S-57 data: Difference between revisions

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Line 68: Line 68:
* test:
* test:
  openev/openev/gvtest -ogr=/path/to/ENC_ROOT/US3NY01M/US3NY01M.000  
  openev/openev/gvtest -ogr=/path/to/ENC_ROOT/US3NY01M/US3NY01M.000  
-OR-
  -OR-
  openev/contrib/S52/s52testdyn (s52test.conf will need ENC path ajusted)
  openev/contrib/S52/s52testdyn (s52test.conf will need ENC path ajusted)



Revision as of 05:58, 22 April 2008

More to come

Basics

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


How to build

  • 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

  • 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

OpenEV S52 plugin

  • Copy libS52.so to GDAL's lib directory
run ldconfig ?
  • 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=/path/to/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