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

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
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 ---
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
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
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
Hello,

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

Thanks
Philippe
ok, thanks maitai. I'll see asap
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:

Melbourne to Hong Kong
After celebrating Christmas and New Year it is time for the second run in this year's Ocean Race Championship. After leaving Melbourne on this (about) 5.500 NM course, we will leave the Solomon Islands, Papua New Guinea and the Philippines, all to port. And remember, once again we'll have to choose the best way to cross the Doldrums
PRIZE: SMPF
Race #1658
INFOfrom brainaid.de
OD65v3 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
OCQ1-OCCH-SUPSOL-SYC
Race starts: Feb 04th 05:00 Registration Open!

▶ Flash
GO TO RACE

Buenos Aires to Rio 2023

This year's second ARCH series race will run from Buenos Aires, Argentina to Rio de Janeiro, Brazil on a route designed by SOLer Vida_Maldita (under his former alias of zero) in 2013. This is a replica of a classic triennial race of 1200nm, first run in 1947. More information about this IRL race can be found here.
So, Bemvindo/Bienvenidos in this coastal classic and prepare your 90ft Monohulls well.
Race #1662
INFO by brainaid.de
90ft Monohull PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
ARQ1 - ARCH - SUPSOL - SYC
Race starts: Feb 01st 18:00 Registration Open!

▶ Flash
GO TO RACE

Up Helly Aa 2023
A-OI!!! The cry should soon be ringing out in the streets of Lerwick as the Guizer Jarl and his crew, along with the other teams in the Up Helly Aa parade complete their preparations for the biggest fire festival in Europe. As is Sailonline's tradition, we shall be racing the 383nm from Aberdeen to Lerwick to (virtually) take part in the Up Helly Aa festivities there which take place for the first time since 2020 on Tuesday, 31 January. SAILING NOTE: Gruney may be approached from any direction but must be passed for rounding purposes as indicated on the chart.
Race #1660
INFO by brainaid.de
Elan 410 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
RACE CLOSE: Friday,
3 February at 2300 UTC
Race starts: Jan 28th 11:00 Registration Open!

▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member WRmirekd
  2. Sailonline Yacht Club Member Pit8008
  3. Sailonline Yacht Club Member FreyjaUSA
  4. Sailonline Yacht Club Member Vida_Maldita
  5. Sailonline Yacht Club Member Kipper1258
  6. Sailonline Yacht Club Member bonknhoot
  7. Sailonline Yacht Club Member Sax747
  8. Sailonline Yacht Club Member rafa
  9. Sailonline Yacht Club Member SlideRule
  10. Sailonline Yacht Club Member TarassBoulba

View full list

Series

Mobile Client

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

The mobile client