S-57 data

More to come

Basics

• Import with v.in.ogr
• There is a some info and links on the Export for GpsDrive wiki page

Obtaining data

Worldwide

• ...

Cananda

• ...

USA

• Free ENCs for the USA from NOAA

(see the Gpsdrive page above)

Accessing S-52 symbology

S-57 is the data format. The S-52 standard contains the standardized coloring and symbology for electronic navigation charts. We want to view the S-57 data through the lens of the S-52 rules. Some ideas for that:

• GRASS interface: (wishlist prototype) display imported S-57 data (v.in.ogr or v.external) using S-52's coloring and layer-order info. Some environment will be information like lighting level and hull depth (start at 0) will be needed

• View with the OpenEV plugin (functional)
• Create the dataviewer as a QGIS plugin (wishlist user app)

libS52

• GPL library
• housed in OpenEV CVS as contrib/S52/

How to build

• Get source code from http://openev.cvs.sourceforge.net/openev/contrib/S52/
• Install build dependencies

Install OpenGL and X11 -dev packages build dependencies. (X11/Xlib.h and GL/gl.h)

PROJ.4 for proj_api.h?

• Build it:

make  # for s52glx simple test program
make default  # for libS52

Run simple s52glx test program

• Edit s52test.conf with the full path to your ENC datafile (*.000 file)
• Run it with ./s52glx and you should see a new window with all layers rendered

OpenEV S52 plugin

• Copy libS52.so to GDAL's lib directory
• Set environment variables

export S57_CSV=/usr/share/gdal
export OGR_S57_OPTIONS="LNAM_REFS:ON,UPDATES:ON,\
SPLIT_MULTIPOINT:ON,PRESERVE_EMPTY_NUMBERS:ON,\
RETURN_LINKAGES:ON"

• test:

openev/openev/gvtest -ogr=../../gpsdrive/ENC_ROOT/US3NY01M/US3NY01M.000

  -OR-

openev/contrib/S52/s52testdyn (s52test.conf will need ENC path ajusted)

Testing

• s52glxsimple

edit S52/s52test.conf with the full path to your downloaded ENC dataset (the .000 file)

• OpenEV plugin