1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
using namespace System;
using namespace NETGeographicLib;
int main(array<System::String ^> ^/*args*/)
{
try {
// Print waypoints between JFK and SIN
GeodesicExact^ geod = gcnew GeodesicExact(); // WGS84
double
lat1 = 40.640, lon1 = -73.779, // JFK
lat2 = 1.359, lon2 = 103.989; // SIN
double s12, azi1, azi2,
a12 = geod->Inverse(lat1, lon1, lat2, lon2, s12, azi1, azi2);
GeodesicLineExact^ line = gcnew GeodesicLineExact(geod, lat1, lon1, azi1, Mask::ALL);
// Alternatively
// const GeographicLib::GeodesicLine line = geod.Line(lat1, lon1, azi1);
double ds = 500e3; // Nominal distance between points = 500 km
int num = int(Math::Ceiling(s12 / ds)); // The number of intervals
{
// Use intervals of equal length
double ds = s12 / num;
for (int i = 0; i <= num; ++i) {
double lat, lon;
line->Position(i * ds, lat, lon);
Console::WriteLine( String::Format( "i: {0} Latitude: {1} Longitude: {2}", i, lat, lon ));
}
}
{
// Slightly faster, use intervals of equal arc length
double da = a12 / num;
for (int i = 0; i <= num; ++i) {
double lat, lon;
line->ArcPosition(i * da, lat, lon);
Console::WriteLine( String::Format( "i: {0} Latitude: {1} Longitude: {2}", i, lat, lon ));
}
}
}
catch (GeographicErr^ e) {
Console::WriteLine(String::Format("Caught exception: {0}", e->Message));
return -1;
}
return 0;
}
|
