47                    | - G
50                    | - P
0                       - version
5                       - flags (Little Endian & envelope type 2)
27700                   - SRS   (OSGB 1936)
637590.385            | - min_x  -|
642426.601            | - max_x   |
309577.58             | - min_y   |-  envelope
310361.391000001      | - max_y   |
0                     | - min_z   |
0                     | - max_z  -|
1                       - StandardGeoPackageBinary encoding (Little Endian)
1005                    - StandardGeoPackageBinary  type (MultiLineString Z)
34                      - Number of LineStrings

-----

27700.000000 642426.601000