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#183905 - 03/17/14 03:41 PM Re: What "flavor" your guidebook? [Re: wandering_daisy]
phat Offline
Moderator

Registered: 06/24/07
Posts: 4107
Loc: Alberta, Canada
Originally Posted By wandering_daisy
What Canadian maps do you get on the GPS screen? What is the resolution?


The GPS screen still sucks smile I have been printing them from the same data on paper using a couple of different pieces of software that read the raw ibycus data. on Paper I can plan.

Quote:

Google earth has a GPS generated "route" along the Continental Divide through the Wind Rivers. It is a joke. It also shows a "route" up one hellish drainage. I think they just search the internet for GPS coordinate routes and stick them on the maps, with no ground truth work whatsoever. The internet is a source of 10% very valuable data; 90% trash data. I think Google Earth should stick strictly to showing the images. It is very irritating when they draw a line over a "road" so you cannot really see the road. The images speak for themselves. If you cannot totally verify the lines you put on a map, leave them out!


Everything beyond the map data in Google earth is pretty much user contributed - and that's the problem. half the time user submitted tracks are nowhere near where they should be. Same thing with photos - half the time people tag them nowhere near where they really are (especially with smartphones with horrible gps's) and so what ends up uploaded into the cloud is a bunch of lies wink
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#183926 - 03/18/14 01:27 PM Re: What "flavor" your guidebook? [Re: phat]
Rick_D Offline
member

Registered: 01/06/02
Posts: 2801
Loc: NorCal
Recently took a two-day GIS overview class, which was basically a get-acquainted session with the GIS concept, the ESRI software and the available data bases.

Instructor made the point that people get into trouble sourcing their coordinate points from Google, as it doesn't use a proper projection system and therefore, doesn't match map data when imported. My takeaway is to double-check Google coordinates against another known source before relying on them.

My brain had glazed over by then (day 2, p.m.) so I didn't press him on the point, but hey, at least I remembered it!

To append my earlier comment--I plan my trips using GPS routes created in Topo and exported to my handheld. Route points are printed on the map. Time and again I've found the system invaluable for XC navigation, particulary through woods and over scree. Inevitably, when ascending to a pass in class 3 conditions the route and destination become obscured (convex slope, etc.) and one becomes preoccupied with safe routefinding across and through the boulders. Quick check of the nav screen bearing arrow and distance to the next waypoint tells me what I need to know to continue, while keeping at least one hand in contact.

Cheers,
_________________________
--Rick

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