Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 15-05-2019, 13:14   #1681
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 12,568
Re: Weather Routing

Quote:
Originally Posted by kevinvh View Post
Anyone know when the Weather_Routing_Pi will be available for OpenCPN 5.0.0 for Mac? Is there anything else that would prevent me running Weather Routing on OpenCPN 5.0.0 for Mac.

I am running OpenCPN 4.8.8 for Mac and the Weather Routing plugin works really great on it - proved invaluable sailing around French Polynesia. Do I need to do a clean install of v 5.0.0 or can I write over the top of v 4.8.8?

Kevin,
Just do a parallel install and be able to run both versions. Then when you get comfortable remove v4.8.8

I have about 3-4 versions for testing. v4.2 v4.8.8 v50
__________________

rgleason is online now   Reply With Quote
Old 16-05-2019, 06:12   #1682
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 12,568
Re: Weather Routing

Grib Issue "Feature Request" posted here https://github.com/seandepagnier/wea..._pi/issues/248



Quote:
Originally Posted by Flaviotti View Post
Hello,

I begin saying how much I admire this plugin. It's UI are outstanding and, more importantly, its features tremendously interesting.

I have done some testing with a pol file that is hard coded to 5kts for every situation, to be able to follow the logic and troubleshoot the routes, and my question is about currents calculations.

It seems that for some reason it fails to factor in the current to the route speed.
In this picture, the route position displays the point where the boat is going through a patch of current of .6kts to pretty much the same direction of the boat heading, but the displayed speed for that point is still 5kts. I would expect something around 5.5kts.
Attachment 192098

The climatology plugin displays correctly the current on the chart.
The weather routing setting included climatology's current as most probable.
Attachment 192099
Is anyone able to see whether I am missing something, or is a bug worth reporting?

Thanks and again: awesome work with this plugin!
__________________

rgleason is online now   Reply With Quote
Old 16-05-2019, 08:56   #1683
Registered User

Join Date: Jun 2015
Posts: 338
Re: Weather Routing

Quote:
Originally Posted by Flaviotti View Post
Hello,

I begin saying how much I admire this plugin. It's UI are outstanding and, more importantly, its features tremendously interesting.

I have done some testing with a pol file that is hard coded to 5kts for every situation, to be able to follow the logic and troubleshoot the routes, and my question is about currents calculations.

It seems that for some reason it fails to factor in the current to the route speed.
In this picture, the route position displays the point where the boat is going through a patch of current of .6kts to pretty much the same direction of the boat heading, but the displayed speed for that point is still 5kts. I would expect something around 5.5kts.
Attachment 192098

The climatology plugin displays correctly the current on the chart.
The weather routing setting included climatology's current as most probable.
Attachment 192099
Is anyone able to see whether I am missing something, or is a bug worth reporting?

Thanks and again: awesome work with this plugin!
In my understanding it's working, sort of, in the dialog box it's SOW not SOG... you can double check with the Measure tool.
did-g is offline   Reply With Quote
Old 16-05-2019, 09:40   #1684
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 12,568
Re: Weather Routing

Thank you Didier for the clarification.

Is there some way to make this clearer that you can think of?
rgleason is online now   Reply With Quote
Old 16-05-2019, 09:56   #1685
Registered User

Join Date: Oct 2014
Posts: 203
Re: Weather Routing

Flaviotti, rgleason,

Weather_routing_pi works with wind GRIBs from NOAA and currents from Climatology_pi.

Here is a screen shot showing a weather routing from Saint Andrew Bay (Panama City, FL) to Miami.
Click image for larger version

Name:	Weather_Route.png
Views:	26
Size:	226.9 KB
ID:	192169

The Weather Route Report indicates
Code:
Average Speed Over Water (SOW): 5.50 knots
Average Speed Over Ground (SOG): 5.83 knots



6.04% speed change due to favorable currents.
Paul
.Paul. is offline   Reply With Quote
Old 16-05-2019, 12:20   #1686
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 12,568
Re: Weather Routing

Good point .Paul. Didier also confirms this.


Thinking about how to make this clearer to the user,
perhaps the "Boat Speed" that he underlined in red should be


"Boat Speed STW or SOW" ?
rgleason is online now   Reply With Quote
Old 16-05-2019, 14:30   #1687
Registered User

Join Date: Jun 2015
Posts: 338
Re: Weather Routing

Quote:
Originally Posted by rgleason View Post
Good point .Paul. Didier also confirms this.


Thinking about how to make this clearer to the user,
perhaps the "Boat Speed" that he underlined in red should be


"Boat Speed STW or SOW" ?
You can test PR
https://github.com/seandepagnier/wea...ng_pi/pull/249
Attached Thumbnails
Click image for larger version

Name:	WR route.png
Views:	24
Size:	38.4 KB
ID:	192184  
did-g is offline   Reply With Quote
Old 19-05-2019, 02:32   #1688
Registered User

Join Date: Apr 2012
Location: Port Steven, NSW, Australia
Boat: Van der Stadt Samoa 48
Posts: 141
Re: Weather Routing

Hi,
I am sitting in Gan on The Maldives trying to find a good weather window to Seychelles. The main joker in this game is the squeals and thunderstorms. You can get a good indication where they will come by looking at CAPE. It would be usefull to have CAPE shown along the route for evaluation in weather routing.

Lars
Taarnskov is online now   Reply With Quote
Old 20-05-2019, 03:26   #1689
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 12,568
Re: Weather Routing

Lars,
I think what we want is REFC.
Please see this post from David Burch, Starpath Navigation.
New Grib Presentation
" simulated radar reflectivity (REFC) is a better parameter for predicting squalls than CAPE,..."

"... NWS switches GFS to FV3-GFS on June 12. After that date GFS will include REFC globally."

"...resolve the color bar[for REFC] as there is a standard one for this. Europe and US are slightly different, but the European one is better."
Perhaps Didier can add REFC to the report when the model starts including it? ...but it won't help you in the Maldives now. Sorry.

Quote:
Originally Posted by Taarnskov View Post
Hi,
I am sitting in Gan on The Maldives trying to find a good weather window to Seychelles. The main joker in this game is the squeals and thunderstorms. You can get a good indication where they will come by looking at CAPE. It would be usefull to have CAPE shown along the route for evaluation in weather routing.

Lars
rgleason is online now   Reply With Quote
Old 20-05-2019, 03:55   #1690
Registered User

Join Date: Apr 2012
Location: Port Steven, NSW, Australia
Boat: Van der Stadt Samoa 48
Posts: 141
Re: Weather Routing

I know it will not help me now, but in the future. I hope it will help other sailors too.

Lars
Taarnskov is online now   Reply With Quote
Old 20-05-2019, 04:07   #1691
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 12,568
Re: Weather Routing

Quote:
Originally Posted by did-g View Post

Didier, I tested the plugin you reference above. Oddly, the SOG and SOW do not show together as in your screenshot. Do I need to adjust a setting?


Well I turned on average speed and average speed ground. (I don't think these settings control the "Route Positon" Panel. I believe they control the parameters shown in the Configurations area.


Then I discovered several things:
1. Weather_routing seems to favor the left panel. Properly showing the isochrones as they are created. The right panel is not drawn until the route is completed.
2. Grib_pi seems to favor the right panel, showing the grib wind indications in that panel only.
3. Climatology_pi seems to do any panel that has been activated, and then the Wind Roses show.
4. When "View > Route Position" is activated and hover over Climatology sourced data/isochrones the SOG and SOW show on various isochrones, but not all of them. Some are left out, - is this because of interopolation?
5. When "View > Position" is activated and hover over Grib sourced data/isochrones the Boat Speed SOG is the only parameter that seems to show.


Can someone please confirm this and report back using Didier's appveyor "Artifact Tab" build of the plugin above?
https://ci.appveyor.com/project/sean...5223/artifacts



Screeenshots below taken from various route positions.


BTW: I think resolution of which canvas (left or right) and how climatology, grib and weatherrouting work together needs some discussion, thought and resolution, which would be a separate "Issue". I will post this.
Attached Thumbnails
Click image for larger version

Name:	Screenshot (85).jpg
Views:	20
Size:	428.3 KB
ID:	192374   Click image for larger version

Name:	Screenshot (86).jpg
Views:	14
Size:	436.0 KB
ID:	192375  

Click image for larger version

Name:	Screenshot (87).jpg
Views:	14
Size:	432.4 KB
ID:	192376   Click image for larger version

Name:	Screenshot (88).jpg
Views:	16
Size:	441.0 KB
ID:	192377  

rgleason is online now   Reply With Quote
Old Yesterday, 11:30   #1692
Registered User

Join Date: Jun 2015
Posts: 338
Re: Weather Routing

Quote:
Originally Posted by rgleason View Post
Didier, I tested the plugin you reference above. Oddly, the SOG and SOW do not show together as in your screenshot. Do I need to adjust a setting?



BTW: I think resolution of which canvas (left or right) and how climatology, grib and weatherrouting work together needs some discussion, thought and resolution, which would be a separate "Issue". I will post this.
Don't know if it's a good idea but it displays both only if they aren't the same.


Yeh, canvas handling needs some thoughts in many plugins.



Is Wiindows rendering still half broken?
did-g is offline   Reply With Quote
Old Yesterday, 14:38   #1693
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 12,568
Re: Weather Routing

Oh, really? That was not clear to me. Would it be clear to others I wonder?
Of course it might be a good feature or convenience, because it saves checking two values, and the difference is very noticeable. I will put a note in the manual about this, lets keep it. Good idea.

Quote:
Don't know if it's a good idea but it displays both only if they aren't the same.

FAQ in Weather_routing Wiki

https://opencpn.org/wiki/dokuwiki/do...ion_boat_speed
rgleason is online now   Reply With Quote
Old Yesterday, 14:49   #1694
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 12,568
Re: Weather Routing

Quote:
Yeh, canvas handling needs some thoughts in many plugins.
Agreed, it will become clearer what is needed with time.


Quote:
Is Wiindows rendering still half broken?

Nope, not from my end. Seems pretty stable.
__________________

rgleason is online now   Reply With Quote
Reply

Tags
paracelle, weather

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yachts in transit - new system for weather, blogging, diving, walking tracking sail-fish Navigation 13 22-05-2016 15:57
SSB Weather info VirtualVagabond General Sailing Forum 8 15-01-2016 08:40
Optimum SSB/satphone combo setup tulsag Marine Electronics 33 30-04-2012 07:19
MaxSea Weather Routing Revelations Weather | Gear, Reports and Resources 12 10-10-2011 01:08
Sea Myths and Sayings Mariners The Sailor's Confessional 5 29-09-2011 13:51



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:49.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.