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My other option for Christmas (see "Night Sight" thread :
Message-ID: <[email hidden]>😉
is a GPS unit. I would want it for use in the field, and as an in-car aid.
I have a Compaq iPAQ, so could use one tat works with that.
Any thoughts/ FAQ?
--
Andy Mabbett Reply to [my first name] [at] pigsonthewing.org.uk USA imprisons children
without trial, at Guantanamo Bay: <http://news.bbc.co.uk/1/hi/world/south_asia/2970279.stm>
<web.amnesty.orgENGAMR510582003Open ↗
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Andy Mabbett Reply to [my first name] [at] pigsonthewing.org.uk
USA imprisons children without trial, at Guantanamo Bay:
Why dont you keep this [censored] to yourself ? !
"Andy Mabbett" <[email hidden]> wrote in message =
"]news:[email hidden]...
Quoted message said:My other option for Christmas (see "Night Sight" thread :
=20
Message-ID: <[email hidden]>😉
=20
is a GPS unit. I would want it for use in the field, and as an in-car aid.
=20
I have a Compaq iPAQ, so could use one tat works with that.
=20
Any thoughts/ FAQ?
=20 20
--=20 Andy Mabbett Reply to [my first name] [at] pigsonthewing.org.uk USA imprisons children
without trial, at Guantanamo Bay: <http://news.bbc.co.uk/1/hi/world/south_asia/2970279.stm>
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<DIV><FONT face=3DArial size=3D2>Andy Mabbett Reply to = [my first=20 name] [at]
pigsonthewing.org.uk<BR> <FONT = color=3D#ff0000>USA=20 imprisons children
without trial, at Guantanamo = Bay:<BR></FONT></FONT></DIV>
<><FONT face=3DArial size=3D2></FONT> </DIV>
<><FONT face=3DArial size=3D2></FONT><FONT face=3DArial size=3D2>Why = dont you keep=20 this [censored]
to yourself ? !</FONT></DIV>
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<><FONT face=3DArial size=3D2>"Andy Mabbett" <</FONT><A=20
href=3D""][email hidden]"><FONT face=3DArial=20
size=3D2>[email hidden]</FONT></A><FONT face=3DArial = size=3D2>>=20
wrote in message </FONT><A=20 href=3D""]news:[email hidden]"><FONT
face=3DArial=20 size=3D2>"]news:[email hidden]</FONT></A><FONT =
face=3DArial=20 size=3D2>...</FONT></DIV><FONT face=3DArial size=3D2>> My other = option
for=20 Christmas (see "Night Sight" thread :<BR>> <BR>>=20
Message-ID: <</FONT><A=20
href=3D""][email hidden]"><FONT face=3DArial =
size=3D2>[email hidden]</FONT></A><FONT = face=3DArial=20
size=3D2>>😉<BR>> <BR>> is a GPS unit. I would want it for use = in the=20 field, and as an
in-car<BR>> aid.<BR>> <BR>> I have a Compaq = iPAQ, so=20 could use one tat works with
that.<BR>> <BR>> Any thoughts/ = FAQ?<BR>>=20 <BR>> <BR>> -- <BR>> Andy
Mabbett Reply to = [my first=20 name] [at] pigsonthewing.org.uk<BR>>
USA imprisons =
children without trial, at Guantanamo Bay:<BR>> <</FONT><A=20
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href=3D"web.amnesty.orgENGAMR510582003Open ↗ ENG-USA"><FONT=20
face=3DArial=20 size=3D2>web.amnesty.orgENGAMR510582003Open ↗
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Andy Mabbett said:My other option for Christmas
Probably more useful.
Quoted message said:is a GPS unit.
Try the newsgroup sci.geo.satellite-nav There's a good FAQ and an excellent website (reffed from the
FAQ) that one of the regular posters maintains.
Most GPS are now pretty good, but some are still better than others - especially for mapping, which
is now a near-standard feature. A surprising number have large inaccuracies in their conversion to
GB OS grid refs though, which makes them damn near useless.
--
Die Gotterspammerung - Junkmail of the Gods
In message <[email hidden]>, yup <[email hidden]> writes
Quoted message said:Andy Mabbett Reply to [my first name] [at] pigsonthewing.org.uk USA imprisons children
without trial, at Guantanamo Bay: Why dont you keep this [censored] to yourself ? !
Lucky it's not you this time eh ?
--
geoff
"Andy Mabbett" <[email hidden]> wrote in message
"]news:[email hidden]...
Quoted message said:My other option for Christmas (see "Night Sight" thread :
Message-ID: <[email hidden]>😉
is a GPS unit. I would want it for use in the field, and as an in-car aid.
I have a Compaq iPAQ, so could use one tat works with that.
Any thoughts/ FAQ?
firebond.co.ukitm00018.htmOpen ↗
Andy Mabbett said:My other option for Christmas (see "Night Sight" thread :
Message-ID: <[email hidden]>😉
is a GPS unit. I would want it for use in the field, and as an in-car aid.
I have a Compaq iPAQ, so could use one tat works with that.
Any thoughts/ FAQ?
Does the iPaq have Bluetooth? You can get small (Swan Vesta matchbox sized) bluetooth GPS receivers
that send their data to a connected device like a smartphone or PDA (do a search for "Emtac GPS" for
an example). You then need software on your PDA to process the GPS data stream to do useful things
with it. A neat solution if you are going to use the equipment indoors or in a car.
If you want to use the GPS outdoors for walking, then you're better going with the type of device
you can buy from Field and Trek etc, since these will be weather proofed and have the right sort of
navigation software on them.
tony
In article <[email hidden]>, Andy Dingley
<[email hidden]> writes
Quoted message said:Paul Saunders said:Andy Dingley said:A surprising number have large inaccuracies in their conversion to GB OS grid refs though,
Inaccuracies, yes. Large, no.
1/2km is a bit too big, IMHO.
Can't remember the model, this is a friend's (a Garmin, I think) bought just a few years ago. It
was enough to put us on the wrong side of a woodland when out walking.
That was not due to an error in the GPS conversions to OS grid. The datum transformations are
accurate to a few metres (<10).
Most likely it was due to either poor satellite geometry / obstruction or user error in having the
wrong datum set.
The most common error with setting up a Garmin for use with the OS is to select British Grid
position format but not change the datum to the required Ord Srvy GB from the default WGS-84. That
will lead to an extra 100m of error which is consistent. People also commonly miss read the grid ref
reported by Garmins until they realise that it is a 10 figure ref.
--
<[email hidden]> writes [snip]
Quoted message said:The most common error with setting up a Garmin for use with the OS is to select British Grid
position format but not change the datum to the required Ord Srvy GB from the default WGS-84. That
will lead to an extra 100m of error which is consistent. People also commonly miss read the grid
ref reported by Garmins until they realise that it is a 10 figure ref.
Except, of course, if you have purchased Memory-Map software and OS maps to go with your new Garmin.
Then you need to have the datum in your Garmin set to WGS84.
Quoted message said:
--
Jake
In article <[email hidden]>, jake <[email hidden]> writes
Quoted message said:<[email hidden]> writes [snip]
Quoted message said:The most common error with setting up a Garmin for use with the OS is to select British Grid
position format but not change the datum to the required Ord Srvy GB from the default WGS-84. That
will lead to an extra 100m of error which is consistent. People also commonly miss read the grid
ref reported by Garmins until they realise that it is a 10 figure ref.
Except, of course, if you have purchased Memory-Map software and OS maps to go with your
new Garmin.Then you need to have the datum in your Garmin set to WGS84.
Not for the transfer of waypoints, routes and tracks as these use the Garmin Protocol which always
uses WGS-84 no matter what datum the user has selected in their GPS.
However if you are using a program which takes the real-time NMEA information from the GPS to
display the position on a map you may need to set the GPS datum to WGS-84 in order to have the
position displayed correctly.
--
"Andy Mabbett" <[email hidden]> wrote in message
"]news:[email hidden]...
Quoted message said:My other option for Christmas (see "Night Sight" thread :
Message-ID: <[email hidden]>😉
is a GPS unit. I would want it for use in the field, and as an in-car aid.
I have a Compaq iPAQ, so could use one tat works with that.
Any thoughts/ FAQ?
--
Andy Mabbett
The first step is to look at the FAQ in sci.geo.satellite-nav. There are loads of links.
The choice depends on what you want most. I have a Garmin Vista, which I use for walking & cycling.
It's not an ideal in-car unit (screen too small, likes to be flat so at the wrong angle to see the
screen, no voice-prompt) but its the greatest for walking (small, likes to be flat .... etc). Other
advantages are - batteries last all of a long day's walking, I can make my own maps, accurate, tough
& waterproof.
The iPaq would be way too big and fragile for roughing it, and the battery life is NBG, but may be
good for in-car.
Perhaps both ...!
Jim Hutton
In message <[email hidden]>, Paul Saunders <[email hidden]> writes
Quoted message said:jake said:Except, of course, if you have purchased Memory-Map software and OS maps to go with your new
Garmin.Then you need to have the datum in your Garmin set to WGS84.
No you don't. Garmin units always send and receive data in WGS84 format, no matter what the datum
is set to. Setting the OS datum simply affects the coordinates that are displayed on the unit, not
how they are sent to the software.I don't know about Memory Map, but with Ozi Explorer I set the upload/download datum to WGS84, so
that the data is transferred correctly, but set the map datum to Ordnance Survey, so that the data
is correctly shown on the map.Setting your Garmin to WGS84 will give you incorrect readings.
Paul
--
The October Project 2003 wildwales.fsnet.co.ukoctober.htmlOpen ↗ wilderness-wilderness-Open ↗
wales.co.uk photosig.comuserphotosOpen ↗
Yes. Seems your right.
Just checked. My Garmin Map Datum is set to 'Ord Srvy GB'.
Now when memory-map displays the position where the cursor is sitting, it always appends '(WGS84)'
So a waypoint on a map is SP 75562 54701 (WGS84), but when down-loaded is displayed on the Garmin as
SP 75561 54704.
Hmm ....... must try and understand all this one day ;-)
regards.
--
Jake
In message <[email hidden]>, Paul Saunders <[email hidden]> writes
Quoted message said:jake said:So a waypoint on a map is SP 75562 54701 (WGS84), but when down-loaded is displayed on the Garmin
as SP 75561 54704.Actually that doesn't sound like WGS84, that sounds like the conversion to OSGB inaccuracy that
Andy Dingley mentioned.I've tried inputting a grid ref in WGS84 on my GPS and on OziExplorer, then changing the datum to
OS and they both produce slightly different results. I think Ozi is more accurate because the
conversion in a GPS is relatively simple.I have two highly accurate lists of trig point waypoints in the UK, produced by the OS themselves,
one in WGS84 Lat/Long format, the other in OS BNG format. When I enter the WGS84 waypoint (in
either my GPS or OziExplorer) then switch to OS BNG, the result is different to the OS BNG
coordinates (the OS use a much more complex conversion). The difference is usually only a few
metres, sometimes more, but always less than 10 metres.Paul
--
The October Project 2003 wildwales.fsnet.co.ukoctober.htmlOpen ↗ wilderness-wilderness-Open ↗
wales.co.uk photosig.comuserphotosOpen ↗
I think I'll keep quiet ;-)
--
Jake
My philosophy is it depends what you want the GPS for.
I've used map and compass for years with no problems.
Last November I misstimed my walk from Seathwaite via Honister Pass, Scarth Gap, Blacksail Pass,
Styhead Pass and got "stuck" in foul conditions near Styhead. Discretion being the better part of
valour, I retreated to Wasdale Head where I found an overnight stop. Mrs Buchannans farmhouse B&B is
much recommended.
I bought the GPS to identify waymarks and pinpoint my position in conjunction with map & compass -
not instead of map & compass. It adds a different dimension to walking but my Etrex basic, bog
standard does just what I want - I suppose the message is don't get carried away buying bells &
whistles if all you need is a GPS to tell you where you are.
Mark nowhere near a gasworks will my GPS work in Guantanamo Bay "Andy Mabbett"
<[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:My other option for Christmas (see "Night Sight" thread :
Message-ID: <[email hidden]>😉
is a GPS unit. I would want it for use in the field, and as an in-car aid.
I have a Compaq iPAQ, so could use one tat works with that.
Any thoughts/ FAQ?
--
Andy Mabbett Reply to [my first name] [at] pigsonthewing.org.uk USA imprisons children
without trial, at Guantanamo Bay: <http://news.bbc.co.uk/1/hi/world/south_asia/2970279.stm>
<web.amnesty.orgENGAMR510582003Open ↗
"Andy Mabbett" <[email hidden]> wrote in message
"]news:[email hidden]...
Quoted message said:My other option for Christmas (see "Night Sight" thread :
Message-ID: <[email hidden]>😉
is a GPS unit. I would want it for use in the field, and as an in-car
Compaq iPaq .... night vision binos, GPS .....
better start looking on iwantoneofthose.comiwantoneofthose.comOpen ↗
or boysstuff.co.ukboysstuff.co.ukOpen ↗ or bigboystoyz.co.ukbigboystoyz.co.ukOpen ↗ or gadgetsuk.comgadgetsuk.comOpen ↗
In uk.d-i-y said:I've met people on mountains with a Garmin Etrex (the basic yellow one) reporting a position around
a km wrong.Answer - incorrect setup. The instruction manual is at fault, telling people to use a particular
datum. Quite possibly the correct setting for the USA, but wrong for UK OS maps.
You'll be pleased to hear that no such problem exists with the later Garmin model, the Geko. I've
set up a couple without needing to do anything even slightly hard, and they were both right.
--
Mike Barnes
yup said:USA imprisons children without trial, at Guantanamo Bay:
Quoted message said:Why dont you keep this [censored] to yourself ? !
What's the matter? Does the truth hurt?
--
Phil Cook looking north over the park to the "Westminster Gasworks"
Andy Dingley <[email hidden]> wrote:
<snip>
Quoted message said:A surprising number have large inaccuracies in their conversion to GB OS grid refs though, which
makes them damn near useless.
Which?
Andy Dingley said:A surprising number have large inaccuracies in their conversion to GB OS grid refs though,
Inaccuracies, yes. Large, no.
Quoted message said:which makes them damn near useless.
No.
They were very useful even when SA was on, the conversion inaccuracies are way smaller.
Paul
--
The October Project 2003
wildwales.fsnet.co.ukoctober.htmlOpen ↗
wilderness-wales.co.ukwilderness-wales.co.ukOpen ↗
photosig.comuserphotosOpen ↗
yup said:Andy Mabbett Reply to [my first name] [at] pigsonthewing.org.uk
USA imprisons children without trial, at Guantanamo Bay:Why dont you keep this [censored] to yourself ? !
Pot kettle black - does it really take that much attached junk to say one line?
--
79.84% of all statistics are made up on the spot. The other 42% are made up later on. In Warwick -
looking at flat fields and that includes the castle.
Paul Saunders said:Andy Dingley said:A surprising number have large inaccuracies in their conversion to GB OS grid refs though,
Inaccuracies, yes. Large, no.
1/2km is a bit too big, IMHO.
Can't remember the model, this is a friend's (a Garmin, I think) bought just a few years ago. It was
enough to put us on the wrong side of a woodland when out walking.
--
Die Gotterspammerung - Junkmail of the Gods
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