Facebook

Login

Support Sailonline

If you haven't already - join the SAILONLINE YACHT CLUB!

Please also consider making a donation - all amounts are greatly appreciated!

Board » Technical Support » qTVlm suggestions

Page: Previous 1 2

Posted by
JB


Users avatar

Posts
305
Registered at
2013-03-07 08:54:34
2016-02-26 11:37:05 - Re: qTVlm suggestions
The Madagascar reverse…

I’ve made a normal routing between the Madagascar South tip and the North one obtaining the dark Isochrones field and the path in blue color - pls see attached pic.
From Start to Finish waypoints the routing went along the Madagascar East coast.

After I’ve made a second run for calculating the reverse Isochrones (red color ones) and, to my totally surprise ….. it went along the West coast!

No barriers at all were used for both routing processes.
And, IMHO, it shouldn’t be used as I was calculating the “reverse”, e.g., it should have gone in the opposite direction of the direct routing path, but along the Madagascar East coast.
Or not?

(meanwhile the routing calculations didn’t stop yet….)

Additional info.

TS: 5 minutes.
Angular step: 3,00º.
Scanning angle: 180,00º
Prune angle: 2,00º
Sail Fair.
Attachments
Posted by
maitai


Users avatar

Posts
114
Registered at
2016-02-25 08:15:33
2016-02-26 13:47:28 - Re: qTVlm suggestions
Yes clearly it should have gone on the same side as the normal isochrones, probably a bug here due to the coast configuration. I assumed you used the reversed-isochrone function in routing?

This function is useful to determine zone of incertitude (where the envelop is thin). You can see it as "where would it be best to come from in order to be there?". If the arrival point is in such a zone I suppose the algorithm might get confused so to say, and opt for the wrong side.

--- Dernière modification par maitai le 2016-02-26 13:47:49 ---
Posted by
JB


Users avatar

Posts
305
Registered at
2013-03-07 08:54:34
2016-02-26 15:43:44 - Re: qTVlm suggestions
Viva Philippe.

Yes, the process for generating the "Madagascar reverse" was correct, exactly the same used for generating the one that goes on the attached file - pls have a look on it - in this case with success.

I didn't tried yet, but one way to overcome this "bug" was to use a "vertical" barrier extended to the North of the Finish waypoint (Start waypoint for the reverse) to avoid a reverse routing on the wrong side of the Madagascar Coast.

A Big Hug from here!
Sail Fair.
Attachments
Posted by
maitai


Users avatar

Posts
114
Registered at
2016-02-25 08:15:33
2016-03-04 20:26:01 - Re: qTVlm suggestions
Hello,

AIS module is almost finished and we will open beta testing soon. If some of you are interested to help, just leave a message here (you can test that through brainaid nmea/ais interface).

Fair winds to all
Philippe.
Attachments
Posted by
bucefalo


Users avatar

Posts
15
Registered at
2015-11-19 11:16:52
2016-03-05 08:17:50 - Re: qTVlm suggestions
Ciao Maitai, I have just write on VLM forum, but perhaps this is a better place to test AIS (in vlm other boats are already visible...).

So, I would try to test. I'm not sure if I'm able to (I'm non an IT technician...), but if you want I can try. As you probably know I attend races both here and on vlm.
Cheers
Posted by
maitai


Users avatar

Posts
114
Registered at
2016-02-25 08:15:33
2016-03-15 19:13:01 - Re: qTVlm suggestions
Hello,

I sent you a message at VLM forum with the links to the beta version

Thanks
Philippe
Posted by
bucefalo


Users avatar

Posts
15
Registered at
2015-11-19 11:16:52
2016-03-15 22:45:19 - Re: qTVlm suggestions
ok, thanks maitai. I'll see asap
Posted by
Bimmer


Users avatar

Posts
447
Registered at
2015-02-23 15:38:27
2016-03-22 15:10:24 - Re: qTVlm suggestions
Bucefalo - When you "master" the beta, could you then (here in forum) give us a little "manual" ?

--- Last Edited by Bimmer at 2016-03-22 15:12:17 ---

Page: Previous 1 2

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

Natuna Sea Race 2026


At 4.0N 108.2E lies the island of Natuna Besar, Great Natuna, surrounded by at least 154 islands, of which 127 uninhabited, Indonesia’s Natuna Regency, and all around this archipelago, the Natuna Sea, bordered by Borneo to the east, the Java Sea to the south, and the Malay peninsula to the west, and extending north to cross a disputed international border with China into the South China Sea. And it’s a border that matters, there’s gas here! But why worry, let’s race – 2050nm in our goo’ol’ Open 60s in between the production platforms, prowling destroyers and submarines.
Race #1997
INFOby brainaid.de
Open 60 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Jan 06th 17:00 Registration Open!
▶ Flash
GO TO RACE

Panama Canal 2026


Sailing in the Panama Canal isn't the best idea, and organizing a race there is simply impossible and unfeasible IRL. In SOL, we have slightly different rules, so why not? A 36nm, frantic race awaits us, and the fast Dehler 30 OD will help us navigate the Panama Canal with grace.
Race #1999
INFO by brainaid.de
Dehler30 OD PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
SPQ1 - SPCH - SYC
RACE CLOSE: Wednesday,
January 7 at 2300 UTC.
Race starts: Jan 03rd 13:00 Registration Closed
▶ Flash
GO TO RACE

Tasman Double 2025 - Hobart to Sydney

With Hobart astern and celebrations behind them, the fleet turns north for Leg 2 of our Tasman Double Series. Over 625 nautical miles, our SOLers aboard their mighty Super Maxi 100v2s return to the Tasman Sea, where shifting weather, demanding seas, and nonstop decisions shape every mile. The race back to Sydney rewards those who read the conditions best, manage their speed wisely, and stay focused until the final approach.
Race #2000
INFO by brainaid.de
Super Maxi 100v2 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: TD - SYC
RACE CLOSE: Tuesday,
January 7 at 2300 UTC.
Race starts: Jan 02nd 02:00 Registration Closed
▶ Flash
GO TO RACE

Cape Town to Rio 2026

Welcome to South Africa and RCYC's classic transatlantic Cape2Rio Race from Cape Town, South Africa, to Rio de Janeiro, Brazil. First run in 1971, this run is buddied with the IRL, Cape2Rio 2025 arranged by the Royal Cape Yacht Club with the cooperation of the
Iate Clube do Rio de Janeiro Despite this being announced the 2025 race (starting dec. 27) it is the 2026 SOL championship kickoff. This virtual version, will be raced once again in Mark Mills' 74ft speedster, the stunning C2R74.
Race #1996 INFO
by brainaid.de
C2R74 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
OCQ1 - OCCH - SUPBUD - SYC
Race starts: Dec 27th 12:00 Registration Closed

▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member KaSToR
  2. Sailonline Yacht Club Member WRmirekd
  3. Sailonline Yacht Club Member CriticalHippo
  4. Sailonline Yacht Club Member rafa
  5. Sailonline Yacht Club Member vida
  6. Sailonline Yacht Club Member bonknhoot
  7. Sailonline Yacht Club Member Sax747
  8. Sailonline Yacht Club Member rumskib
  9. Sailonline Yacht Club Member CollegeFund
  10. Sailonline Yacht Club Member Panpyc

View full list

Series

Mobile Client

SYC members have the benefit of access to our mobile/lightweight web client!

The mobile client