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
|
// Example of using the GeographicLib::Geohash class
#include <iostream>
#include <iomanip>
#include <exception>
#include <string>
#include <GeographicLib/Geohash.hpp>
using namespace std;
using namespace GeographicLib;
int main() {
try {
{
// Sample forward calculation
double lat = 57.64911, lon = 10.40744; // Jutland (the wikipedia example)
string geohash;
int maxlen = Geohash::GeohashLength(1.0e-5);
for (int len = 0; len <= maxlen; ++len) {
Geohash::Forward(lat, lon, len, geohash);
cout << len << " " << geohash << "\n";
}
}
{
// Sample reverse calculation
string geohash = "u4pruydqqvj";
double lat, lon;
cout << fixed;
for (unsigned i = 0; i <= geohash.length(); ++i) {
int len;
Geohash::Reverse(geohash.substr(0, i), lat, lon, len);
cout << setprecision(max(0, Geohash::DecimalPrecision(len)))
<< len << " " << lat << " " << lon << "\n";
}
}
}
catch (const exception& e) {
cerr << "Caught exception: " << e.what() << "\n";
return 1;
}
return 0;
}
|
