Not sure if it's the best deal
I'm not sure if it's the best deal, but as you suggested, it may be easier/cheaper to buy the updated version of Streets and Trips with the add on GPS. I know I plan to do this when I get a laptop (my next vehicle will be equipped with a mount over the passenger seat. I haven't personally used one, but I enjoy streets and trips enough to consider getting the add on GPS too.
-Brad
It's awkward but accurate
I have the Microsoft packet with the GPS antenna. It's accurate but the whole set up is awkward with a laptop. I am assuming I'll take my laptop on any trips I take and using my cell and bluetooth will access my email and perhaps this forum with daily logs(?) I have a Garmin GPS I bought for my bicycle that is terrific but the screen is way too small. It's frustrating because it is so fantastic otherwise. I paid $400 for it. Prior to taking any trips I will pony up for a larger screen portable unit. For my money I'll probably stick with Garmin, I just think their quality is really special.
What you would need is an inverter
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Originally Posted by
holmancv
I don't know all that much about laptops. Can I get a power adapter for my Dell (Or other laptops?) to run it from my auto?
Although most laptops run on D/C (similar to that used by your car) they operate on a different voltage and so you may have seen that bulky part of the A/C cord on your Dell power cord (that is transforming the A/C current into a voltage used by your laptop). Anyway, what you need is an inverter to transform the 12-volt current supplied by your vehicle into A/C and then the laptop can plug in there. Here is a great overview of the type of inverters available.
Mark
Vehicle Power Adaptor for Laptops
I have one of these
It basically allows you to run your laptop from a vehicle without using an inverter. Works well. It can also charge my phone and charged my iPod when I had one. You just buy a new tip for like ~$5-6 for each device. RadioShack sells them also. Have had it for almost 2 years now and love it.
Two things to be cautious when using these devices
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Originally Posted by
jesseschulman
It basically allows you to run your laptop from a vehicle without using an inverter.
Jesse, Thanks for the link. There are two cautions about using these types of products -- which as long as you know about them and don't mind the risk -- are good options for the more expensive inverters/converters....
First is that they are not "truly" universal -- you need to purchase the correct adapter "tip" to plug into the various devices. Second, they provide no line balancing and there is ALWAYS plenty of spare RF and electrical discharges zooming around the powerpoint circuits -- such errant electrical activity can damage sensitive equipment. Which is why I always hook up any of my electrical equipment via a dedicated transformer -- if something untoward happens, the cord is damaged but not the laptop or GPS or etc....
Mark
Garmin Legend handheld GPS unit
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Originally Posted by
Larrison
I use a Garmin Legend handheld GPS unit which I use with TOPO!, the US national USGS map data base. As I drive, the GPS unit logs where I go, and I can download my route and visits to a Topo map of the US. I was able to get 15' topo maps for the whole US for about $50 and for all of California for $50 to the highly detailed 7.5' maps. I typically download specific points of interest and way points from the topo maps to the GPS before I set out, and I've used it to find my way to places in the middle of the night.
That is pretty cool. I have got to try that sometime.
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You can even see my short detour to the mine over look in the liittle town of Ajo if you look closely.
Is there a toggle tool for zooming in on the screen?
Mark
How does it compare with the eTrex Vista?
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Originally Posted by
Larrison
Yes there is. The Garmin handheld I use has a nation-wide data base of major roads, cities and landmarks built into it.
A couple of years ago, Megan bought me a Garmin etrex Vista hand-held GPS and I never could seem to get the hang of using it. How does yours compare with this one? This one shows an accuracy down to 16 feet, but I could never truly duplicate that in the field -- I am reasonably handy with topo maps and I rarely could get the unit to find my location within 100+ yards.
Mark
1 Attachment(s)
Mine seems to work pretty well, and its very similar to yours I think
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Originally Posted by
Editor
A couple of years ago, Megan bought me a Garmin etrex Vista hand-held GPS and I never could seem to get the hang of using it. How does yours compare with this one? This one shows an accuracy down to 16 feet, but I could never truly duplicate that in the field -- I am reasonably handy with topo maps and I rarely could get the unit to find my location within 100+ yards.
Mark
I think mine is pretty close -- I have (if memory serves) an eTrex Legend. I find it works pretty well, and I started as a map & compass orienteering guy. The difference I think is that I start by setting the waypoints I want to find using a computer version of the Topo map, instead of trying to interpolate a position from a paper topo map. (I've found I can also pull a waypoint out of Google Earth as well, using the push pin and just copying the data into the topo waypoint.).
But for repeatability -- leaving a spot, traveling some distance (say 100 miles) and returning -- I've found the GPS handheld unit to give me precision within the error bounds it states. Of course, you can get into situations where you can get different precision levels -- that's dependent upon the number of satellites you see and the WAAS signal. And in one situation I was able to observe multi-pathing which added some error to the signal. (I was in a deep steep sided granite canyon. Since the GPS satellite signals are about microwave frequency, they would reflect off the sheer, flat rock walls of the canyon. As the satellites moved in the sky, you got different reflection paths from their changing geometry, which changed the solution calculated by the GPS. You could actually sit and watch your location change within the error, almost second by second. Pretty bizzare -- and I've only ever seen it once.)
PS -- I added in a close of the recent route through Organ Pipe Cactus National Monument. You can see how the tracked route (GPS unit sitting on my dash, essentially) follows the road in, around the NM Headquarters, then out and back on the Ajo Peak Loop Road. Precision is pretty good followin the topo map landmarks. Scale of this is 1 mile from the legend at the bottom fo the pic.
Alright, I guess I have give it a "go" again
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Originally Posted by
Larrison
I think mine is pretty close -- I have (if memory serves) an eTrex Legend.
yeah, it sounds like they are sister units -- I know she was pretty intense on finding the best unit for me -- but I am still a bit of a luddite and not as willing to tinker endlessly with a piece of gear.
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I find it works pretty well, and I started as a map & compass orienteering guy.
I used to love doing orienteering -- I was a back-country ranger (USFS) for a while and developed a good sense of direction (something I have more-or-less lost in the subsequent years).
I will try it again and offer my own field tests here. 'Course, it sorta requires I get out of the office someday soon... And I don't know when that can be. I am only two hours from Death Valley and it has been months since I was there....
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(I've found I can also pull a waypoint out of Google Earth as well, using the push pin and just copying the data into the topo waypoint.).
Yeah, that is pretty clever.
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You could actually sit and watch your location change within the error, almost second by second. Pretty bizzare -- and I've only ever seen it once.)
We had one of the first-generation GPS units available to the general public back in the early 1990's -- it was huge and the working allowance for errors was about 1/4 mile (and I found it amazing when it could ever find my location in the backcountry).
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PS -- I added in a close of the recent route through Organ Pipe Cactus National Monument. You can see how the tracked route (GPS unit sitting on my dash, essentially) follows the road in, around the NM Headquarters, then out and back on the Ajo Peak Loop Road. Precision is pretty good followin the topo map landmarks. Scale of this is 1 mile from the legend at the bottom fo the pic.
What is the mechanism for getting this print-out (.jpg)?
Thanks again,
Mark
I use Topo! and the map is one of the output options
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Originally Posted by
Editor
[ ... ] What is the mechanism for getting this print-out (.jpg)?
I use the Topo! software sold through National Geographic. Basically its the USGS topo maps, with a fairly poor overlay of some of the large scale National Geographic maps. But the topo maps are very good.
The print out is taken from Topo! I went down to the 7.5' map scale display (which isn't quite accurate, since I only have the 7.5' maps for California, and this if in Arizona), and then did the "Export map to disk" command, which gives me the option of scale, moving the printed area around the map, and exported data format (bitmap, GIF, JPG, etc.) That's all I did, other than resizing the image down for the limiations of the forum (300 pixels any side) -- the original is quite a bit clearer.
I use this, for example, for Boy Scout backpacking trips where I'll print out copies of a specific route we'll take and publish via email specific way points for any of the other adults who have GPS units. I can tailor the topo map coverage as is needed (I used to hate the paper maps, as every trail would cross 2 or 3 sections of the paper topos).
A couple of things to note -- for example, the GPS takes a waypoint and stores the location every minute or two. If you look closely at the map you can sort of see these are the blue waypoints. Then the GPS draws the route between these points -- the red line. Since the waypoints are equally spaced by time when the GPS is on, you can get a pretty good estimation of speed as well from the route map -- closely spaced waypoints are slower, wider spaced are faster. On this map you can note from the clustering of the waypoints where I stopped to take pictures and the cluster on the west side of the monument headquarters where I stopped for lunch in their picnic area.
The GPS signals don't penetrate buildings or cars very well. Moreover, it works by taking the signal from 4 satellites and comparing them -- so if you want a good signal, the GPS really needs to see a good chunk of the sky. Putting the GPS unit on the passenger car seat doesn't work really well. Rather than buying an expensive permanent mounting on the top of the dash, I found that an inexpensive "cell phone holder" which clips onto one of the front dash air conditioning vents works well (about $15 at Radio Shack). It holds the GPS facing me, with the antenna pointed at the sky, looking out the front window with about a half hemisphere view of the sky. And it's very conveniently located to plug into the cigarette lighter for power.
It's been a pretty cool tool. On my recent trip, I had located the location of a place I wanted to stop from Google Earth (a store near Tucson), and we navigated to it using the GPS, since I had forgotten to write down the street address or directions. My traveling companion swore we were on the wrong road, that we needed to stop and turn around, but the GPS unit kept pointing straight ahead and counting down the distance. Yep -- we were on the right road.. and we found the store with the GPS showing an offset of 50' between the waypoint I had put it from the street address in Google Earth, and what was on the GPS unit when I parked in front of the place.
The biggest gripe I have about mine, is it uses an old slow serial cable interface with the computer. The new ones use a USB connection, which should work much faster. But for example, on my last trip the GPS waypoint log was over 5000 waypoints. This took about 20-30 minutes to download using the old, slow serial port transfer. FYI -- the unit showed it was about 50% filled up for waypoints wih the 5000 points (3 days of traveling), but I could have saved that set of waypoints to memory and started another set if I had needed to (I did this traveling to the north end of Vancouver Island and back from SoCal).