I have a Blackberry and it knows where I am
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Roger Wright wrote:
What I really want is one of these[^]!
They are nice, we have two for surveying. But the garmin is still handy because it is faster and more portable -- with the external antenna we get 2 meter accuracy and can take it anywhere. Plus with the magnetic mounting, we can put the antenna on things to measure their location, even 20feet in the air. :)
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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Yup, but it's pricey. We use sub-foot GPS for surveying on the reservation, but that requires a base station and presurveyed benchmarks. For a handheld, this baby is the best value I've found. There's a model that's even more accurate, but the price goes up significantly.
"A Journey of a Thousand Rest Stops Begins with a Single Movement"
Roger Wright wrote:
but the price goes up significantly.
I would say that is pretty near an understatement. The price goes up near exponentially!
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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David Cunningham wrote:
submeter GPS
yes, but phones are not usually satellite based GPS, although the math is the same, the distances are less. GPS is based on multiple satellite signals being received, combined with distance and location, you get a rough location via overlapping spheres. Elevation is the most difficult. The more horizon satellites the more accurate your location is. The more satellites in the solution, the more accurate your location is. My Garmin generally provides 6ft(2m) with WAAS, 12-18ft without WAAS. Most phones use overlapping cellular tower signals for location, and some use it as a WAAS to improve satellite location. The process is the same, and the message/calculations are the same, but the transport is via the cell. Cross-timings for distance/location are much easier from surface to surface than from orbit to surface.
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
I understand but didn't realize that it had evolved to that point yet.
David
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I understand but didn't realize that it had evolved to that point yet.
David
David Cunningham wrote:
I understand but didn't realize that it had evolved to that point yet.
Actually it did when the cellular companies figured out that they could use all those overlapping cells (even competitors and roam signals) as triangulation signals. It was in everyone's best interest to embed the same signal, though a few debated on changing it, still they would loose out on taking advantage of others.... so in the end it was settled, everyone used the same signal, so you are picking up all the cells on the same wavelength even from competitors for locating. :) when you loose signal, you loose position, unless you have one that also does satellite based GPS position. :)
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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Chris Maunder wrote:
I have a blackberry
Hi my name is Chris Maunder and I have a Blackberry. Welcome Chris. I never thought I'd be here, but now that I am I'm happy to be supported by my friends. It's been 7 days since I geo-located myself with my 8800. We know how you feel Chris, and again welcome and well done.
David
David Cunningham wrote:
Hi my name is Chris Maunder and I have a Blackberry.
Am I the last holdout for this technology? or am I disqualified because I have access to many other cool stuff? :laugh:
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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Roger Wright wrote:
Nextel offers a cheap service that will allow the boss to locate all the phones via the Internet
Do you have a link?
David
You know that if I find out you have the link I'm going to loan my phone to friends so I can mess with your mind.
cheers, Chris Maunder
CodeProject.com : C++ MVP
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Roger Wright wrote:
What I really want is one of these[^]!
They are nice, we have two for surveying. But the garmin is still handy because it is faster and more portable -- with the external antenna we get 2 meter accuracy and can take it anywhere. Plus with the magnetic mounting, we can put the antenna on things to measure their location, even 20feet in the air. :)
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
I know I ask you this every 6 months, but what would you recommend that would allow me to carry it on a bike and get accurate 3D data so I can chart the hill climbs I've done? Battery life must be >5 hrs and must be water resistant and lightweight.
cheers, Chris Maunder
CodeProject.com : C++ MVP
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Chris Maunder wrote:
I have a blackberry
Hi my name is Chris Maunder and I have a Blackberry. Welcome Chris. I never thought I'd be here, but now that I am I'm happy to be supported by my friends. It's been 7 days since I geo-located myself with my 8800. We know how you feel Chris, and again welcome and well done.
David
Based on the circumstances of me aquiring my phone you realise that it will never, ever work correctly and that I will end up cursing it to the seven hells. I also know you are expecting me to walk into your office tomorrow or Wednesday admiting that the phone is suboptimal in some esoteric but incredibly important (to me) feature. Yes, I am high maintantance :D
cheers, Chris Maunder
CodeProject.com : C++ MVP
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I've finally done it. I have a blackberry. I swore to Dave that Hell would freeze over before this day happened but there you go. But mine has a GPS. And it's so cool. So very cool. I have absolutely no idea what I'm going to do with a device that doesn't seem to be supported by Vista and can only give me latitude and longitude, but I'm totally geeking out watching it aquire satelites. So I hear this thing can make phone calls and stuff too...
cheers, Chris Maunder
CodeProject.com : C++ MVP
Chris Maunder wrote:
I've finally done it. I have a blackberry.
So. Now you can finally work your way through emails while using the restroom. Brilliant! :rolleyes:
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It appears that everybody is under the impression that I approve of the documentation. You probably also blame Ken Burns for supporting slavery.
--Raymond Chen on MSDN
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That's nice, but what you really want is one of these: http://www.survey-lab.com/products.htm[^] I found this on the weekend: http://www.guide-infrared.com/en/lm2_show.asp?xh=123&n=2[^] ... if only i could justify getting one.
...cmk Save the whales - collect the whole set
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I know I ask you this every 6 months, but what would you recommend that would allow me to carry it on a bike and get accurate 3D data so I can chart the hill climbs I've done? Battery life must be >5 hrs and must be water resistant and lightweight.
cheers, Chris Maunder
CodeProject.com : C++ MVP
Chris Maunder wrote:
Battery life must be >5 hrs and must be water resistant and lightweight.
I think these should be the primary factors. I bought this one[^] for work, based on the simpler version (60C that is now discontinued). Look for good horizontal position for anything that you are attached to the ground. Good vertical can be handled with an altimeter, or better and easier still by post processing with elevation data for the location. You can pretty much assume you didn't go flying while on the bike trail, so if the elevation reads up or down you can adjust the data post travel. That one has been good to me. It is waterproof, but only for a short time. It floats, but if it falls in the water it has to be retrieved rapidly and dried out before using again. It is not super lightweight though. They have eTrex series for biking and running, but I have never tried them. I can't afford to buy them all myself, and work cares only about the best of the best of the best. ;)
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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Big and black and shiny with (did I mention?) a potentially completely useless GPS. Otherwise known as the 8800[^]
cheers, Chris Maunder
CodeProject.com : C++ MVP
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I've finally done it. I have a blackberry. I swore to Dave that Hell would freeze over before this day happened but there you go. But mine has a GPS. And it's so cool. So very cool. I have absolutely no idea what I'm going to do with a device that doesn't seem to be supported by Vista and can only give me latitude and longitude, but I'm totally geeking out watching it aquire satelites. So I hear this thing can make phone calls and stuff too...
cheers, Chris Maunder
CodeProject.com : C++ MVP
LOL I'm there already, except mine's a Mio P550 running TomTom v6 under Windows Mobile 5. Having the GPS is sweet...for me it makes the difference between "useful" and "must have".
Anna :rose: Linting the day away :cool: Anna's Place | Tears and Laughter "If mushy peas are the food of the devil, the stotty cake is the frisbee of God"
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I've finally done it. I have a blackberry. I swore to Dave that Hell would freeze over before this day happened but there you go. But mine has a GPS. And it's so cool. So very cool. I have absolutely no idea what I'm going to do with a device that doesn't seem to be supported by Vista and can only give me latitude and longitude, but I'm totally geeking out watching it aquire satelites. So I hear this thing can make phone calls and stuff too...
cheers, Chris Maunder
CodeProject.com : C++ MVP
Hard at work already? RIM explains BlackBerry crash; questions remain[^]
The BlackBerry network failure this week was caused by a small bit of new code and a still unexplained problem in the network’s failover process.
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Hard at work already? RIM explains BlackBerry crash; questions remain[^]
The BlackBerry network failure this week was caused by a small bit of new code and a still unexplained problem in the network’s failover process.
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Chris Maunder wrote:
I've finally done it. I have a blackberry.
So. Now you can finally work your way through emails while using the restroom. Brilliant! :rolleyes:
----
It appears that everybody is under the impression that I approve of the documentation. You probably also blame Ken Burns for supporting slavery.
--Raymond Chen on MSDN
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I'm sure there's a good answer to this but why would anyone want to know where they were to within 3m as opposed to 8m?
Well, if you're trying to use a GPS to locate an underground utility line, a pipe or a septic tank, then you need as much accuracy as possible. Or, I'd like to able to use a GPS for locating points for building things on my property, so I'd probably need <1m. But, if those devices exist for civilian use, they are probably way too expensive at this point in time. So, the surveyors won't be out of business anytime soon.:-D
Andrew C. Eisenberg Nashville, TN, USA (a.k.a. Music City USA) (Yes Virginia, there are rock and roll stations in Nashville! :laugh:)