/// <summary>
/// <param name="locations">A 2D map of locations on the surface of earth. </param>
/// </summary>
public void FillElevationData(ref LatLonAlt[,] locations)
{
CultureInfo ci = new CultureInfo("en-US");
List<string> loc = new List<string>();
for (int J = 0; J < locations.GetLength(0); J++)
{
for (int I = 0; I < locations.GetLength(1); I++)
{
loc.Add(String.Format(ci, "{0:0.0000},{1:0.0000}", locations[I, J].Latitude, locations[I, J].Longitude));
}
}
var url = String.Format("http://maps.googleapis.com/maps/api/elevation/xml?sensor=false&locations={0}", loc.Aggregate((i, j) => i + "|" + j));
Console.WriteLine("Fetching elevation data from maps.googleapis.com...");
XmlDocument elevationData = new XmlDocument();
elevationData.Load(url);
XmlNodeList xmlNodeList = elevationData.SelectNodes("/ElevationResponse/result/elevation");
var di = 0; // A local counter
int x = 0; // the I-index of the matrix
int y = 0; // the J-index of the matrix.
foreach (XmlNode xmlNode in xmlNodeList)
{
// Update locations directly as we're spinning through all XML nodes.
locations[x, y].Altitude = double.Parse(xmlNode.InnerText, ci.NumberFormat);
di++;
x = di % locations.GetLength(0);
if (x == 0) y++;
}
}
static void Main(string[] args)
{
try
{
// Set the Culture Info for the entire main thread.
Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture("en-US");
// Using the "Command Line Parser Library" from CodePlex
// The MIT License (MIT)
// Copyright (c) 2005 - 2012 Giacomo Stelluti Scala
var options = new Options();
ICommandLineParser parser = new CommandLineParser();
/// Example
/// elevation --dms-latitude 61:53:37.20 --dms-longitude 9:51:43.92 --num-cells-I 10 --num-cells-J 10 --distance-ew 2000.0 --distance-ns 2000.0 --output rondane.stl
if (parser.ParseArguments(args, options))
{
// consume Options type properties
var lat = options.dmsLatitude;
var lon = options.dmsLongitude;
var ni = options.NI;
var nj = options.NJ;
var distSN = options.distNS;
var distEW = options.distEW;
// Generate a surface, i.e. a map of LatLonAlt types surrounding the initial
// central location given by the user.
var surface = new Surface(new LatLonAlt(lat, lon), distSN, distEW);
var locations = new LatLonAlt[ni, nj];
surface.GenerateSurface(ref locations);
// Fetch elevation data from Google
var service = new GoogleElevationService();
service.FillElevationData(ref locations);
// Generate a matrix of vertices using cartesian coordinates with
// the point of interest in the center (0,0)
var vertices = GenerateVerticesMatrix(ref locations, ni, nj, distEW, distSN);
// Write the map to an STL output file
var fileName = options.Output;
//var vertices = Vertex.ToVertex(ref locations);
var stl = new Stereolithography(vertices); // vertices);
stl.Write(fileName);
Console.WriteLine(String.Format("Output written to {0}", fileName));
}
}
catch (Exception e)
{
Console.WriteLine("{0} Exception Error", e);
}
}
/// <summary>
/// Calculates the end-point from a given source at a given range (meters) and bearing (degrees).
/// This methods uses simple geometry equations to calculate the end-point.
/// </summary>
/// <param name="source">Point of origin</param>
/// <param name="range">Range in meters</param>
/// <param name="bearing">Bearing in degrees</param>
/// <returns>End-point from the source given the desired range and bearing.</returns>
///
public static LatLonAlt CalculateDerivedPosition(LatLonAlt source, double distance, double bearing)
{
double latA = source.Latitude * DegreesToRadians;
double lonA = source.Longitude * DegreesToRadians;
double angularDistance = distance / EarthRadius;
double trueCourse = bearing * DegreesToRadians;
double lat = Math.Asin(Math.Sin(latA) * Math.Cos(angularDistance) + Math.Cos(latA) * Math.Sin(angularDistance) * Math.Cos(trueCourse));
double dlon = Math.Atan2(Math.Sin(trueCourse) * Math.Sin(angularDistance) * Math.Cos(latA),
Math.Cos(angularDistance) - Math.Sin(latA) * Math.Sin(lat));
double lon = ((lonA + dlon + Math.PI) % (Math.PI * 2.0)) - Math.PI;
return(new LatLonAlt(lat * RadiansToDegrees, lon * RadiansToDegrees, source.Altitude));
}
/// <summary>
/// Calculates the end-point from a given source at a given range (meters) and bearing (degrees).
/// This methods uses simple geometry equations to calculate the end-point.
/// </summary>
/// <param name="source">Point of origin</param>
/// <param name="range">Range in meters</param>
/// <param name="bearing">Bearing in degrees</param>
/// <returns>End-point from the source given the desired range and bearing.</returns>
///
public static LatLonAlt CalculateDerivedPosition(LatLonAlt source, double distance, double bearing)
{
double latA = source.Latitude * DegreesToRadians;
double lonA = source.Longitude * DegreesToRadians;
double angularDistance = distance / EarthRadius;
double trueCourse = bearing * DegreesToRadians;
double lat = Math.Asin(Math.Sin(latA) * Math.Cos(angularDistance) + Math.Cos(latA) * Math.Sin(angularDistance) * Math.Cos(trueCourse));
double dlon = Math.Atan2(Math.Sin(trueCourse) * Math.Sin(angularDistance) * Math.Cos(latA),
Math.Cos(angularDistance) - Math.Sin(latA) * Math.Sin(lat));
double lon = ((lonA + dlon + Math.PI) % (Math.PI * 2.0)) - Math.PI;
return new LatLonAlt(lat * RadiansToDegrees, lon * RadiansToDegrees, source.Altitude);
}
/// <summary>
/// Generates a cartesian mesh by inserting relative X and Y coordinates based on the given distance
/// and Z (elevation) based on a locations map.
/// </summary>
/// <param name="locations">Location data containing elevation information</param>
/// <param name="ni">Number of horizontal (X) grid cells</param>
/// <param name="nj">Number of vertical (Y) grid cells</param>
/// <param name="distEW">Total horizontal distance</param>
/// <param name="distSN">Total vertical distance</param>
/// <returns></returns>
private static Vertex[,] GenerateVerticesMatrix(ref LatLonAlt[,] locations, int ni, int nj, double distEW, double distSN)
{
var x0 = -distEW / 2F;
var y0 = -distSN / 2F;
var y = y0;
double dx = distEW / (double)ni;
double dy = distSN / (double)nj;
var vertices = new Vertex[ni, nj];
for (var j = 0; j < nj; j++)
{
var x = x0;
for (var i = 0; i < ni; i++)
{
vertices[i, j] = new Vertex(x, y, locations[i, j].Altitude);
x += dx;
}
y += dy;
}
return vertices;
}
public static Vertex[,] ToVertex(ref LatLonAlt[,] pos)
{
var vertex = new Vertex[pos.GetLength(0), pos.GetLength(1)];
for (var j = 0; j < pos.GetLength(1); j++)
{
for (var i = 0; i < pos.GetLength(1); i++)
{
vertex[i, j] = ToVertex(pos[i, j]);
}
}
return vertex;
}
public static Vertex ToVertex(LatLonAlt pos)
{
var vertex = new Vertex(pos.Latitude, pos.Longitude, pos.Altitude);
return vertex;
}
public static Vertex ToVertex(LatLonAlt pos)
{
var vertex = new Vertex(pos.Latitude, pos.Longitude, pos.Altitude);
return(vertex);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="center">The center of the map</param>
/// <param name="distanceNS">Length of the map from South to North (in meters)</param>
/// <param name="distanceEW">Length of the map from East to West (in meters)</param>
/// <param name="ni">Number of grid cells in I - direction (EW)</param>
/// <param name="nj">Number of grid cells in J - direction (NS)</param>
/// <author>Thomas F. Hagelien</author>
public Surface(LatLonAlt center, double distanceNS, double distanceEW)
{
Center = center;
DistanceNS = distanceNS;
DistanceEW = distanceEW;
}
/// <summary>
/// Constructor using default settings (10x10 grid, 100m bearing)
/// </summary>
/// <param name="center">The center of the map</param>
public Surface(LatLonAlt center)
{
Center = center;
DistanceEW = 100.0;
DistanceNS = 100.0;
}
public void GenerateSurface(ref LatLonAlt [,] locations)
{
var west = Geometry.CalculateDerivedPosition(Center, DistanceNS / 2.0, 180.0);
var southWest = Geometry.CalculateDerivedPosition(west, DistanceEW / 2.0, 240.0);
var ni = locations.GetLength(0);
var nj = locations.GetLength(1);
double dNS = DistanceNS / (double)ni;
double dEW = DistanceEW / (double)nj;
// Fill in the geographics from southWest up to northEast.
var position = southWest;
for (int J = 0; J < nj; ++J)
{
position = Geometry.CalculateDerivedPosition(position, dEW * (double)J, 90.0);
locations[0, J] = position;
for (int I = 1; I < ni; I++)
{
locations[I, J] = Geometry.CalculateDerivedPosition(position, dNS * (double)I, 0.0);
}
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="center">The center of the map</param>
/// <param name="distanceNS">Length of the map from South to North (in meters)</param>
/// <param name="distanceEW">Length of the map from East to West (in meters)</param>
/// <param name="ni">Number of grid cells in I - direction (EW)</param>
/// <param name="nj">Number of grid cells in J - direction (NS)</param>
/// <author>Thomas F. Hagelien</author>
public Surface(LatLonAlt center, double distanceNS, double distanceEW)
{
Center = center;
DistanceNS = distanceNS;
DistanceEW = distanceEW;
}
/// <summary>
/// Constructor using default settings (10x10 grid, 100m bearing)
/// </summary>
/// <param name="center">The center of the map</param>
public Surface(LatLonAlt center)
{
Center = center;
DistanceEW = 100.0;
DistanceNS = 100.0;
}
static void Main(string[] args)
{
try
{
// Set the Culture Info for the entire main thread.
Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture("en-US");
// Using the "Command Line Parser Library" from CodePlex
// The MIT License (MIT)
// Copyright (c) 2005 - 2012 Giacomo Stelluti Scala
var options = new Options();
ICommandLineParser parser = new CommandLineParser();
/// Example
/// elevation --dms-latitude 61:53:37.20 --dms-longitude 9:51:43.92 --num-cells-I 10 --num-cells-J 10 --distance-ew 2000.0 --distance-ns 2000.0 --output rondane.stl
if (parser.ParseArguments(args, options))
{
// consume Options type properties
var lat = options.dmsLatitude;
var lon = options.dmsLongitude;
var ni = options.NI;
var nj = options.NJ;
var distSN = options.distNS;
var distEW = options.distEW;
// Generate a surface, i.e. a map of LatLonAlt types surrounding the initial
// central location given by the user.
var surface = new Surface(new LatLonAlt(lat, lon), distSN, distEW);
var locations = new LatLonAlt[ni, nj];
surface.GenerateSurface(ref locations);
// Fetch elevation data from Google
var service = new GoogleElevationService();
service.FillElevationData(ref locations);
// Generate a matrix of vertices using cartesian coordinates with
// the point of interest in the center (0,0)
var vertices = GenerateVerticesMatrix(ref locations, ni, nj, distEW, distSN);
// Write the map to an STL output file
var fileName = options.Output;
//var vertices = Vertex.ToVertex(ref locations);
var stl = new Stereolithography(vertices); // vertices);
stl.Write(fileName);
Console.WriteLine(String.Format("Output written to {0}", fileName));
}
}
catch (Exception e)
{
Console.WriteLine("{0} Exception Error", e);
}
}