PI / 180.0);
var d2 = pos2.Latitude * (Math.PI / 180.0);
var num2 = pos2.Longitude * (Math.PI / 180.0) - num1;
var d3 = Math.Pow(Math.Sin((d2 - d1) / 2.0), 2.0) +
Math.Cos(d1) * Math.Cos(d2) * Math.Pow(Math.Sin(num2 / 2.0), 2.0);
return(6376500.0 * (2.0 * Math.Atan2(Math.Sqrt(d3), Math.Sqrt(1.0 - d3))));
}
/// <summary>
/// Creates a new route point.
/// </summary>
/// <param name="routeName">Name of the route</param>
/// <param name="indexInRoute">The index of this point</param>
/// <param name="totalPointsInRoute">The total number of points on this route</param>
/// <param name="waypointName">The name of this waypoint</param>
/// <param name="position">The position of the waypoint</param>
/// <param name="bearingToNextWaypoint">The direction to the next waypoint (optional, will be calculated when the route is constructed)</param>
/// <param name="distanceToNextWaypoint">The distance to the next waypoint (optional, will be calculated when the route is constructed)</param>
/// <remarks>
/// Route and point names should use ASCII characters only. Some devices may understand the extended ASCII code page (values > 127),
/// but this is rare. Most devices will silently truncate any names longer than 10 chars.
/// </remarks>
public RoutePoint(string routeName, int indexInRoute, int totalPointsInRoute, string waypointName, GeographicPosition position,
Angle?bearingToNextWaypoint, Length?distanceToNextWaypoint)
{
RouteName = routeName;
IndexInRoute = indexInRoute;
TotalPointsInRoute = totalPointsInRoute;
WaypointName = waypointName;
Position = position;
BearingToNextWaypoint = bearingToNextWaypoint;
DistanceToNextWaypoint = distanceToNextWaypoint;
}
public void CrossTrackError2()
{
GeographicPosition start = new GeographicPosition(1, 0, 0);
GeographicPosition end = new GeographicPosition(2, 0, 0);
GeographicPosition current = new GeographicPosition(1.75, 0, 0);
GreatCircle.CrossTrackError(start, end, current, out var crossTrackError, out Length distance);
Assert.Equal(14.9264938243846, distance.NauticalMiles, 4); // 1 degree latitude = 60 nautical miles. A quarter of it is remaining
Assert.Equal(0, crossTrackError.Meters); // On track -> deviation is 0
}
public void CrossTrackError4()
{
GeographicPosition start = new GeographicPosition(1, 0, 0);
GeographicPosition end = new GeographicPosition(2, 0, 0);
GeographicPosition current = new GeographicPosition(1.75, -1.0 / 60.0, 0);
GreatCircle.CrossTrackError(start, end, current, out var crossTrackError, out Length distance);
Assert.Equal(14.9264938243846, distance.NauticalMiles, 4); // 1 degree latitude = 60 nautical miles. A third of it is remaining
Assert.Equal(-1.00, crossTrackError.NauticalMiles, 2); // One nautical mile off, to the left
}
public void EqualityGeographicPosition()
{
var geoPos = new GeographicPosition(0.1, 0.0, 200);
var geoPos2 = new GeographicPosition(0.100000001, -0.000000002, 200);
var geoPos3 = new GeographicPosition(1, 2, 500);
Assert.True(geoPos.EqualPosition(geoPos2));
Assert.True(geoPos.Equals(geoPos2)); // Hmm... Equals is now implemented as AlmostEquals(). Is this wise?
Assert.True(!geoPos.EqualPosition(geoPos3));
}
private static void InternalDistDir(GeographicPosition startPosition,
GeographicPosition endPosition,
ref double distance, ref double direction)
{
double deltaLat = endPosition.Latitude - startPosition.Latitude;
double deltaLon = endPosition.Longitude - startPosition.Longitude;
double deltaX = deltaLon * GreatCircle.MetersPerDegreeLongitude * Math.Abs(Math.Cos(startPosition.Latitude * Math.PI / 180.0));
double deltaY = deltaLat * GreatCircle.MetersPerDegreeeLatitude;
distance = Math.Sqrt(deltaX * deltaX + deltaY * deltaY);
direction = GreatCircle.RadiansToAviatic(Math.Atan2(deltaY, deltaX));
}
public Task <bool?> GetRuleStatusAsync()
{
if (_vehicleStatus != null)
{
var point = new GeographicPosition(_vehicleStatus.Latitude, _vehicleStatus.Longitude);
return(Task.FromResult <bool?>(IsPointInPolygon(point, _points)));
}
else
{
return(Task.FromResult((bool?)null));
}
}
public static IPosition ToGeometry(this CoordType coord)
{
/* Check dimension consistancy */
if (coord.X == null || coord.Y == null)
{
throw new InvalidFormatException("invalid GML representation: gml:coord missing X or Y");
}
GeographicPosition geopos = new GeographicPosition(System.Convert.ToDouble(coord.X), System.Convert.ToDouble(coord.Y), System.Convert.ToDouble(coord.Z));
return(geopos);
}
public GeographicPosition ConvertPosition(GeographicPosition position, ICoordinateSystem fromCoordinateSystem,
ICoordinateSystem toCoordinateSystem)
{
if (position == null)
{
return(null);
}
var transformator = GetTransformator(fromCoordinateSystem, toCoordinateSystem);
return(ConvertGeographicPosition(transformator, position));
}
/// <summary>
/// Sets the next point on the route (i.e. to skip a missed waypoint)
/// </summary>
/// <param name="position">Position of next waypoint</param>
/// <returns>True on success, false otherwise. This returns false if the given position is not part of the route.</returns>
public bool SetNextPoint(GeographicPosition position)
{
var pt = _routePoints.FirstOrDefault(x => x.Position.EqualPosition(position));
if (pt != null)
{
_nextPoint = pt;
return(true);
}
return(false);
}
private async Task SaveNewPoint()
{
await StateManager.SetStateAsync("vehicleStatus", _vehicleStatus);
var point = new GeographicPosition(_vehicleStatus.Latitude, _vehicleStatus.Longitude);
bool newInside = IsPointInPolygon(point, _points);
if (_inside.HasValue && _inside.Value != newInside)
{
await SendNotification(_vehicleStatus.VehicleId, newInside? "Now we are inside the safe block" : "DANGER: We are outside the safe block!");
}
_inside = newInside;
}
public static Point PointFromDbGeometry(DbGeometry inp)
{
if (inp.SpatialTypeName != "Point")
{
throw new ArgumentException();
}
var coordinates = new GeographicPosition(inp.YCoordinate.GetValueOrDefault(), // due to the throw above, this will never default
inp.XCoordinate.GetValueOrDefault(), null);
var point = new Point(coordinates);
return(point);
}
private static Polygon ReadPolygonText(WktStreamTokenizer tokenizer)
{
//var pol = new Polygon(new List<LineString>
//{
// new LineString(new List<GeographicPosition>()
// {
// new GeographicPosition(0,0),
// new GeographicPosition(1,1),
// new GeographicPosition(0,0)
// })
//});
var nextToken = GetNextEmptyOrOpener(tokenizer);
if (nextToken == "EMPTY")
{
return(null);
}
var aneis = new List <LineString>();
do
{
var ring = GetCoordinates(tokenizer);
var max = ring.Count;
var vertices = new List <GeographicPosition>();
for (var i = 0; i < max; i++)
{
var lng = ring[i];
var lat = ring[i + 1];
var coord = new GeographicPosition(lat, lng);
i++;
vertices.Add(coord);
}
aneis.Add(new LineString(vertices));
nextToken = GetNextCloserOrComma(tokenizer);
} while (nextToken == ",");
var pol = new Polygon(
new List <LineString>(aneis)
);
return(pol);
}
/// <summary>
/// LineString from WKT.
/// </summary>
/// <returns>The LineString</returns>
/// <param name="wkt">WKT.</param>
public static LineString LineStringFromWKT(string wkt)
{
string[] terms = wkt.TrimStart('(').TrimEnd(')').Split(',');
string[] values;
List<IPosition> positions = new List<IPosition>(terms.Length);
GeographicPosition prevgeopos = null;
for (int i = 0; i < terms.Length; i++) {
values = terms[i].Trim(' ').Split(' ');
string z = (values.Length > 2 ? values[2] : null);
GeographicPosition geopos = new GeographicPosition(values[1], values[0], z);
try {
if (prevgeopos != null && Enumerable.SequenceEqual(geopos.Coordinates, prevgeopos.Coordinates))
continue;
} catch {
}
positions.Add(geopos);
prevgeopos = geopos;
}
LineString test = new LineString(positions);
return test;
}
private static IPosition FromGMLPos(XmlElement gml)
{
IPosition position;
int dim;
string gmlpos;
if (!IsGMLNamespace(gml, true))
return null;
if (gml.LocalName != "pos")
return null;
string dimension = gml.GetAttribute("srsDimension");
if (dimension == "") /* in GML 3.0.0 it was dimension */
dimension = gml.GetAttribute("dimension");
if (dimension == "")
dim = 2; /* We assume that we are in 2D */
else {
dim = int.Parse(dimension);
if (dim < 2 || dim > 3)
throw new InvalidFormatException("invalid GML representation: gml:pos dimension equals " + dim);
}
/* We retrieve gml:pos string */
gmlpos = gml.InnerText.Trim();
/* gml:pos pattern:
* x1 y1
* x1 y1 z1
*/
string[] pos = gmlpos.Split(' ');
position = new GeographicPosition(pos[0], pos[1], pos[2]);
return position;
}
/// <summary>
/// LineString from WK.
/// </summary>
/// <returns>The LineString</returns>
/// <param name="wkt">WKT.</param>
public static LineString LineStringFromWKT(string wkt)
{
string[] terms = wkt.TrimStart('(').TrimEnd(')').Split(',');
string[] values;
List<IPosition> positions = new List<IPosition>(terms.Length);
for (int i = 0; i < terms.Length; i++) {
values = terms[i].Trim(' ').Split(' ');
string z = (values.Length > 2 ? values[2] : null);
GeographicPosition geopos = new GeographicPosition(values[1], values[0], z);
positions.Add(geopos);
}
LineString test = new LineString(positions);
return test;
}
/// <summary>
/// MultiPoint from WK.
/// </summary>
/// <returns>The MultiPoint</returns>
/// <param name="wkt">WKT.</param>
public static MultiPoint MultiPointFromWKT(string wkt)
{
string[] terms = wkt.TrimStart('(').TrimEnd(')').Trim(' ').Split(',');
string[] values;
List<IPosition> points = new List<IPosition>(terms.Length);
for (int i = 0; i < terms.Length; i++) {
values = terms[i].Split(' ');
string z = (values.Length > 2 ? values[2] : null);
GeographicPosition geopos = new GeographicPosition(values[1], values[0], z);
points.Add(geopos);
}
return new MultiPoint(points);
}
/// <summary>
/// Point from WK.
/// </summary>
/// <returns>The Point</returns>
/// <param name="wkt">WKT.</param>
public static Point PointFromWKT(string wkt)
{
string[] values;
values = wkt.Trim(' ').Split(' ');
string z = (values.Length > 2 ? values[2] : null);
GeographicPosition geopos = new GeographicPosition(values[1], values[0], z);
return new Point(geopos);
}
public static IPosition ToGeometry(this CoordType coord)
{
/* Check dimension consistancy */
if (coord.X == null || coord.Y == null)
throw new InvalidFormatException("invalid GML representation: gml:coord missing X or Y");
GeographicPosition geopos = new GeographicPosition(System.Convert.ToDouble(coord.X), System.Convert.ToDouble(coord.Y), System.Convert.ToDouble(coord.Z));
return geopos;
}
public static IPosition ToGeometry(this DirectPositionType pos)
{
IPosition position;
int dim;
string[] coord = pos.Text.Trim().Split(' ');
if (string.IsNullOrEmpty(pos.srsDimension))
dim = 2; /* We assume that we are in 2D */
else {
dim = int.Parse(pos.srsDimension);
if (dim < 2 || dim > 3)
throw new InvalidFormatException("invalid GML representation: gml:pos dimension equals " + dim);
}
if (dim == 2)
position = new GeographicPosition(coord[0], coord[1]);
else
position = new GeographicPosition(coord[0], coord[1], coord[2]);
return position;
}
private static IPosition FromGMLCoord(XmlElement element)
{
double? x = null, y = null, z = null;
foreach (XmlElement el in element.ChildNodes) {
if (!IsGMLNamespace(el, false))
continue;
if (el.LocalName == "X")
x = double.Parse(el.InnerText);
if (el.LocalName == "Y")
y = double.Parse(el.InnerText);
if (el.LocalName == "Z")
z = double.Parse(el.InnerText);
}
/* Check dimension consistancy */
if (x == null || y == null)
throw new InvalidFormatException("invalid GML representation: gml:coord missing X or Y");
GeographicPosition geopos = new GeographicPosition(y.Value, x.Value, z.Value);
return geopos;
}
public static List<LineString> SplitWorldExtent(LineString lineString)
{
List<LineString> newLineStrings = new List<LineString>();
LineString currentLineString = new LineString();
newLineStrings.Add(currentLineString);
GeographicPosition previous_position = (GeographicPosition)lineString.Positions[0];
currentLineString.Positions.Add(previous_position);
int currentPosition = 0;
int dayline = 0;
for (int i = 1; i < lineString.Positions.Count; i++) {
GeographicPosition current_position = (GeographicPosition)lineString.Positions[i];
if ((current_position.Longitude != 180 && previous_position.Longitude != 180) || (current_position.Longitude != -180 && previous_position.Longitude != -180)) {
if ((current_position.Longitude - previous_position.Longitude < -90) || (current_position.Longitude - previous_position.Longitude > 90)) {
LineString newLineString = currentLineString;
if (current_position.Longitude - previous_position.Longitude > 90) {
dayline--;
if (currentPosition == 0) {
newLineString = new LineString();
newLineStrings.Insert(0, newLineString);
} else {
newLineString = newLineStrings[--currentPosition];
}
}
if (current_position.Longitude - previous_position.Longitude < -90) {
dayline++;
if (newLineStrings.Count <= currentPosition + 1) {
newLineString = new LineString();
newLineStrings.Add(newLineString);
} else {
newLineString = newLineStrings[currentPosition + 1];
}
currentPosition++;
}
double new_longitude;
double new_latitude;
double? new_altitude;
double new_longitude2;
double new_latitude2;
double? new_altitude2;
if (previous_position.Longitude > 0) {
new_longitude = 180;
new_longitude2 = -180;
} else {
new_longitude = -180;
new_longitude2 = 180;
}
// Calaculate the latitude to be linear with the next point
if ((current_position.Longitude - previous_position.Longitude + 2 * new_longitude) == 0) {
new_latitude = (current_position.Latitude - previous_position.Latitude) * (-1 * new_longitude - previous_position.Longitude + 2 * new_longitude) + previous_position.Latitude;
} else {
new_latitude = (current_position.Latitude - previous_position.Latitude) * (-1 * new_longitude - previous_position.Longitude + 2 * new_longitude) / (current_position.Longitude - previous_position.Longitude + 2 * new_longitude) + previous_position.Latitude;
}
new_latitude2 = new_latitude;
new_altitude = new_altitude2 = current_position.Altitude;
GeographicPosition new_position1 = new GeographicPosition(new_latitude, new_longitude, new_altitude);
GeographicPosition new_position2 = new GeographicPosition(new_latitude2, new_longitude2, new_altitude2);
newLineString.Positions.Add(new_position2);
currentLineString.Positions.Add(new_position1);
if (dayline == 0)
currentLineString.Positions.Add(currentLineString.Positions[0]);
currentLineString = newLineString;
}
}
currentLineString.Positions.Add(current_position);
previous_position = current_position;
}
return newLineStrings;
}
