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WebAgents Occasional Visitor
Joined: Jun 12, 2004 Posts: 37
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Posted: Thu Jun 17, 2004 7:29 am Post subject: Off Road (on canal ) maps and usage |
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Hi,
I want to be able to use an Ipaq 2210 on the canal to pinpoint my position and my speed but I'll handle the navigation (pun intended).
What's the best way of doing this with regard to s/ware and maps?
(Never used an Ipaq or satnav before).
Regards
BH |
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WebAgents Occasional Visitor
Joined: Jun 12, 2004 Posts: 37
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Posted: Thu Jun 17, 2004 7:31 am Post subject: And before you ask... |
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I'm in the UK |
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Darren Frequent Visitor
Joined: 11/07/2002 14:36:40 Posts: 23848 Location: Hampshire, UK
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Posted: Thu Jun 17, 2004 7:40 am Post subject: |
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Memory-Map. I used their 1.50000 maps on a boating holiday on the Norfolk Broads last year and it was great fun, you can switch the measurement units to Knots and it alos draws a vector line which can be configured to show where you will be in a set time, i.e. 10mins which is useful for planning stops etc.
MM also saves the journey as a track visible on Map so you can review your routes. The software comes with PC and PocketPC clients and the maps can be used on both. See our GPS Software/Topographical section for more info.
I recommended this very solution to a reader who was heading off to the Broads and he reported back that it worked very well. _________________ Darren Griffin |
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spile Regular Visitor
Joined: May 08, 2004 Posts: 163
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Posted: Thu Jun 17, 2004 7:10 pm Post subject: |
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This was discussed in uk.rec.waterways last week. One of the subscribers uses GPS on the inland waterways.
Never seen the point myself! |
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Darren Frequent Visitor
Joined: 11/07/2002 14:36:40 Posts: 23848 Location: Hampshire, UK
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Posted: Thu Jun 17, 2004 7:14 pm Post subject: |
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Admittedly there is no need for one but it adds to the fun and you can use the OS maps to reference things that you pass etc. _________________ Darren Griffin |
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WebAgents Occasional Visitor
Joined: Jun 12, 2004 Posts: 37
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Posted: Fri Jun 18, 2004 9:37 am Post subject: canal use |
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Most canal boats don't have odometers but most canal have speed limits. GPS can help you know your actual speed.
Maps are still useful as boats need fuel stations as well. Also, it can be quite handy knowing where takeaway POI's are as we are meant to be relaxing after all ;)
Regards
BH |
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icsys Frequent Visitor
Joined: Feb 20, 2004 Posts: 1154 Location: South Lancashire, UK
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Posted: Fri Jun 18, 2004 11:21 am Post subject: |
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Go for it WebAgents
What is the point of anything if you start to think about it. _________________ Ian.
iPAQ 2210 | Navman 4100 BT Receiver
Navman iCN 635
TomTom GO
Anquet OS mapping
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spile Regular Visitor
Joined: May 08, 2004 Posts: 163
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Posted: Fri Jun 18, 2004 10:18 pm Post subject: |
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Using GPS to measure speed on a canal?!!!!!
This of course would be next to useless. Far better to look at your wash. |
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alix776 Pocket GPS Moderator
Joined: 03/05/2003 14:45:49 Posts: 3999 Location: leyland lancs ENGLAND
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Posted: Fri Jun 18, 2004 10:22 pm Post subject: |
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they dont go that fast do they
5 hours =15 minute walk doesnt it
im kidding i think msot canals are on tt3 so you could us it but not to navigate as it were _________________ currently using aponia truck navigation on windows phone. Good bye IOS don't let the door hit you on the way out .
Oh the joys of being a courier.
device Lumia 950 xl |
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WebAgents Occasional Visitor
Joined: Jun 12, 2004 Posts: 37
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Posted: Sat Jun 19, 2004 11:27 am Post subject: |
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bl wrote: | Using GPS to measure speed on a canal?!!!!!
This of course would be next to useless. Far better to look at your wash. |
Once you know what your wash looks like at the maximum speed, yes, but as all boats/props etc. etc. result in different washes a starting point is neccessary.
Regards
BH |
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spile Regular Visitor
Joined: May 08, 2004 Posts: 163
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Posted: Sun Jun 20, 2004 8:07 pm Post subject: |
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Quote: | Once you know what your wash looks like at the maximum speed, yes, but as all boats/props etc. etc. result in different washes a starting point is neccessary. |
No.
If you are breaking wash, you are going too fast.
That is all you need to know. That is is your starting point.
Knowing your exact speed (which no GPS will give you anyway) is completely usless on the inland waterways. |
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WebAgents Occasional Visitor
Joined: Jun 12, 2004 Posts: 37
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Posted: Sun Jun 20, 2004 9:06 pm Post subject: |
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Quote: | If you are breaking wash, you are going too fast.
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Not if your wash is not damaging the banks or disturbing other boats etc.
Anyway, that's my last canal speeding related post in this thread as it's way off topic.
Thanks for pointing out that GPS won't give me an accurate speed anyway.
How accurate is it accepted to be (relating to speed)?
Regards
BH |
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Darren Frequent Visitor
Joined: 11/07/2002 14:36:40 Posts: 23848 Location: Hampshire, UK
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Posted: Sun Jun 20, 2004 9:18 pm Post subject: |
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Given a constant speed and altitude, GPS calculated speed is more accurate tham most other speedometers. _________________ Darren Griffin |
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icsys Frequent Visitor
Joined: Feb 20, 2004 Posts: 1154 Location: South Lancashire, UK
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Posted: Mon Jun 21, 2004 12:43 am Post subject: |
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WebAgents wrote: | How accurate is it accepted to be (relating to speed)?
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I read somewhere that speed (when constant) from commercial GPS is accurate to around 0.05 m/sec or 1/10th mph
That's pretty exact to me
And here's an interesting statement I came across:
GPS is clearly the best navigation system available to boaters, but it does have limitations, especially the low speed effects caused by selective availability (SA). When selective availability is "turned off" by DOD, the sooner the better, boaters can expect a dramatic increase in low speed accuracy.
I believe that SA was turned off May 2000. _________________ Ian.
iPAQ 2210 | Navman 4100 BT Receiver
Navman iCN 635
TomTom GO
Anquet OS mapping
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DavidW Pocket GPS Moderator
Joined: 17/05/2003 02:26:21 Posts: 3747 Location: Bedfordshire, UK
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Posted: Mon Jun 21, 2004 1:21 am Post subject: |
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Whilst I can't confirm the date off the top of my head, Selective Availability (SA) was discontinued permanently some years ago.
The US DoD have said that they now have other, more localised denial of service systems they can use, making the global reintroduction of SA unnecessary. As such, the US Government have committed themselves not to use global SA again.
David |
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