seldom_sn

But it's still got to have some sampling rate. Otherwise there would be an infinite number of points of zero length in the track. The track/trip odometer sample was an in and out hike with maybe 1/4 mile of side trips on the way in, but as short as possible on the way out. (Water was running low and it was getting hot.) But the odometer to the turn around was 10.1 mi.(agrees with tracklog) and the odometer at the end was 20.3 mi.(tracklog says 19.5).

This was originally placed as an off topic post in the Magellan Explorist thread about the same topic. As I posted there, my Etrex30 tracklog for a trip showed 19.5 miles. My trip odometer showed 20.3 for the same trip. Can anybody explain why this would occur? I would have thought the trip odometer would simply display the totals from the tracklog, but obviously it wasn't. I'm posting this here, because, if answered, it might be of general interest. Also, because Garmin doesn't have forums that deal with the operation of their handhelds or automotive devices, and Garmin's FAQ server crashes whenever I try to put trip odometer, tracklog, and discrepancy in the same query.

Thought you were broadening the topic here. Guess I misunderstood.

Frankly, I thought 5% was too much. Why doesn't the trip computer just display the sum of the tracklog?

See MtnHermit below

A kinda sophisticated question for a geocacheing and consumer grade handheld forum.

Always read them like that on paper, but never thought to on a GPSr. Assuming you compare the photographed lengths, the Legend should be showing about 1/3 more than the 20.

But as you pointed out above there's something different about the zoom levels. 300m is a lot smaller on the Etrex20 than on the Legend. Could there be some conflict with units settings on the 20, like some units are set to feet? It looks like the 20 is showing about a third of distance (9th of area) that the Legend is showing.

Upload your photos to an image hosting site, and then post the links to that site here.

Shouldn't be any problems there. Just bump up your detail settings.

Assume you don't like the Etrex20 display. Make sure you have the detail settings as high on both devices and select the Recreational Profile on the E30. Menu>Setup>Map>Advanced Map Setup>Detail Level does the detail. Setup>Profiles>Recreational does the profiles. What maps are you using?

AFAIK we don't know that zeus661 isn't using a Win7-64 i7 Desktop with 24GB RAM.

Thanks, Team Periwinkle. I can't get your links to work.

Great Bookstore too. But I'm pretty sure that it depends how old "ancient" is. I don't think Odysseus knew he was navigating on an oblate spheroid.

I'm not having any problems with it. What computer and OS are you using? Probably better to ask at the appropriate Garmin forum: https://forums.garmin.com/forumdisplay.php?f=191

Asked this above, but nobody's answered. Do you need to maintain a Birdseye subscription to keep imagery useable on your PC or Mac?

For Garmin compiled maps of the whole world: http://garmin.openstreetmap.nl/ For Topo maps of Europe: http://sites.google.com/site/openfietsmap/ and http://www.opencyclemap.org/ All maps use Openstreetmap data with various enhancements. Looks like Opencyclemap has some costs to download.

Does the following quote from Garmin mean that the only imagery that doesn't expire is the imagery on the GPSr? And that you need to pay to keep imagery on your PC current? If so, I'm glad I haven't subscribed. The first whiff's cheap, the habit could get expensive.

I don't know the format, but they are georeferenced raster graphics, could be GeoTiff or MrSid, or who knows? My point is that Global Mapper, a very handy 400USD piece of software, can open all these formats and many more, and export to the same bunch of raster formats, or even Garmin CustomMaps. I realize that scaling up from what I want to do locally to national or global is an order of magnitude issue, but I reckon that if Garmin can manage a server system to distribute Birdseye, they can manage a system to keep it up to date. Sounds like you were thinking the process was like making CustomMaps from unreferenced data. It's not. All the georeferencing is in the imagery. What did you think the problem was?

Why not? It doesn't look like the data needs to be manipulated, just stored in JNX format. Could you elaborate?

Huh? Ancient sailors thought they were sailing on a flat surface and were worried about what happened when they came to the edge. Except for those who noticed that the ships masts appeared before hulls, and they wouldn't have known how to calculate the circumference unless they read Eratosthenes. (Too bad modern Greek politicians didn't learn how to do the math.)

As Red90 said, you need to take this up with each of the various sources you are getting your maps from. Looks like the two sources you reference are using different Style files, but you'll need to ask them. If you really want to see the data the way you'd like it, learn to download and compile the data using mkgmap.

True, but John E. Cache's point is well taken. To get longitude (since the sphere is spinning) the satellites (or the GPSr) have to be able to associate the fixed point created by the 4 satellites with a longitude on the spinning surface. My guess this is by some atomic clock corrected lookup table (offset local time from Zulu), but I welcome correction.

I don't geocache, so this may be really ignorant, but can't you find an offline app that will do what you want, GSAK maybe? I know you can turn CSVs to Waypoints with GPSbabel, and you can turn CSVs to POI with Garmin's POI loader. Both those run off a local drive.

Very nice! Any way to get it to do taylor999's full string?