Licensing options for this format begin with FME Desktop Professional Edition.
Note: This chapter also contains information applicable to the Additional Military Layers (AML) reader.
Overview
The S-57 Reader module provides FME with access to data in International Hydrographic Organization (IHO) S-57 formatted file sets.
While any S-57 dataset should be supported, this reader has only been fully tested with S-57 Electronic Navigational Chart (ENC) profile products. Note that S-57 Editions 3.0 and 3.1 are supported.
The S-57 format is a standard published by IHO and more information can be found at:
Some aspects of an S-57 transfer, such as data quality information, is not accessible via the S-57 reader, however, a user well-versed in the S-57 format can extract it using the ISO8211 reader.
Reader Overview
The S-57 Reader module produces FME features for all S-57 features in one or more related S-57 data files. An S-57 dataset can be an S-57 catalog file (in which case, all files referred to from the catalog are selected), or an individual S-57 data file.
S-57 feature objects are translated into FME features. S-57 geometry objects are automatically collected and formed into geometries on the features. Geometry objects are not separately accessible with the S-57 reader.
The reader supports S-57 update files. S-57 update files contain information on how to update a distributed S-57 data file. Update files have a file extension of 001, 002, etc.
Soundings
Depth soundings are handled somewhat specially in the S-57 format to efficiently represent the many available data points. In S-57, one sounding feature can have many sounding points.
The FME S-57 reader splits each sounding point into its own feature type, SOUNDG feature, with an s57_type of s57_point3d.
All soundings from a single feature record have the same AGEN, FIDN, FIDS, and LNAM values.