29 lines
531 B
Go
29 lines
531 B
Go
|
package geojson
|
||
|
|
|
||
|
|
import "fmt"
|
||
|
|
|
||
|
|
func decodeBoundingBox(bb interface{}) ([]float64, error) {
|
||
|
|
if bb == nil {
|
||
|
|
return nil, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
switch f := bb.(type) {
|
||
|
|
case []float64:
|
||
|
|
return f, nil
|
||
|
|
case []interface{}:
|
||
|
|
bb := make([]float64, 0, 4)
|
||
|
|
for _, v := range f {
|
||
|
|
switch c := v.(type) {
|
||
|
|
case float64:
|
||
|
|
bb = append(bb, c)
|
||
|
|
default:
|
||
|
|
return nil, fmt.Errorf("bounding box coordinate not usable, got %T", v)
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
return bb, nil
|
||
|
|
default:
|
||
|
|
return nil, fmt.Errorf("bounding box property not usable, got %T", bb)
|
||
|
|
}
|
||
|
|
}
|