+cachercarry Posted January 23, 2003 Share Posted January 23, 2003 I am looking for a new GPS and need some opinions. I would like to find a unit that can be set to read out in feet only. My Mag-315 will only read feet when the mileage to the waypoint drops below .1mi. I am also looking for opinions on best units for accuracy (WAAS?) and use under tree cover. I am not brand specific since I have or have owned units from the big three. I have looked at specs on the sites till I'm crosseyed. I hope that there's a unit out there that meets my needs. Thanks Be verry verry quiet we're hunting caches Quote Link to comment
+Prime Suspect Posted January 23, 2003 Share Posted January 23, 2003 Ain't gonna happen. It would require at least an 8 digit display just for distances within the US. There are plenty of programs available that will do this calculation, based on coordinates entered. Do you have a requirement that this be done in the field? Quote Link to comment
+rayt333 Posted January 24, 2003 Share Posted January 24, 2003 I do not think you are going to find a GPS that uses feet only as a measuringtool. But you can do the math yourself if you just gotta know the distance in feet. 528.5 feet per tenth of a mile, or if you want to round it then go with 525 for a rough guess, if that is too hard to add in your head then round down to 500 feet and use that to make a guessestimation. Quote Link to comment
+Prime Suspect Posted January 24, 2003 Share Posted January 24, 2003 quote:Originally posted by rayt333: But you can do the math yourself if you just gotta know the distance in feet. 528.5 feet per tenth of a mile, or if you want to round it then go with 525 for a rough guess, if that is too hard to add in your head then round down to 500 feet and use that to make a guessestimation. Um, I don't think that was the point. I'm pretty sure the original poster wanted the granularity of measurements in feet. You're method just gives tenth of a mile measurements expressed in a different way. If something is 4460 feet away, that's what they want displayed. With your method, you would have calculated it to be 4224 feet. Quote Link to comment
Forester II Posted January 24, 2003 Share Posted January 24, 2003 The pro models can be set to give all distances in feet(Survey or International). This is a feature I sorely miss in the consumer grades. Also they allow for post processing so some models are able to give centimeter accuracy with Phase correction. I have to project allot of points as part of my job. The best luck I have had is to use meters / Kilometers instead of miles and feet for distances over 528' with the consumer models. Quote Link to comment
Kerry. Posted January 25, 2003 Share Posted January 25, 2003 Feet and miles , does some still use them Forrester II, there's actually some consumer grade (handhelds) that can provide pseudorange and carrier phase for post processing. Not cm level accuracy but since only L1. Cheers, Kerry. I never get lost everybody keeps telling me where to go Quote Link to comment
+Cachetrotters Posted January 25, 2003 Share Posted January 25, 2003 quote:Originally posted by Prime Suspect:.... the original poster wanted the _granularity_ of measurements in feet. Now that's an interesting way to express an interval of measurement. Has a certain savoir-faire flair to it. don Quote Link to comment
+JDan150 Posted January 25, 2003 Share Posted January 25, 2003 I found this little program for the Palm OS that does what you want Point2Point Quote Link to comment
+apersson850 Posted January 25, 2003 Share Posted January 25, 2003 quote:Originally posted by Kerry:Feet and miles , does some still use them Well, I hardly use miles, but I use my feet everyday, to walk here and there... If one set the unit to meters, you do have one meter resolution (granularity!) up to 1000 meters, when it switches to kilometers with one decimal. Anders Quote Link to comment
Forester II Posted January 25, 2003 Share Posted January 25, 2003 Kerry Most of my measurements are still in chains and tallys. Which consumer handhelds? I would like to check them out. Also what kind of accurracy? Quote Link to comment
Kerry. Posted January 25, 2003 Share Posted January 25, 2003 quote:Originally posted by Forester II:Kerry Most of my measurements are still in chains and tallys. Which consumer handhelds? I would like to check them out. Also what kind of accurracy? Yeah, still many old plans over this way in chains/links as well but I betcha you don't use a chain (as of the gunther variety) to measure those chains these days Many of the Garmin 12's, some of the Etrex's and some other garmin receivers can be made to externally record pseudo range (and limited carrier phase) in Rinex. Nottingham University http://www.nottingham.ac.uk/iessg/gringo/ produce a rinex logger called "Gringo" that has been tested with some of these receivers, and there's also a few "Async Logger" similar to http://mywebpages.comcast.net/dmilbert/softs/g12rin.htm Accuracy would probably best be classed as "metre" accuracy but that is of course dependent on baseline distance and reference station accuracy. Cheers, Kerry. I never get lost everybody keeps telling me where to go Quote Link to comment
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