Go Back   Cruiser Log World Cruising & Sailing Forums > Cruising Forums > General Cruising Forum
Cruiser Wiki Click Here to Login

Join Cruiser Log Today

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-21-2011, 08:09 PM   #21
Rear Admiral
 
Coyote's Avatar
 
Join Date: Dec 2008
Home Port: San Jose, CA
Vessel Name: Coyote
Posts: 215
Default

Quote:
Originally Posted by redbopeep View Post

Cloud sourcing and cloud data is all very interesting. However, the result is going to have a great deal of uncertainty in it. Given enough data in a particular location, you will have a reasonable picture of what is going on. However, it will take huge numbers of data points to get a chart reliable enough for use in navigation.

What sort of corrections to GPS data? Are you collecting which GPS system and what triangulation/sat's are in play when the data is being collected? Depth--how will you actually know that the boater is providing you with accurate depth information rather than simply depth below the transducer?

Again, cloud sourcing is a wonderful way to get large and helpful/useful datasets. It isn't necessarily a good way to pin point something with accuracy or precision.
It seems to me that this is a good way to find places where more than usual caution is required. If you have a series of hints that a rock may be a mile north-east of it's charted location, for example, you may choose to take all chart data near it as a hint rather than a fact.

OTOH, a health mistrust of charts is a good idea lots of times anyway.

__________________

__________________
I've Contributed to the Cruisers Wiki: San Diego
Coyote is offline   Reply With Quote
Old 03-22-2011, 01:27 AM   #22
Moderator
 
redbopeep's Avatar
 
Join Date: Jun 2007
Home Port: Washington DC
Vessel Name: SV Mahdee
Posts: 3,236
Default

That series of hints if it came via GPS may simply be an indicator that the GPS datum isn't quite right for the location you're cruising in. If you cruise exclusively using GPS, well then indicators that GPS is "off" in a particular area is good to know.

I have a "healthy mistrust" of people's ability to navigate using GPS. Oftentimes, we are shown via GPS to be quite a distance away from known visible things that I can see: shoreline (GPS has shown me sailing along ON shore many times), channel marker, rock, etc.

What is better, IMHO, is to become good with the paper charts and dead reckoning. But hey, that's just me.
__________________

__________________
"Do or do not. There is no try." - Yoda

What we're doing - The sailing life aboard and the Schooner Chandlery.

redbopeep is offline   Reply With Quote
Old 03-22-2011, 05:16 PM   #23
Rear Admiral
 
Aquaria's Avatar
 
Join Date: Mar 2007
Home Port: Hamburg
Vessel Name: Aquaria
Posts: 281
Default

Quote:
Originally Posted by redbopeep View Post

...

What is better, IMHO, is to become good with the paper charts and dead reckoning.Â*Â*But hey, that's just me.
You are perfectly right and not alone!

This is what we love about sailing: doing the navigation work on real paper charts.

We don't even have a GPS street navigator in our car!

Uwe

SY Aquaria
__________________

__________________
If you have the time, you alwas have the right winds.

More on my Centurion 32:
https://www.cabinetdeparodontologie.n...ria/index.html
I've Contributed to the Cruisers Wiki: Germany, Background, Cruising/Sailing the German Bight
Aquaria is offline   Reply With Quote
Reply

Tags
charts


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
Electronic Charts captainben Regional Discussions 9 04-13-2010 11:06 AM
Digital Ultrosonic Antifouling lynger1 Repairs & Maintenance 0 10-05-2009 11:58 AM
Charts Dodecanesed summercruise Regional Discussions 1 07-30-2009 04:19 AM
Charts rumrunner General Cruising Forum 11 06-09-2005 08:59 PM

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

RV & Travel Trailer Communities

Our RV & Travel Trailer sites encompasses virtually all types of Recreational Vehicles, from brand-specific to general RV communities.

» More about our RV Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


All times are GMT. The time now is 10:06 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.0
×