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
44
45
46
47
48
49
50
51
52
53
54
|
package geo_test
import (
"fmt"
"github.com/paulmach/orb"
"github.com/paulmach/orb/geo"
)
func ExampleArea() {
poly := orb.Polygon{
{
{-122.4163816, 37.7792782},
{-122.4162786, 37.7787626},
{-122.4151027, 37.7789118},
{-122.4152143, 37.7794274},
{-122.4163816, 37.7792782},
},
}
a := geo.Area(poly)
fmt.Printf("%f m^2", a)
// Output:
// 6073.368008 m^2
}
func ExampleDistance() {
oakland := orb.Point{-122.270833, 37.804444}
sf := orb.Point{-122.416667, 37.783333}
d := geo.Distance(oakland, sf)
fmt.Printf("%0.3f meters", d)
// Output:
// 13042.047 meters
}
func ExampleLength() {
poly := orb.Polygon{
{
{-122.4163816, 37.7792782},
{-122.4162786, 37.7787626},
{-122.4151027, 37.7789118},
{-122.4152143, 37.7794274},
{-122.4163816, 37.7792782},
},
}
l := geo.Length(poly)
fmt.Printf("%0.0f meters", l)
// Output:
// 325 meters
}
|
