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Best GPS receiver

 
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starkhund
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Joined: Nov 05, 2010
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PostPosted: Fri Nov 05, 2010 5:47 pm    Post subject: Best GPS receiver Reply with quote

Hi, I have been researching GPS units for a few weeks now. I have found that SirfStarIII and MTK are almost equivalent, MTK is sometimes reported to have lower power consumption, is this right?

Basically, I am a photographer and would like to geo-tag my photos. I realise that I will probably have to buy software to sync my GPS data to the photos but that is ok. I will be traveling by foot, bicycle and in the car. I am looking for just a GPS receiver as I do not need a screen or any maps. I just want to track where I have been. I would quite like it to have a good fix with the satellites as I may well be hiking through the forest. I would also like it to work in a house - do any GPS receivers come with a gyro so they can estimate where you are if they loose signal?

Your help is much appreciated.

Thank you
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M8TJT
The Other Tired Old Man
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Joined: Apr 04, 2006
Posts: 10118
Location: Bexhill, South Sussex, UK

PostPosted: Fri Nov 05, 2010 8:32 pm    Post subject: Re: Best GPS receiver Reply with quote

starkhund wrote:
do any GPS receivers come with a gyro so they can estimate where you are if they loose signal?
I doubt if any hand held ones do, because you need to know speed and direction to dead recon your position. A gyro will give direction but not speed. The ones that do "dead reckon" either assume current speed and direction to be at the last known values, which gives rather poor results, or have a speed input from, say, the car's speedo, and a yaw rate gyroscope input for change in direction. (as fitted to some Honda cars, and no doubt others)
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starkhund
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PostPosted: Sat Nov 06, 2010 6:03 pm    Post subject: Reply with quote

Ok, so not including the gyro, what would a suitable unit be?

I forgot to mention that I take RAW photos so if it cam with software it would be great if it was compatible with them.

Also, I would prefer something that just records everywhere you go so you can upload your whole route to google maps or something (opposed to push to log).

Cheers
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mikealder
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Joined: Jan 14, 2005
Posts: 19638
Location: Blackpool , Lancs

PostPosted: Sat Nov 06, 2010 6:46 pm    Post subject: Reply with quote

Have a look at This Review for a decent bit of kit but I am not too sure if RAW format will let you post process to add Geo-Tagged data to a picture - Mike
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aj2052
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Joined: Jul 03, 2005
Posts: 1431
Location: Leics,UK

PostPosted: Sun Nov 07, 2010 12:52 am    Post subject: Reply with quote

I have a Skytraq Venus 6 which does photo tagging and overlays google maps seamlessly and also exports data, it is a Bluetooth Keyring unit with a USB connection also, 10hr rechargable batttey life and the route logging can be set at different time i.e. shorter the time more accurate your route on google map, also has a button on front to drop a marker on route, I paid about £28 on Fleabay so cheap enough to play with, will look for data sheet as only have jpg on computer which i can send if you want to pm me your addy.
is this any help?
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starkhund
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PostPosted: Sun Nov 07, 2010 10:49 am    Post subject: Reply with quote

Yea, that sounds great thanks. How does it hold up under cover and such?
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aj2052
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Joined: Jul 03, 2005
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Location: Leics,UK

PostPosted: Sun Nov 07, 2010 11:37 am    Post subject: Reply with quote

To be honest I havent used it to a great extent, but i just left it in my pocket or on dash plugged in to cigar lighter to maintain charge and had no problems with signals, it just does as it says on tin, havent used photo tagging so cant comment on that. settings are done via usb cable , if time too long it jumps across corners i.e point to point, settings include monitoring above certain speed i,e, stopped no logging, and shows speed and altitude via graphic strip, basicly very simple to use, will look further to find info and source. may take while because hospital visiting at moment.
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starkhund
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PostPosted: Sun Nov 07, 2010 1:08 pm    Post subject: Reply with quote

Cool, is the battery replaceable?

Cheers
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aj2052
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PostPosted: Sun Nov 07, 2010 1:33 pm    Post subject: Reply with quote

Unfortunately no
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robertn
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Joined: Feb 06, 2005
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PostPosted: Wed Nov 10, 2010 11:33 pm    Post subject: Reply with quote

Have you considered using a cell phone and some tracking software. Theres lots of options, and I bet you carry a phone with you anyway. Only issue I know of is the battery life with GPS on is low due small batteries to keep the phones small. This is easily overcome with a spare battery (or two), a charging cable in the car or an external battery.
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