IHO S-57 (ENC) Translation
IHO S-57 format is a vector interchange format used for maritime
charts. The only currently common profile is known as ENC (Electronic
Nautical Chart). The format is promulgated by the
IHO (International Hydrographic
I have written an OpenSource library to read S-57 files that is built on my
OGR Simple Features library.
Currently the source is not separately available, but it may be downloaded
as part of the OGR (and GDAL) source, and is found in the
Ready to use S-57 software for windows and Linux can be found in the
FWTools suite. In particular the
ogr2ogr utility can be used to convert S-57 data into other formats such as
shapefiles. For instance, if you were to do the following you would translate
all the features types of us5tx51m.000 into Shapefiles (in the directory
out) with one shapefile per feature type.
C:\Program Files\FWTools0.9.5> ogr2ogr -skipfailures out us5tx51m.000
Be aware that the above will produce a variety of errors and warnings
about feature types with mixtures of geometry types (not supported by the
shapefile format), and the fact that some attributes (such as color lists)
are dropped when writing to Shapefile.
NOTE: I used to have more pointers here, but people keep moving stuff
around so the old links that no longer work have been removed. Feel free
to suggest pointers for S-57 data samples I can add.
I would like to thank the following for their assistance in writing and
debugging my S-57 source code.
- Safe Software who funded my
implementation of the reader, including the underlying ISO8211 library, and
permitted me to release it as Open Source.
- Rodney Jenson (rodney at online.no) who wrote the csv files with all
the object classes and attributes for S-57, and provided moral support.
- Paul Hardy and others from LaserScan who provided background information
for me on the S-57 format.
- Martin Daly of Cadcorp who provided sample files and analysis of some