I'll forward this from the GpsDrive Mailinglist. Maybe someone is interested in investigating and importing this Datasource ...
---------- Forwarded Message ---------- Betreff: Re: [ gpsdrive ] Nautical maps Datum: Montag 03 März 2008 Von: Hamish <[EMAIL PROTECTED]> An: GPSdrive discussion list <[EMAIL PROTECTED]> Hamish: ... deleted some GpsDrive specific stuff ... > I see no reason why the S-57 vector data could not be integrated into > GpsDrive in the same way OpenStreetMap has been. (NOAA products are > without copyright) Is there a chance (speaking of license) to import these vector Data into openstreetmap. This would even increase the benefit.... > If the maps are license compatible that's not a problem for the NOAA data, like the USA TIGER data which just went into OSM the US Gov't data is without copyright. But that is only true for the US's S-57 navigation data. S-57 is a data format standard published by the International Hydrographic Organisation (IHO). AFAIK other countries are mostly standardizing on the format but their distribution terms are not as nice for us. I think Canada releases theirs (license unknown to me). A quick web search indicates that C-Map's CM-93/3 format appears to be S57 complaint. The IHO's S-52 document states how to render those data features (colors, symbology, etc). Luckily we already have GPL code for that mostly done from OpenEV's S52 plugin. (http://openev.sf.net) > another way could be to add another mapserver to gpsfetchmap. You > normally should only have a look at the other download methods and > from this you normally can add most new ones. AFAIK there is no official online mapserver, just a page you can download .zips of the data. If someone is keen(!), here is how to set one up: http://mapserver.gis.umn.edu/docs/reference/vector_data/S57 It might be very useful to abstract gpsfetchmap to connect to any Open Geospatial Consortium (OGC) WMS server. (NASA's OnEarth server is an example, but there are thousands) http://en.wikipedia.org/wiki/Web_Map_Service (hunt with a websearch for "s-57+mapserver") NOAA apparently provides the S57 images that way already(!): http://ocs-spatial.ncd.noaa.gov/website/encdirect/help/helpfile.htm#Webser "The Open Geospatial Consortium Web Map Service (WMS) protocol defines a simple interface for web based mapping applications. The WMS protocol is based on a simple query syntax for posting a request for the desired layers and region to the server, which returns a map as a standard image (GIF, PNG or other format). The capabilities of a Web Map Service are described in an XML (Extensible Markup Language) document." so maybe it is quite easy? (!) Both QGIS and GRASS have GPL code to connect to WMS servers via http and fetch given data which could be used. You can select your projection and image pixel width+height so we can just ask for LL/WGS84 by EPSG code and 1280x1024 and be 95% of the way there. http://grass.osgeo.org/grass63/manuals/html63_user/r.in.wms.html http://trac.osgeo.org/grass/browser/grass/trunk/scripts/r.in.wms Hamish: > > I see no reason why the S-57 vector data could not be integrated > > into GpsDrive in the same way OpenStreetMap has been. (NOAA > > products are without copyright) Joerg: > Is there a chance (speaking of license) to import these vector Data > into openstreetmap. This would even increase the benefit.... This is a very wonderful idea. I have no involvement in the OSM project, maybe you could raise it? Again for the US supplied data license is not a problem, but NOAA does make it very clear that for navigation at sea purposes they would like you to use the official sources and have them as up to date as possible. If you are steering at night and navigating by a light buoy, and the light has been moved from where it is on your old chart, you could hit a rock, sink, and die. Navigation is a lot riskier when you don't have a road to follow. [the same is true for using old out of date paper charts, of course, and river bars can move with every storm...] That is not to discourage putting the data into OSM, just that it is quite important to build in quality control measures from the start, and have some automated way to incorporate the update patches as they arrive. The S-52 symbology and coloring would ideally need to be built into whatever rendering engine dealt with it. (promote a worldwide standard so mistakes don't arise from failure to translate from localized symbol sets etc) FWIW, if we build in vector map support from GDAL/OGR we instantly get access to the S-57 data format. (but you still need to parse it) that's all for now, Hamish -- Jörg (Germany, Munich) http://www.ostertag.name/ irc://irc.oftc.net/#osm Tel.: +49 89 420950304 Skype: JoergOstertag _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
