Re: [Flightgear-devel] Re : Maritime traffic
On Saturday, December 17, 2011 23:19:16 Stuart Buchanan wrote:
Great work Adrian,
I had something similar working in January - I think I posted
something to this list. My system used an AI scenario to
create a number of ships, and then used a perl script to
query www.marinetraffic.com using the current lon/lat and
write to the property tree the lon/lat speed and heading of
all the ships in a given radius. The difficult thing I found was
that the AIS information wasn't sampled frequently enough.
Let me know if you'd like the scripts and XML I wrote, and I'll
dig them out for you.
To be honest, I was never very happy with my implementation -
it was a bit of a hack. I'd be very interested to hear about the details
of yours, and I'm sure you've thought of something much better!
The ideal might be to push the shipping data onto the MP network,
but the amount of shipping data would swamp our current MP aircraft
numbers :)
-Stuart
Hi Stuart,
I didn't know about you attempt. Your method is probably more advanced, since
I'm just using static data, placing models with a Nasal script executed in the
debug console. I'm not sure if dynamic traffic could be done properly, but
maybe storing at least two points for each ship at any time and moving it
between them at the speed reported through AIS may be a solution. Though, I'm
don't know how useful people would find this, and how much of a performance
hit it would be.
Anyway, I'm attaching the Nasal script I used. The data is just a text file,
containing the type of vessel, position, speed and course. I can send that to
you too, if you want, but it's too large to send to the list.
Cheers,
Adrian
var lat = getprop('/position/latitude-deg');
var lon = getprop('/position/longitude-deg');
var lat_max = lat + 0.5;
var lat_min = lat - 0.5;
var lon_max = lon + 0.5;
var lon_min = lon - 0.5;
var path = getprop(/sim/fg-root) ~ /Nasal/aisdata2.txt;
print( path);
var file = io.readfile(path);
var file_lines = [[]];
var current_word = ;
for (var i = 0; i size(file); i += 1)
{
var char = substr(file, i, 1);
if (char == , or char == \n)
{
append(file_lines[size(file_lines) - 1], current_word);
current_word = ;
if (char == \n) append(file_lines, []);
}
else
{
current_word ~= char;
}
}
foreach(var line; file_lines)
{
var model = ;
if(line[0]==1)
{
model = Models/Maritime/Civilian/MediumFerry.xml;
}
if(line[0]==2)
{
model = Models/Maritime/Civilian/ContainerShip.xml;
}
if(line[0]==3)
{
model = Models/Maritime/Civilian/CruiseShip.xml;
}
if(line[0]==4)
{
model = Models/Maritime/Civilian/Tanker_sailing.xml;
}
if(line[0]==5)
{
model = Models/Maritime/Civilian/Trawler.xml;
}
if(line[0]==6)
{
model = Models/Maritime/Civilian/SailBoatUnderSail.xml;
}
if(line[0]==7)
{
model = Models/Maritime/Civilian/LargeTrawler.xml;
}
if(line[0]==0)
{
model = Models/Maritime/Misc/MarkerBuoy.xml;
}
#var heading = rand() * 360;
var lat_ok =0;
var lon_ok =0;
var height =0;
if(line[3]==0)
{
height=-1;
}
#print(line[0]);
if( (line[2] = lat_max) and (line[2] = lat_min))
{
lat_ok =1;
}
if( (line[1] = lon_max) and (line[1] = lon_min))
{
lon_ok =1;
}
if(lat_ok ==1 and lon_ok==1)
{
#print(line[0]);
geo.put_model(model, line[2], line[1], 0, line[4]);
}
}
--
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Re: [Flightgear-devel] Re : Maritime traffic
On Fri, Dec 16, 2011 at 2:34 PM, Adrian Musceac wrote: On Friday, December 16, 2011 14:57:24 Olivier wrote: Type's already done (sort of), but the foam I have no clue how to get rid of it other than a different model. Some images near Amsterdam harbour: http://i.imgur.com/gNBqS.jpg http://i.imgur.com/7Gpyj.jpg http://i.imgur.com/gxN5L.jpg http://i.imgur.com/StpuV.jpg Crowded, I'd say. Cheers, Adrian Great work Adrian, I had something similar working in January - I think I posted something to this list. My system used an AI scenario to create a number of ships, and then used a perl script to query www.marinetraffic.com using the current lon/lat and write to the property tree the lon/lat speed and heading of all the ships in a given radius. The difficult thing I found was that the AIS information wasn't sampled frequently enough. Let me know if you'd like the scripts and XML I wrote, and I'll dig them out for you. To be honest, I was never very happy with my implementation - it was a bit of a hack. I'd be very interested to hear about the details of yours, and I'm sure you've thought of something much better! The ideal might be to push the shipping data onto the MP network, but the amount of shipping data would swamp our current MP aircraft numbers :) -Stuart -- Learn Windows Azure Live! Tuesday, Dec 13, 2011 Microsoft is holding a special Learn Windows Azure training event for developers. It will provide a great way to learn Windows Azure and what it provides. You can attend the event by watching it streamed LIVE online. Learn more at http://p.sf.net/sfu/ms-windowsazure ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Re : Maritime traffic
Hi, That's a nice start! Are you grabbing data from: http://www.marinetraffic.com/ais/ ? In fact, depending on the data format, you may obtain the speed the type of the ship with AIS. So if speed=0, you should use a ship without wakes (eg ship in a harbour, and display a type depending on the type returned by AIS (cargo, tug, sailing, ...). Oliver -- Learn Windows Azure Live! Tuesday, Dec 13, 2011 Microsoft is holding a special Learn Windows Azure training event for developers. It will provide a great way to learn Windows Azure and what it provides. You can attend the event by watching it streamed LIVE online. Learn more at http://p.sf.net/sfu/ms-windowsazure___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Re : Maritime traffic
On Friday, December 16, 2011 14:57:24 Olivier wrote: Hi, That's a nice start! Are you grabbing data from: http://www.marinetraffic.com/ais/ ? Yes. aprs.fi also has a good feed, although more oriented towards ham radio APRS. AisHub has very detailed NMEA data, but they require you to send a feed before accessing raw data, and I don't live in a coastal area. In fact, depending on the data format, you may obtain the speed the type of the ship with AIS. So if speed=0, you should use a ship without wakes (eg ship in a harbour, and display a type depending on the type returned by AIS (cargo, tug, sailing, ...). Type's already done (sort of), but the foam I have no clue how to get rid of it other than a different model. Some images near Amsterdam harbour: http://i.imgur.com/gNBqS.jpg http://i.imgur.com/7Gpyj.jpg http://i.imgur.com/gxN5L.jpg http://i.imgur.com/StpuV.jpg Crowded, I'd say. Cheers, Adrian -- Learn Windows Azure Live! Tuesday, Dec 13, 2011 Microsoft is holding a special Learn Windows Azure training event for developers. It will provide a great way to learn Windows Azure and what it provides. You can attend the event by watching it streamed LIVE online. Learn more at http://p.sf.net/sfu/ms-windowsazure ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
