S57

Also known as S57. The IHO S-57 format is a vector interchange format used for maritime charts. It was developed by the International Hydrographic Organisation (IHO). For more information about the IHO see: http://www.iho.shom.fr/

File listing

Individual S57 data files have an extension of *.000. For example:

US1BS02M.000

Data Access / Connection Method

  • S57 access in MapServer occurs through OGR, CONNECTIONTYPE OGR must be used.

  • Specify a full path or a relative path from the SHAPEPATH to the .000 file for the CONNECTION

  • Use the DATA parameter to specify the s57 layer name

Special Notes

The underlying OGR code requires two files from your GDAL/OGR installation when reading S57 data in MapServer : s57objectclasses.csv and s57attributes.csv. These files can be found in the /GDAL/data/ folder (unix: /usr/local/share/gdal windows: /ms4w/gdaldata). If you receive an error in MapServer such as:

msDrawMap(): Image handling error. Failed to draw layer named 's57'.
msOGRFileOpen(): OGR error. xxx failed for OGR connection

you may have to point MapServer to these files using the CONFIG parameter in the main section of your map file:

CONFIG GDAL_DATA "C:\ms4w\gdaldata"

OGRINFO Examples

Using ogrinfo on an S57 file to get the layer name:

> ogrinfo us1bs02m.000
ERROR 4: S57 Driver doesn't support update.
Had to open data source read-only.
INFO: Open of `us1bs02m.000'
using driver `IHO S-57 (ENC)' successful.
1: ADMARE (Polygon)
2: CBLSUB (Line String)
3: CTNARE
4: COALNE (Line String)
5: DEPARE
6: DEPCNT (Line String)
7: LNDARE
8: LNDELV
9: LNDRGN
10: LNDMRK
11: LIGHTS (Point)
12: OBSTRN
13: RDOSTA (Point)
14: SEAARE
15: SBDARE
16: SLCONS
17: SOUNDG (Multi Point)
18: UWTROC (Point)
19: WATTUR
20: WRECKS
21: M_COVR (Polygon)
22: M_NPUB (Polygon)
23: M_NSYS (Polygon)
24: M_QUAL (Polygon)
25: C_ASSO (None)

Using ogrinfo to examine the structure of an S57 layer:

    > ogrinfo us1bs02m.000 DEPARE -summary
    ERROR 4: S57 Driver doesn't support update.
    Had to open data source read-only.
    INFO: Open of `us1bs02m.000'
    using driver `IHO S-57 (ENC)' successful.

    Layer name: DEPARE
    Geometry: Unknown (any)
    Feature Count: 297
    Extent: (165.666667, 48.500000) - (180.000000, 60.750000)
    Layer SRS WKT:
    GEOGCS["WGS 84",
DATUM["WGS_1984",
    SPHEROID["WGS 84",6378137,298.257223563]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433]]
    GRUP: Integer (3.0)
    OBJL: Integer (5.0)
    RVER: Integer (3.0)
    AGEN: Integer (2.0)
    FIDN: Integer (10.0)
    FIDS: Integer (5.0)
    LNAM: String (16.0)
    LNAM_REFS: StringList (16.0)
    DRVAL1: Real (0.0)
    DRVAL2: Real (0.0)
    QUASOU: String (0.0)
    SOUACC: Real (0.0)
    VERDAT: Integer (0.0)
    INFORM: String (0.0)
    NINFOM: String (0.0)
    NTXTDS: String (0.0)
    SCAMAX: Integer (0.0)
    SCAMIN: Integer (0.0)
    TXTDSC: String (0.0)
    RECDAT: String (0.0)
    RECIND: String (0.0)
    ...

Map File Example:

LAYER
  NAME s57
  TYPE POLYGON
  STATUS DEFAULT
  CONNECTIONTYPE OGR
  CONNECTION "./s57/us1bs02m.000"
  DATA "DEPARE"
  CLASS
   STYLE
     COLOR 247 237 219
     OUTLINECOLOR 120 120 120
   END
  END
END # Layer