S-57 data

More to come

Basics

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

(see the mailing list posts linked at the end of that page):

http://thread.gmane.org/gmane.comp.linux.gps/3920/focus=3937

http://thread.gmane.org/gmane.comp.linux.gps/3920/focus=3934

Obtaining data

Worldwide

• ...

Cananda

• ...

USA

• Free ENC vector data for the USA from NOAA

http://nauticalcharts.noaa.gov/mcd/enc/download.htm

• Nice previews / chart picker:

http://www.oceangrafix.com/o.g/search-nautical-charts.html

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 CVS

• Install build dependencies

Install OpenGL and X11 -dev packages (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

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

OpenEV S52 plugin

• Copy libS52.so to GDAL's lib directory

putting the lib in /usr/local/lib seems to work.

run ldconfig ?

• Configure OpenEV with render plugin support:

CPPFLAGS='-I/usr/include/gdal' ./configure \
   --with-double-geocoord --with-render-plugin

make

Test S52 plugin with OpenEV

• 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"

• Using gvtest:

./openev/gvtest -ogr=/path/to/ENC_ROOT/US3NY01M/US3NY01M.000 

• Using s52test:

("make s52test" won't compile: problem finding S57_ogr*()?)

(s52test.conf will need ENC path adjusted)

./openev/contrib/S52/s52testdyn

• [??] Using pymod/openev.py:

(Open .000 file, load all layers)

export PYTHONPATH="/usr/lib/python2.4/site-packages/gtk-1.2"
./openev/pymod/openev.py

GRASS S-52 interface for rendering S-57 data

• TODO
• build little command line app to output coloring and layer order info which can be fed to d.vect et al?

QGIS S-52 plugin for viewing S-57 data

• TODO
• anyone have ideas?