This package provides encoding and decoding of WKB data. The interface is defined as:
func Marshal(geom orb.Geometry, byteOrder ...binary.ByteOrder) ([]byte, error)
func MustMarshal(geom orb.Geometry, byteOrder ...binary.ByteOrder) []byte
func NewEncoder(w io.Writer) *Encoder
func (e *Encoder) SetByteOrder(bo binary.ByteOrder)
func (e *Encoder) Encode(geom orb.Geometry) error
func Unmarshal(b []byte) (orb.Geometry, error)
func NewDecoder(r io.Reader) *Decoder
func (d *Decoder) Decode() (orb.Geometry, error)
This package provides wrappers for orb.Geometry types that implement
sql.Scanner and driver.Value. For example:
row := db.QueryRow("SELECT ST_AsBinary(point_column) FROM postgis_table")
var p orb.Point
err := row.Scan(wkb.Scanner(&p))
db.Exec("INSERT INTO table (point_column) VALUES (?)",
wkb.Value(p))
If you don't know the type of the geometry try something like
s := wkb.Scanner(nil)
err := row.Scan(&s)
switch g := s.Geometry.(type) {
case orb.Point:
case orb.LineString:
}
Scanning directly from MySQL columns is supported. By default MySQL returns geometry data as WKB but prefixed with a 4 byte SRID. To support this, if the data is not valid WKB, the code will strip the first 4 bytes, the SRID, and try again. This works for most use cases.