Re: [OSM-talk] Garmin etrex Vista HCx issue
On 22/08/2010 21:42, Steve Chilton wrote: My new week old Garmin etrex Vista HCx is causing me grief. The power on/off button has decided to not function at all. Am thinking I will have to go to Garmin to resolve it (it was purchased from Amazon). Can't help with the button, but I would just contact Amazon as it's still under guarantee. Under the sales of goods act your contract is with the retailer not the manufacturer when dealing with faulty goods. You are UK based aren't you? Dave F. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin etrex Vista HCx issue
Yes (UK). After talking to a couple of people I have sent it back to Amazon today. Promisingly, the system has already issued a new item request and I have an email saying it has been despatched. So hopefully all will be resolved. STEVE From: talk-boun...@openstreetmap.org [talk-boun...@openstreetmap.org] On Behalf Of Dave F. [dave...@madasafish.com] Sent: Monday, August 23, 2010 10:03 PM Cc: talk@openstreetmap.org Subject: Re: [OSM-talk] Garmin etrex Vista HCx issue On 22/08/2010 21:42, Steve Chilton wrote: My new week old Garmin etrex Vista HCx is causing me grief. The power on/off button has decided to not function at all. Am thinking I will have to go to Garmin to resolve it (it was purchased from Amazon). Can't help with the button, but I would just contact Amazon as it's still under guarantee. Under the sales of goods act your contract is with the retailer not the manufacturer when dealing with faulty goods. You are UK based aren't you? Dave F. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin etrex Vista HCx issue
http://www.gravitystorm.co.uk/shine/archives/2008/11/21/replacement-garmin-etrex-bike-clip/ may be relevant. Shaun On 22 Aug 2010, at 21:42, Steve Chilton wrote: My new week old Garmin etrex Vista HCx is causing me grief. The power on/off button has decided to not function at all. Am thinking I will have to go to Garmin to resolve it (it was purchased from Amazon). Anyone had this issue with theirs? Anyone with good (or bad) experiences of going to Garmin Europe with issues such as this? Anyone with any advice to cheer me up basically?!! Cheers STEVE ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin etrex Vista HCx issue
Steve, My old eTrex Legend packed in completely and Garmin fixed it ok under the guarantee - pretty quick turn around from what I remember. The Zoom out button is playing up on my newer one and I am trying to decide what to do about it because it is well out of guarantee now - I may have to attempt surgery... If it is only a week old and you bought it from Amazon, I would just contact them - i would expect them to exchange it for you rather than getting it repaired. Graham. On 22 August 2010 21:42, Steve Chilton s.l.chil...@mdx.ac.uk wrote: My new week old Garmin etrex Vista HCx is causing me grief. The power on/off button has decided to not function at all. Am thinking I will have to go to Garmin to resolve it (it was purchased from Amazon). Anyone had this issue with theirs? Anyone with good (or bad) experiences of going to Garmin Europe with issues such as this? Anyone with any advice to cheer me up basically?!! Cheers STEVE ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk -- Dr. Graham Jones Hartlepool, UK email: grahamjones...@gmail.com ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin etrex Vista HCx issue
On 22/08/2010 21:42, Steve Chilton wrote: My new week old Garmin etrex Vista HCx is causing me grief. The power on/off button has decided to not function at all. Am thinking I will have to go to Garmin to resolve it (it was purchased from Amazon). Possibly, but I think that it should be the retailer's problem in the first instance (sale of goods act and all that)? Anyone had this issue with theirs? No, but the pointer stick on my first one failed after about 11 months fairly intensive use. Anyone with good (or bad) experiences of going to Garmin Europe with issues such as this? Anyone with any advice to cheer me up basically?!! It went back to to the shop I bought it from*, they leant me a spare, sent mine to Garmin got another back within 2-3 weeks, and I've been using that since. Let's just say that they seemed familiar with the Garmin returns process, but there were no quibbles from either them or Garmin. It just cost me the petrol. Cheers, Andy * Hitch'n'Hike in Bamford. I'm not on commission, but it's worth mentioning good service as well as bad... ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista Hcx
John F. Eldredge wrote: The GPS in my car is a Garmin (I don't recall the exact model at the moment). It appears to be much more accurate when the car is in motion than when the car is stationary. If I power the GPS up with the car stationary, the location given can be inaccurate by 100 meters or more. Once the car starts to move, the GPS can locate the car within 3 or 4 meters. In automotive applications, GPS Units often use a 'snap to road' that makes them look a lot more accurate. My eTrex Vista HCX has two modes of computing headings: one of them is to (i) look at the direction your track is going in and the other is a (ii) built-in magnetic compass. If I'm moving, either in a vehicle or on foot, I find (i) more satisfying than (ii). The most obnoxious thing about altitude on my eTrex is that I don't see how to get it to use GPS altitude instead of barometric altitude. (I know how to pop up a dialog box to ~view~ GPS altitude, but that's it.) Barometric altitude is totally useless if you're inside a pressurized airplane. ;-) In most situations repeatability is pretty good for me; I use tracks for breadcrumb navigation all of the time on foot and rarely see anomalies that cause practical problems. I circumnavigated the BWI airport during a layover the other day and got at the the terminal within 3 minutes of when I thought I would, using GPS data as the major input to my mental calculation. Now, I did get lost in the tunnels of the Library of Congress the day before that... I just need an inertial guidance system for situations like that. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista Hcx
Shalabh schrieb: Would just like to figure out if any of you have had the same issue with this model or any other Garmin GPS. I have a similar Issue with the Garmin Vista HCx. Occasionally I observe, that the GPS position is way off the known road/path I am on. The satellite accuracy is high +-5m. When I switch the device off and on again, it positions me right where I am supposed to be. So it seems to accumulate some sort of error in its internal calculations and needs the occational reset when it is going wrong with great confidence I've never had this problem with my eTrex Vista HCx. The only time I've ever had position errors greater than, say, 15m or so, is when I've first turned the unit on. Whilst it's looking for satellites, the track-log records the current position as where I last turned the unit off for a few seconds until it has a signal lock. However, there might be a couple of causes to large errors; *Some cars are known not to permit very good GPS reception. This would tend to be shown in the +/- position though. *I have heard from others that an earlier version of the software or firmware was known to cause accumulated errors. When I first bought my unit, it was installed with a version previous to these which was fine. I have since upgraded to a later version which is fine. But in general I've never really had any issue with it, other than the rubber part 'ungluing' itself, which is apparently a common fault. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista Hcx
It is probably a fairly common GPS use issue as opposed to a Garmin issue There are many reasons for this not least of which is that all manufacturers lie about the accuracy of their units in real - world use (as opposed to theoretical accuracy tolerances) That is why surveyors and other professionals use specialist high accuracy equipment, tables and have specialist training qualifications to match etc. You can find plenty more info on this by googling, some examples: http://en.wikipedia.org/wiki/Global_Positioning_System http://www.kowoma.de/en/gps/errors.htm http://gpsinformation.net/main/altitude.htm http://www.educatedguesswork.org/2009/03/correcting_for_gps_altitude_er.html The easiest ways for the OSM mapper to minimise this effect are: 1. maximum number of satellites up 2. go on multiple days to minimise daily accuracy variations 3. clearest possible view of the sky 4. average the results 2009/11/2 Apollinaris Schoell ascho...@gmail.com: Nop wrote: Hi! Shalabh schrieb: Would just like to figure out if any of you have had the same issue with this model or any other Garmin GPS. I have a similar Issue with the Garmin Vista HCx. Occasionally I observe, that the GPS position is way off the known road/path I am on. The satellite accuracy is high +-5m. When I switch the device off and on again, it positions me right where I am supposed to be. So it seems to accumulate some sort of error in its internal calculations and needs the occational reset when it is going wrong with great confidence yes this is a Garmin special feature. I believe they do some estimates when reception isn't good. the track is drifting away and suddenly jumps back. switching off and on is an option too. The Vista had a couple of bug fixes in the last firmware updates. Something to try. If you update I recommend to use the native program and not the webupdater if the device is out of warranty. bye Nop ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista Hcx
3. I parked my car near a village a day before, marked a waypoint. The satellite error was at +- 5metres. Today morning, I came back and marked another waypoint. This time the error was +-4 metres but this waypoint is 150 metres off the earlier one. The car keys were with me and I can vouch that my car does not move on its own. :) I haven't tried to calibrate elevation, assuming the GPS altitude has a large error. But I would have expected the altimeter correction to return to the same altitude after returning to the start point. I actually see a 20-50 Meter error after a route of only a few hours. I doubt that the barometric pressure had changed so much during my trip. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista Hcx
Mike, thanks for the response. I would like to clarify that the 150 metres error is a (x,y) distance error. There is an additional altitude error of around 70 meters. Regards, Shalabh On Sat, Oct 31, 2009 at 9:51 PM, Mike N. nice...@att.net wrote: 3. I parked my car near a village a day before, marked a waypoint. The satellite error was at +- 5metres. Today morning, I came back and marked another waypoint. This time the error was +-4 metres but this waypoint is 150 metres off the earlier one. The car keys were with me and I can vouch that my car does not move on its own. :) I haven't tried to calibrate elevation, assuming the GPS altitude has a large error. But I would have expected the altimeter correction to return to the same altitude after returning to the start point. I actually see a 20-50 Meter error after a route of only a few hours. I doubt that the barometric pressure had changed so much during my trip. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista Hcx
I have never seen this type of x,y error except in the case of being downtown with large buildings, or in the case of some obstruction. In your case, it could be that there is an obstruction of a tree/mountain within the horizon view that blocks a different set of satellites at a different times of day. (Just guessing). Normally a re-survey of an area results in a max 2-4 Meter error with this same device. From: Shalabh Sent: Saturday, October 31, 2009 12:44 PM To: Mike N. Cc: talk@openstreetmap.org Subject: Re: [OSM-talk] Garmin eTrex Vista Hcx Mike, thanks for the response. I would like to clarify that the 150 metres error is a (x,y) distance error. There is an additional altitude error of around 70 meters. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista Hcx
No matter how good signal you have there is always a chance that the given position is wrong without limitations. So when talking of a satellite error of +-5 meters that actually means that with 95% probability the error is +-5 meters. The possible error in the last 5% is limitless, and my guess is that you were hitting that last 5%. (Last week my GPS, which is not a Garmin, placed me on the north pole +-20 meters for 5 seconds before returning me to a more sane position. The probability such misreading to appear should be very, very low.) As Mike wrote, this is more likely to happen under trees, near large buildings or other obstacles. If you return a third time you should get a position that is very close to one of the first two. Konrad 2009/10/31 Shalabh shalab...@gmail.com: [...] 3. I parked my car near a village a day before, marked a waypoint. The satellite error was at +- 5metres. Today morning, I came back and marked another waypoint. This time the error was +-4 metres but this waypoint is 150 metres off the earlier one. The car keys were with me and I can vouch that my car does not move on its own. :) [...] ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista Hcx
The GPS in my car is a Garmin (I don't recall the exact model at the moment). It appears to be much more accurate when the car is in motion than when the car is stationary. If I power the GPS up with the car stationary, the location given can be inaccurate by 100 meters or more. Once the car starts to move, the GPS can locate the car within 3 or 4 meters. -- John F. Eldredge -- j...@jfeldredge.com Reserve your right to think, for even to think wrongly is better than not to think at all. -- Hypatia of Alexandria -Original Message- From: Konrad Skeri kon...@skeri.com Date: Sat, 31 Oct 2009 18:08:58 To: talk@openstreetmap.org Subject: Re: [OSM-talk] Garmin eTrex Vista Hcx No matter how good signal you have there is always a chance that the given position is wrong without limitations. So when talking of a satellite error of +-5 meters that actually means that with 95% probability the error is +-5 meters. The possible error in the last 5% is limitless, and my guess is that you were hitting that last 5%. (Last week my GPS, which is not a Garmin, placed me on the north pole +-20 meters for 5 seconds before returning me to a more sane position. The probability such misreading to appear should be very, very low.) As Mike wrote, this is more likely to happen under trees, near large buildings or other obstacles. If you return a third time you should get a position that is very close to one of the first two. Konrad 2009/10/31 Shalabh shalab...@gmail.com: [...] 3. I parked my car near a village a day before, marked a waypoint. The satellite error was at +- 5metres. Today morning, I came back and marked another waypoint. This time the error was +-4 metres but this waypoint is 150 metres off the earlier one. The car keys were with me and I can vouch that my car does not move on its own. :) [...] ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista Hcx
Hi! Shalabh schrieb: Would just like to figure out if any of you have had the same issue with this model or any other Garmin GPS. I have a similar Issue with the Garmin Vista HCx. Occasionally I observe, that the GPS position is way off the known road/path I am on. The satellite accuracy is high +-5m. When I switch the device off and on again, it positions me right where I am supposed to be. So it seems to accumulate some sort of error in its internal calculations and needs the occational reset when it is going wrong with great confidence bye Nop ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista Hcx
Hi! Shalabh schrieb: Would just like to figure out if any of you have had the same issue with this model or any other Garmin GPS. I have a similar Issue with the Garmin Vista HCx. Occasionally I observe, that the GPS position is way off the known road/path I am on. The satellite accuracy is high +-5m. When I switch the device off and on again, it positions me right where I am supposed to be. So it seems to accumulate some sort of error in its internal calculations and needs the occational reset when it is going wrong with great confidence bye Nop All of the matters described are possible at all times with a GPS system of position finding. However the notes that some accumulate errors are significant, and again may refer to particular firmware so that it will be difficult to determine the actual cause. 150m horizontal error, for example, across a time gap of a few hours, may well relate to changes in satellite position and reflection of signal occurring one one but not both times. Vertical errors are greater at all times. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista Hcx
ed...@billiau.net wrote: Hi! Shalabh schrieb: Would just like to figure out if any of you have had the same issue with this model or any other Garmin GPS. I have a similar Issue with the Garmin Vista HCx. Occasionally I observe, that the GPS position is way off the known road/path I am on. The satellite accuracy is high +-5m. When I switch the device off and on again, it positions me right where I am supposed to be. So it seems to accumulate some sort of error in its internal calculations and needs the occational reset when it is going wrong with great confidence bye Nop All of the matters described are possible at all times with a GPS system of position finding. However the notes that some accumulate errors are significant, and again may refer to particular firmware so that it will be difficult to determine the actual cause. 150m horizontal error, for example, across a time gap of a few hours, may well relate to changes in satellite position and reflection of signal occurring one one but not both times. Vertical errors are greater at all times. Also, a) if road snap if not defeated it may snap you to a different position, with only a small change in measured position, and b) some of the more sensitive auto GPSrs will lock your position, when you aren't moving (or aren't moving very fast) until position changes up to 100 meters, to avoid showing a lot of drift on the display. This could be the reason for better accuracy while moving. This is added to the design because receiver sensitivity has improved so much that the receiver will pick up sats at very low signal to noise ratio, and consequent larger timing (and therefore position) errors. I guess the theory is that it's better to display an inaccurate stationary position than a wandering one, not something I agree with. These are more likely the reason for the issue Shalabh described. The position has been frozen at an inaccurate point, and when the GPS power is cycled, it comes back up with a good lock and resets the position based on the new measurement. I would doubt an error buildup just because GPS fixes are based on discrete fixes, rather than any kind of incremental measurements. However, I believe one of the purposes of the different modes (auto, cycle, walking) in some Garmins is to adjust for these two situations, so you need to make sure you are in the correct mode for what you are doing. -- Randy ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista Hcx
On Sat, 2009-10-31 at 21:45 +, Randy wrote: These are more likely the reason for the issue Shalabh described. The position has been frozen at an inaccurate point, and when the GPS power is cycled, it comes back up with a good lock and resets the position based on the new measurement. I would doubt an error buildup just because GPS fixes are based on discrete fixes, rather than any kind of incremental measurements. I have a trace which fits the profile of an accumulated error. The attached screenshot shows several NaviGPS traces in JOSM for the section of motorway around the M25, M3 junction. One trace is clearly offset by up to 300m for a significant period of time. http://www.openstreetmap.org/?lat=51.40094lon=-0.53633zoom=15layers=B000FTF Jon attachment: gps-offset.png___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista HCx - maps from openstreetmap
Niklas Cholmkvist wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, what formats can I put on the micro sd card for this device to read? So far I've managed to put a gpx file (which I converted from osm data using JOSM), in it. I thought it would use the gpx file as a map. Can that be done? See http://wiki.openstreetmap.org/wiki/OSM_Map_On_Garmin -- Chris Jones, SUCS Admin http://sucs.org ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Garmin eTrex Vista HCx - maps from openstreetmap
Hi, what formats can I put on the micro sd card for this device to read? So far I've managed to put a gpx file (which I converted from osm data using JOSM), in it. I thought it would use the gpx file as a map. Can that be done? See also http://wiki.openstreetmap.org/wiki/GroundTruth - generates maps for Garmin GPS units using OpenStreetMap data and NASA's SRTM digital elevation model Roman ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
