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GPS
When it comes to computers and the net, I've been on the cutting edge- but
when it comes to GPS, I've been Luddite- not wanting to think of another thing to spend money on that I could live without. But, recently another forester in the area gave me a demonstration of his GPS unit and how it can interact with the Mass. GIS Maptech program which has all the topo maps of Mass. on CD and a fine program to view that stuff- which is GIS compatible. But as I look at the models available, I'm not sure what to buy. One feature on the better ones that looks indispensable is a digital compass! Any suggestions? Anyone using them regularly? Is GPS really as good as it sounds or are there things you don't like about it? I'd like to find one that will help me find beatifull, rich, available women. G -- Joe Zorzin http://www.forestmeister.com |
#2
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GPS
Is GPS really as good as it
sounds or are there things you don't like about it? With all brands, have a backup plan for the day. You never know when the satellites will stop cooperating with your unit. It is especially frustrating when doing a large, complicated traverse to have the thing stop taking points when you are almost done. Even the expensive Trimbles with software predicting prime satellite reception seems mostly fiction. |
#3
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GPS
Jerry Mohlman wrote:
Is GPS really as good as it sounds or are there things you don't like about it? With all brands, have a backup plan for the day. You never know when the satellites will stop cooperating with your unit. It is especially frustrating when doing a large, complicated traverse to have the thing stop taking points when you are almost done. Even the expensive Trimbles with software predicting prime satellite reception seems mostly fiction. I'd highly recommend lurking on the sci.geo.satelite-nav group for a while. It's a bit garmin-centric but well stocked with gps pros. It's a complex field. Just finding out if you're where WAAS reception is good makes a big difference. Until you get into the high-end of gps, you'll probably still be working in the 3 meter uncertainty range. NOT good enough for a traverse but OK for finding most features which would make it onto a quad and definitely good enough to locate yourself on an orthophoto. The mapping part of gps is a bit of a misnomer. Very few units are any good at making maps, though most of the new ones have a map in them with varying degrees of usefulness. They're best at street locations, even driving directions. There not worth much off the road. The better ones are based on Tiger line files and aren't well suited for foresters needs. And location of babes was left out of all the models I'm familiar with. |
#4
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GPS
"Joe Zorzin" wrote in message ...
But as I look at the models available, I'm not sure what to buy. One feature on the better ones that looks indispensable is a digital compass! Any suggestions? Anyone using them regularly? Is GPS really as good as it sounds or are there things you don't like about it? I'd like to find one that will help me find beatifull, rich, available women. G You're right about one thing, they all have a tonne of bells and whistles. I use one on a daily basis at work, usually for tracking down hotspots from IR scans, or keeping track of equipment caches and pump sites. You'll see a lot of figures quoted as far as accuracy goes, but if you can get within 50 ft of the spot you're looking for, you're generally doing really good. Sometimes they are even more accurate than that. We had a hell of a time this summer on one fire though, it seems that the military was screwing with the system while things were going down in Afghanistan. Our rides were having a hard time finding our helipads that we got dropped off at; coordinates would change over our shift. A couple of other things to watch out for: Map datum: make sure everyone is one the same page, or you might find yourself a ways of course; and navigational units: usually have the between several sets of units, again, make sure you're on the same page as your GIS or others you are getting coordinates from (dd mm ss / dd mm.mm / dd.mm) But that's small biscuits, just things to be aware of. They are handy, no doubt. The digital compass is something that we didn't bother with. Just take the bearing off the GPS unit and use your magnetic compass. It's hard to shoot a line with the GPS unit, and you tend to walk with your head down looking at the screen, which leads to a not-so-straight transect through the woods. As you pick up and lose satellites, the bearing will even change as the new sats get lumped into the calculation, leading to even more wiggly walks. We used several different models by Garmin and Magellan... I personally preferred all of the Garmin models over the Magellan. As for all the rich, beautiful women, you'll find them he 45 degrees 58.446 minutes N 66 degrees 43.102 minutes W good luck! Scott |
#5
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GPS
Any suggestions? Anyone using them regularly? Is GPS really as good as it
sounds or are there things you don't like about it? Joe, I sprang for a Garmin Legend last fall. I now consider it indespensible. It goes everywhere with me just like the compass and loggers tape. I find that when used with the Maptech product I save a lot of time locating parcels in the boonies. No more hunting for 'K' tags or wondering where section lines cross the road. It really helps to buy Garmin's topo map set to download to the GPS. The basic information in the machine provides little or no help any distance from major roads (blank screen). You still need maptech though, for land net because the garmin map product has no section info. May not make any difference in your area because of the lack of a public land survey. If you get one you'll be hooked and save time. You can transfer field info to the maps from the GPS with much greater accuracy than scetching. My experience has been that the unit is pretty damn accurate ... in the range of 1/2 chain if used carefully. One very cool thing is, if you do good office setup, no more pacing and measuring distance. You just go to the point. Don't pay for a compass. Your silva is probably better and easier to use. Besides, as long as you're moving, the GPS gives you a heading. Have fun. They're a great tool. Every forester should have one. You'll get hooked. The units are around $200 and the mapping packages $100 apiece. Larry |
#6
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GPS
"LRLake" wrote in message ... Any suggestions? Anyone using them regularly? Is GPS really as good as it sounds or are there things you don't like about it? Joe, I sprang for a Garmin Legend last fall. I now consider it indespensible. It goes everywhere with me just like the compass and loggers tape. I find that when used with the Maptech product I save a lot of time locating parcels in the boonies. No more hunting for 'K' tags or wondering where section lines cross the road. It really helps to buy Garmin's topo map set to download to the GPS. The basic information in the machine provides little or no help any distance from major roads (blank screen). You still need maptech though, for land net because the garmin map product has no section info. May not make any difference in your area because of the lack of a public land survey. If you get one you'll be hooked and save time. You can transfer field info to the maps from the GPS with much greater accuracy than scetching. My experience has been that the unit is pretty damn accurate ... in the range of 1/2 chain if used carefully. One very cool thing is, if you do good office setup, no more pacing and measuring distance. You just go to the point. Don't pay for a compass. Your silva is probably better and easier to use. The compass feature is the one I'm most concerned about. As you say, it may not be all that usefull, especially for those of us who have used a hand compass for a long time. My understanding from doing some reading is that there are 2 type of GPS compass- the simpler type just simulated a compass by the info it gets from the satellittes. The others are a genuine compass which will work even if you can't get a satellitte signal. With the Garmin 76S Map unit, the unit must be held vertically to get a signal so that kind of negates having a compass built in as to see the compass you want to hold it horizontally. The Magellan Platinum's built in compass is "3 axis" so you can hold it anyway whithout losing the signal. I'm tempted to spend extra to get the compass since if I don't, I'll probably find out later that I wish I had. My main interest in the GPS is to locate cruise plots. Locating them with hand compass and pacing really sucks. Radio Shack has Magellan and they have a 30 day no questions asked return policy. Best Buy carries Garmen but I didn't think to ask about a return policy. I really don't mind spending a lot for a very usefull tool. When I buy computers, I buy the top of the line- it's worth it. Besides, as long as you're moving, the GPS gives you a heading. Have fun. They're a great tool. Every forester should have one. You'll get hooked. The units are around $200 and the mapping packages $100 apiece. I've got Maptech on my computer- too bad no GPS can download Maptech contour map info (of course they can dowload points and tracks, etc.)- you have to buy the map software that the GPS company sells. Nice little after market gimick! Larry |
#7
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GPS
Joe Zorzin wrote:
"LRLake" wrote in message ... Any suggestions? Anyone using them regularly? Is GPS really as good as it sounds or are there things you don't like about it? Joe, I sprang for a Garmin Legend last fall. I now consider it indespensible. It goes everywhere with me just like the compass and loggers tape. I find that when used with the Maptech product I save a lot of time locating parcels in the boonies. No more hunting for 'K' tags or wondering where section lines cross the road. It really helps to buy Garmin's topo map set to download to the GPS. The basic information in the machine provides little or no help any distance from major roads (blank screen). You still need maptech though, for land net because the garmin map product has no section info. May not make any difference in your area because of the lack of a public land survey. If you get one you'll be hooked and save time. You can transfer field info to the maps from the GPS with much greater accuracy than scetching. My experience has been that the unit is pretty damn accurate ... in the range of 1/2 chain if used carefully. One very cool thing is, if you do good office setup, no more pacing and measuring distance. You just go to the point. Don't pay for a compass. Your silva is probably better and easier to use. The compass feature is the one I'm most concerned about. As you say, it may not be all that usefull, especially for those of us who have used a hand compass for a long time. My understanding from doing some reading is that there are 2 type of GPS compass- the simpler type just simulated a compass by the info it gets from the satellittes. The others are a genuine compass which will work even if you can't get a satellitte signal. With the Garmin 76S Map unit, the unit must be held vertically to get a signal so that kind of negates having a compass built in as to see the compass you want to hold it horizontally. The Magellan Platinum's built in compass is "3 axis" so you can hold it anyway whithout losing the signal. I'm tempted to spend extra to get the compass since if I don't, I'll probably find out later that I wish I had. My main interest in the GPS is to locate cruise plots. Locating them with hand compass and pacing really sucks. Radio Shack has Magellan and they have a 30 day no questions asked return policy. Best Buy carries Garmen but I didn't think to ask about a return policy. I really don't mind spending a lot for a very usefull tool. When I buy computers, I buy the top of the line- it's worth it. The magellan compass is functional but IS NOT the same as that ol' Silva ranger. Depending on the settings, the heading might be the direction you are walking, ie. the last several track points averaged. You can set it to operate like a hand compass, but the shape and angle you hold it at don't really lend themselves to the same uses. After getting the magellan I've found that there are a few things the 76S probably does better - things like an altimeter that actually reads altitude, rather than averaging it with what the database says ought to be elevation. After you get used to the ins and outs of the different datums, you might realize - you just want to know what's real... Also, the Magellan base map software, Mapsend Topo, is pretty good. It's still based on tiger files though, which often mislocate country roads and rivers. Streets are OK though. |
#8
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GPS
Mike, which Magellan do you have, the Platinum? What are "tiger files"? I
think the only way I'm going to know which to buy is to buy both, then return the lesser of the two. How does inclement weather effect GPS? -- Joe Zorzin http://www.forestmeister.com "mhagen" wrote in message ... Joe Zorzin wrote: "LRLake" wrote in message ... Any suggestions? Anyone using them regularly? Is GPS really as good as it sounds or are there things you don't like about it? Joe, I sprang for a Garmin Legend last fall. I now consider it indespensible. It goes everywhere with me just like the compass and loggers tape. I find that when used with the Maptech product I save a lot of time locating parcels in the boonies. No more hunting for 'K' tags or wondering where section lines cross the road. It really helps to buy Garmin's topo map set to download to the GPS. The basic information in the machine provides little or no help any distance from major roads (blank screen). You still need maptech though, for land net because the garmin map product has no section info. May not make any difference in your area because of the lack of a public land survey. If you get one you'll be hooked and save time. You can transfer field info to the maps from the GPS with much greater accuracy than scetching. My experience has been that the unit is pretty damn accurate ... in the range of 1/2 chain if used carefully. One very cool thing is, if you do good office setup, no more pacing and measuring distance. You just go to the point. Don't pay for a compass. Your silva is probably better and easier to use. The compass feature is the one I'm most concerned about. As you say, it may not be all that usefull, especially for those of us who have used a hand compass for a long time. My understanding from doing some reading is that there are 2 type of GPS compass- the simpler type just simulated a compass by the info it gets from the satellittes. The others are a genuine compass which will work even if you can't get a satellitte signal. With the Garmin 76S Map unit, the unit must be held vertically to get a signal so that kind of negates having a compass built in as to see the compass you want to hold it horizontally. The Magellan Platinum's built in compass is "3 axis" so you can hold it anyway whithout losing the signal. I'm tempted to spend extra to get the compass since if I don't, I'll probably find out later that I wish I had. My main interest in the GPS is to locate cruise plots. Locating them with hand compass and pacing really sucks. Radio Shack has Magellan and they have a 30 day no questions asked return policy. Best Buy carries Garmen but I didn't think to ask about a return policy. I really don't mind spending a lot for a very usefull tool. When I buy computers, I buy the top of the line- it's worth it. The magellan compass is functional but IS NOT the same as that ol' Silva ranger. Depending on the settings, the heading might be the direction you are walking, ie. the last several track points averaged. You can set it to operate like a hand compass, but the shape and angle you hold it at don't really lend themselves to the same uses. After getting the magellan I've found that there are a few things the 76S probably does better - things like an altimeter that actually reads altitude, rather than averaging it with what the database says ought to be elevation. After you get used to the ins and outs of the different datums, you might realize - you just want to know what's real... Also, the Magellan base map software, Mapsend Topo, is pretty good. It's still based on tiger files though, which often mislocate country roads and rivers. Streets are OK though. |
#9
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GPS
Joe Zorzin wrote:
Mike, which Magellan do you have, the Platinum? What are "tiger files"? I think the only way I'm going to know which to buy is to buy both, then return the lesser of the two. How does inclement weather effect GPS? -- Joe Zorzin I've got the Platinum with a 64 MG flash card and the Topo cd. I'm only using ~32 MG and fit nearly half the state of Washington in. That's a lot of contour lines. With a software upgrade, you can back up routes to the card. It's a fine gadget, though if it also contained a cell phone and an espresso maker it'd also be cool. TIGER files are an older GIS line file type that was used for the nationwide scale census maps. They aren't as accurate as USGS DRG's and occasionally do odd things such as drawing rivers running over hills and roads. They seem to be in all the commercial map databases. The most basic drawback of any recreational gps is that you can't input your own base maps. The drawbacks of the Meridian are that batteries only seem to last about 8 hours if it's on the whole time, there's no "area" function (there is in most garmins), and the elevation reading is a blend of actual and datum elevation. (not a bad thing if you have varying barometric pressure) The 76S is a better tool, but not that much better. There are ways to get around the limitations of the meridian. When I download the tracks into say, Mapmaker or Terrain tools, I can compute area and minor errors in elevation are not a problem. The temptation is to ignore the fuzziness of the actual data points. |
#10
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GPS
Joe I used the original garmin etrek with my laptop and maptech
software. Its cool. You can be driving down a road anf tell pretty close when you cross a section line using the th 1:24,000 topos which show section lines. I can do tracks and throw them up on the laptop and calculate area. This christmass I stepped up to the etrek Legend. It allows you to do area calculations on it without using the laptop. The compass function burns alot of battery power. They advertise the etrek as 22 hours of battery time but it aint going to happen. I dont see the point of the electronic compass. The legend is on the internet at 198$ and if the rebates havent expired you can get a 50$ rebate. i bought 2. They have a base map and all kinds of other bells and whistles. The legend has WAAS but I have never got it to lock onto that sattellite. I think they have to be numbered 35 or so higher. The etrek only carry two batteries but you get a computer cable with the legend. The auto power adapter is like 35$. Why did you think a digital compass is invaluable. I like to set gps to "goto" the north pole"calculated" as I never been there and then I can tell my magnetic variance for where I am at. You just have to move a little to get a reading. Compasses are too cheap to want to burn batteries on your GPS IMHO.On Sun, 16 Feb 2003 04:19:29 -0500, "Joe Zorzin" wrote: When it comes to computers and the net, I've been on the cutting edge- but when it comes to GPS, I've been Luddite- not wanting to think of another thing to spend money on that I could live without. But, recently another forester in the area gave me a demonstration of his GPS unit and how it can interact with the Mass. GIS Maptech program which has all the topo maps of Mass. on CD and a fine program to view that stuff- which is GIS compatible. But as I look at the models available, I'm not sure what to buy. One feature on the better ones that looks indispensable is a digital compass! Any suggestions? Anyone using them regularly? Is GPS really as good as it sounds or are there things you don't like about it? I'd like to find one that will help me find beatifull, rich, available women. G -- Joe Zorzin http://www.forestmeister.com |
#11
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GPS
I hear that we had a parcel noone had been on since it was bought in
1963. Our forsters couldnt find it but I popped the lines using maptech and had all the corners plotted and just walked it with my etek. The maptech topos are old but that helps find old churches and graveyards that might get dropped on the new topos when they come out. I find that when used with the Maptech product I save a lot of time locating parcels in the boonies. No more hunting for 'K' tags or wondering where section lines cross the road. I dont have garmis software. How does it help you if it doesnt show section lines? Section lines are the greatest thing about maptech. It really helps to buy Garmin's topo map set to download to the GPS. The basic information in the machine provides little or no help any distance from major roads (blank screen). You still need maptech though, for land net because the garmin map product has no section info. May not make any difference in your area because of the lack of a public land survey. I agree My Legend eats batteries. Its a pain to have to carry them and as soon as you forget you are powerless, figuratively and literally. My old original etrek does better on battery life but the screen is 1/2 the resolution and cant calculate area, or all the cellestial stuff. The etrek with the compasses just spit the batteries out and burp. a waste. I think you get a barometer too on the one with the compas and a bunch of stuff for pilots. If you stay in your vehicle with a power cord you'll be alright but if not carry lots of duracells Don't pay for a compass. Your silva is probably better and easier to use. Besides, as long as you're moving, the GPS gives you a heading. Have fun. They're a great tool. Every forester should have one. You'll get hooked. The units are around $200 and the mapping packages $100 apiece. Larry |
#12
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GPS
Well, I'm beginning to get a grip on this subject.
It looks like the built in compass isn't worth it- and it runs the batteries down. I have a very nice Suunto compass I've had for over 20 years and it's very accurate. Apparently the digital compasses in GPS units are at best only good to within 2 degrees. My Suunto is good to probably half a degree. I need to be able to install top map info from the CDROMs sold by the company, either Garmin or Magellan. So, some memory is needed- but since I'm only working on one property at a time and mostly not more than a few hundred acres, I don't need a vast amount of memory. The Legend has 8 megs which ought to be sufficient for a few hundred acres. The batteries lasting a full day is important. Having road maps of the nation and nautical stuff and a barometer is of no concern to me. Cost is important although I'll pay more for useful features. After I finish work on each property, I could easily reset the unit as I'll be storing the data on my Maptech on my Dell and/or laptop. So, as of the moment it looks like the Garmin Legend is the best bet. The Ben Meadows catalog has it for $235 and there is a $50 rebate offer in effect until July. If I buy at Best Buy, there is a 30 day return policy. JZ |
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