Weather Routing

[rgleason]

Jon:

Rick, What version of OD and WR are you using? Jon

Good Question. I have updated to
1. Opencpn v4.6.1
2. OD v 1.4 (from your most recent update)
3. WR v 1.10 (one I just recently git fetched and compiled on my laptop & it works)

I made a boundary and checked boundary in WR and found that it works!!! Nice and simple. The boundary is along Nova Scotia shore up to Halifax. It works now, earlier I was getting an error, now with updated software all works fine.
Thank you.

[registry]

Tries all your advices.... it is not working with any boats offered in list of boats...
tried with different dates, detect land - no detect land, modified polar... nothing...
polars do not cover whole range of winds and angles... is it a problem? tried to make it gapless - no success...

tried to get a routing for a positions in north sea miles away from any coast... wind in grib is never zero...

still polar failed...

where can i find and example of correct polar... even if it is a fictional boat ?

[seandepagnier]

Originally Posted by registry

Tries all your advices.... it is not working with any boats offered in list of boats...
tried with different dates, detect land - no detect land, modified polar... nothing...
polars do not cover whole range of winds and angles... is it a problem? tried to make it gapless - no success...

tried to get a routing for a positions in north sea miles away from any coast... wind in grib is never zero...

still polar failed...

where can i find and example of correct polar... even if it is a fictional boat ?

I think you must be configurint something wrong, but if not, post your WeatherRoutingConfiguration.xml, Boat.xml, and grib files.

[rgleason]

Sean as I wrote earlier, any polar that stops short of completing what I call 1/2 a heart, fails!
Please see the "Plugin Polar" thread.

Registry, you must find a polar that defines values from 0 deg to 180 and does not stop short at 50 deg or 150 for example.

[rgleason]

See this post
And go to the link please.
http://www.cruisersforum.com/forums/....php?p=2406543

Sean has pointed out that the WRoute plugin should just sail to these polars that stop short, at 50 to 150 for example, but right now WR just fails!

[rgleason]

USERS: Please note that WxRouting will only work with a full 1/2 heart polar.
Sean has not had time to fix this problem yet!

See other notes about how to change your polar to a full 1/2 heart polar. Under the Plugin Polar thread there is an example spreadsheet.
http://www.cruisersforum.com/forums/...ml#post2403111

I hope WxRouting will be corrected soon!

Also current version does not compile there are errors see Tracker.

[rgleason]

USERS: Please note that WxRouting will only work with a full 1/2 heart polar.
Sean has not had time to fix this problem yet!

See other notes about how to change your polar to a full 1/2 heart polar. Under the Plugin Polar thread there is an example spreadsheet.
http://www.cruisersforum.com/forums/...ml#post2403111

Don't let this trip you up!

I hope weather_routing_pi will be fixed soon. Current version does not compile in Windows.
https://opencpn.org/flyspray/index.p...s&task_id=2239

[hasse_A]

There is a problem with the WeatherRoutingConfiguration.xml file or rather the update of the structure holding the positions.

When you delete a position it disappears from the list but is still written to disk when you close OpenCPN.
The file is written but it contains the newly deleted position so when OpenCPN
is reinvoked the position is read into the data structure and reappears.

Also, if you delete a position and try to create a new with the same name it tells you that one with that name exist and asks if you want to replace it.

All the above tells me that the internal data structure is not handled correct when you delete a position.

I am running WIN7. OpenCPN 4.4.0. Weatherrouting 1.10.1

/Hans

[seandepagnier]

Originally Posted by hasse_A

There is a problem with the WeatherRoutingConfiguration.xml file or rather the update of the structure holding the positions.

When you delete a position it disappears from the list but is still written to disk when you close OpenCPN.

I just tried this, and the position also disappeared from the xml file as expected.

The file is written but it contains the newly deleted position so when OpenCPN
is reinvoked the position is read into the data structure and reappears.

Also, if you delete a position and try to create a new with the same name it tells you that one with that name exist and asks if you want to replace it.

Tried this as well and it didn't ask to replace.

All the above tells me that the internal data structure is not handled correct when you delete a position.

I am running WIN7. OpenCPN 4.4.0. Weatherrouting 1.10.1

/Hans

My weather routing is 1.10.4.

version 1.10.1 doesn't apply the patch which fixed this problem you describe. It has been fixed since november in source anyway, but maybe the plugin is not updated on the download page.

[hasse_A]

Originally Posted by boat_alexandra

My weather routing is 1.10.4.

version 1.10.1 doesn't apply the patch which fixed this problem you describe. It has been fixed since november in source anyway, but maybe the plugin is not updated on the download page.

Yes , I downloaded the plugin from the download pages and it seems to be 1.10.1.

I also got latest from github and tried to build it but got some errors.
Haven't yet put in the effort to sort this out.

Anyhow, I think it would be nice if the download version is updated since I think tis is a rather serious bug.

We are leaving Brazil Monday to go to French Guyana. It would be appreciated to have the fix by then. Otherwise it is necessary to edit the .xml file. Maybe you, boat_alexandra could send an install file to me ?

/Hans

[.Paul.]

As Hans reported, the Windows setup package is version 1.10.1. If I download it using this WGET command:

wget -N -nd http://opencpn.navnux.org/plugins/weather_routing_pi/weather_routing_pi-1.10.1-win32.exe

I get the "weather_routing_pi-1.10.1-win32.exe" with a timestamp of "Sunday, ‎July ‎24, ‎2016, ‏‎01:38:33"--almost eleven months ago.

I used WGET to download the setup package because the Windows Internet browsers timestamp files with the download time.

Paul

[hasse_A]

I am doing weather routing for our crossing from Cabedelo, Brazil to Kourou, French Guyana.

It looks a bit conservative when it comes to the current values. It does not get above 1 knot but looking at other data sources the current north of Brazil will be 2.5 to 3 knots if you position yourself about 100 nm off the coast.

What models are used and how accurate are they ?

Using a professional routing software I have access to gives me currents of 3 to 3.5 knots at times. That is a huge difference. A 2 knot difference makes almost 50 Nm per day.

/Hans

[seandepagnier]

If you are using the climatology currents, forget about it. I think they are conservative anyway, and low resolution and not good close to shore.


Maybe rtofs can work? They seem to be good.

[rgleason]

Hans, I am curious what prof routing software, and what is the data source?
I've been trying to get 3hr interval RTOFS of the Gulf of Maine but only 12hr are available through Saildocs. With tidal influence of 5hr, the interpolation of 12 hr RTOFS is likely to be very wrong.
Would like to find better gribs.

[rgleason]

Sean, I'd like to amend my report about polars needed now. I does not have to be a full 1/2 heart. Just the top part most go to 0. IE there has to be a second line down in the polar file for 0 degrees with zeros under each col for the second row. otherwise the routing won't work.