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Exif data and GPS data.
Hello Reader,
I have a camera, also I have a GPS device (Garmin eTrex Vista). With the available software I can extract data from the GPS device, for example I can make the format *.gpx (GPs eXchange format). Other formats can also be created. Is there software which can get the data from the *.gpx file (or one of the other format's) and insert it into the Exif data (and keeping the other exif data intact). This should offcourse happen according the the logged times. (I am aware that there are dedicated 'dongles' to collect the gps data and with the additional software this data can be used in the exif files. But the function of this is not worth the extra cost of this, and you have an extra device, where I am allready carying a GPS device). Thanks for your time and attention. Ben Brugman. |
#2
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Exif data and GPS data.
On Sun, 4 Feb 2007 15:12:53 +0100, Ben Brugman wrote:
Hello Reader, I have a camera, also I have a GPS device (Garmin eTrex Vista). With the available software I can extract data from the GPS device, for example I can make the format *.gpx (GPs eXchange format). Other formats can also be created. Is there software which can get the data from the *.gpx file (or one of the other format's) and insert it into the Exif data (and keeping the other exif data intact). This should offcourse happen according the the logged times. (I am aware that there are dedicated 'dongles' to collect the gps data and with the additional software this data can be used in the exif files. But the function of this is not worth the extra cost of this, and you have an extra device, where I am allready carying a GPS device). Thanks for your time and attention. Ben Brugman. As you mention -- there are specific devices for this function. The one that is most interesting (to me anyway) is the Sony GPS-CS1. device: http://www.dpreview.com/news/0608/06...sonygpscs1.asp . What it does is record position and real time every 15 seconds for up to 30 hours and then with PC software coordinates the position recorded with the time pictures are taken and adds EXIF geo tagging meta date to the picture. It seems the Sony supplied software only works with Sony camera though(at least nominally -- I haven't seen any information that indicates it has been adapted for other cameras but it seems like it should be possible). I assume this is what you are thinking could happen with your Garmin device? Will it record and create a downloadable trail like this? How much data would 30 hours of points every 15 seconds be in gpx format? Can your device keep that amount of tracking? Maybe the Sony device already uses this format. There seems to be no information on its data format and I haven't actually seen a device or its output to know what the format is (but knowing Sony it is probably some proprietary format). I haven't seen any mention of anything (even a mashup of various devices and software) that does specifically provides this "automatic" geo tagging though (other than the Sony device which costs $125 or so and another $500++ device that attaches to the camera and coordinates the recording of position with the picture taking). Another mechanism for geo tagging pictures is via Picasa, Google Earth combo. Flickr (and other online picture services I assume) also have mechanisms for geo tagging but these involve remembering where the picture was taken after the fact. (Some poking around reveals this site: http://triptracker.net/ -- maybe it does soemthing close to what you want? also this softwa Robogeo http://www.robogeo.com seems to do what you want) -- Brian Sullivan Courses by Wire (http://www.coursesbywire.com) |
#3
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Exif data and GPS data.
"Ben Brugman" wrote in message ... Hello Reader, I have a camera, also I have a GPS device (Garmin eTrex Vista). With the available software I can extract data from the GPS device, for example I can make the format *.gpx (GPs eXchange format). Other formats can also be created. Is there software which can get the data from the *.gpx file (or one of the other format's) and insert it into the Exif data (and keeping the other exif data intact). This should offcourse happen according the the logged times. (I am aware that there are dedicated 'dongles' to collect the gps data and with the additional software this data can be used in the exif files. But the function of this is not worth the extra cost of this, and you have an extra device, where I am allready carying a GPS device). Thanks for your time and attention. Ben Brugman. I found several utilities a year or two ago, but one issue at that time was they would modify the jpeg header to put the GPS info in it then recompress the image itself. I did ask one of the authors about just modifying the header without recompressing the image and he said he was looking into it. They are out there, but you might want to check on the re-compression issue. I have not looked recently so I don't know if they addressed that issue. You do have to make sure your camera clock is set correctly though :-) mikey |
#4
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Exif data and GPS data.
"Ben Brugman" wrote in message ... Hello Reader, I have a camera, also I have a GPS device (Garmin eTrex Vista). With the available software I can extract data from the GPS device, for example I can make the format *.gpx (GPs eXchange format). Other formats can also be created. Is there software which can get the data from the *.gpx file (or one of the other format's) and insert it into the Exif data (and keeping the other exif data intact). This should offcourse happen according the the logged times. (I am aware that there are dedicated 'dongles' to collect the gps data and with the additional software this data can be used in the exif files. But the function of this is not worth the extra cost of this, and you have an extra device, where I am allready carying a GPS device). Thanks for your time and attention. Ben Brugman. Sigh -- must get coffee ... must get coffee ... Forgot - here is one that I am aware of http://www.robogeo.com/home/ One of the key words for a google search is "georeferencing" or "geocoding". mikey |
#5
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Exif data and GPS data.
In article , Ben Brugman
wrote: Hello Reader, I have a camera, also I have a GPS device (Garmin eTrex Vista). With the available software I can extract data from the GPS device, for example I can make the format *.gpx (GPs eXchange format). Other formats can also be created. Is there software which can get the data from the *.gpx file (or one of the other format's) and insert it into the Exif data (and keeping the other exif data intact). This should offcourse happen according the the logged times. (I am aware that there are dedicated 'dongles' to collect the gps data and with the additional software this data can be used in the exif files. But the function of this is not worth the extra cost of this, and you have an extra device, where I am allready carying a GPS device). Thanks for your time and attention. Ben Brugman. You don't say what platform you are on, and I can't tell from your headers, so I'll give you my (the Mac) option, which workes absolutely wonderfully for me to do exactly that: GPSPhotolinker. http://oregonstate.edu/~earlyj/gpsphotolinker/ This is the only one I found works 100% of the time, and it does it from a GUI rather than a command line interface. It only increses my workflow by a couple of steps - instead of pulling the photos directly off of the card and into Aperture, I pull them all onto the HD first (I don't really have to do this, it's just faster than using GPSPL over a USB connection on the original card). I then connect my GPS unit (Garmin 60CSX) and it downloads the track data directly and saves it to your disk [you can have any number of track files, and toggle them on or off for access], and you can either manually or batch apply the GPS data to your photo(s). Manual allows you to pick the track point for each one, batch will do the whole folder based upon matching criteria you set up (time or distance from two points, nearest point, time weighted average of points, etc). Typically for me, it does about 100 photos/minute. Once that's done, I import into Aperture as normal. Interface is clean and easy to use. Best of all, it's /freeware/ - but send a donation to the author anyway (I did, there's a donation button on the "About" screen), it's a highly useful utility. For a sample of GPS linked photo data, see http://www.nwconcessions.com/sunset Sorry, I'm not familiar with any Win versions of similar software. -- You need only reflect that one of the best ways to get yourself a reputation as a dangerous citizen these days is to go about repeating the very phrases which our founding fathers used in the struggle for independence. -- Charles A. Beard |
#6
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Exif data and GPS data.
Thanks all for your time and attention.
Mike Fields and Brian Sullivan came with a site, a program exactly providing what I requested. Some questions where raised : The Garmin Vista can record 10000 logpoints. But I have to check how much time is between the logpoints. The Vista can be turned off so does not record any points then. So effectively I estimate that the vista can be used up to several longs days before the log track becomes filles. (Saving a log track as a sepparate track is also possible, but then some data is discarded, and I think that the timestamps are lost during the saving.) The Sony can record 30 hours one log for every 15 seconds. This is 7200 logpoints. My guestimate is that the Vista will last longer than the Sony. (Can the Sony be switched off, does is stop recording when staying in one place ?). ---- modifying the header without recompressing From the site I do know understand that this has been implemented. ---- You do have to make sure your camera clock is set correctly though :-) As always this is a good idee, but takes some disipline. For GPS data this is very essential. But having two (or more) camera's synchronised exactly, makes it easier to compare pictures an certainly to order pictures of dynamic events. Ken Lucke thanks for the addition of including a Mac anwser, allthough I myself use Windows, I know it is always difficult to get similar software for the Mac. So thanks for your addition. ----IIRC, you have a D80 and not a D200, correct? So you can't simply connect your GPS to the camera? No my 'main' camera is a D70, but I shoot with a pocket as wel. Even if the camera has a connection. The vista only has an RS232 connection and it's unlikely that it will iterface with other products. (For the Mac an interface has been announced, but I haven's seen it, for other producs I do not think the Vista will interface.) More modern GPS from Garmin I think use more open and modern interfaces. (Bleu Tooth would be nice, but that's the next generation I assume). Everybody thanks for your time and attention. For the future I am going to sync the clock of the camera more often, and until I get the software will keep a *.gpx file of the tracklog with the pictures. So even if I am not now adding the gps data to the exif file, I'll keep this possible in the future. Thanks for all your advises. Question, does anybody know how the Sony (camera) GPS devise performs in the field. (The Vista for example can loose the 'signal' or become less accurate, depending how you hold the device or the surrounding. The Vista on a neckstrap against your body is not the best configuration, urban area's can be a problem and foilage can be a problem. How does the Sony cope under these circumstances ?) Thanks Ben "Ed Ruf (REPLY to E-MAIL IN SIG!)" wrote in message ... On Sun, 4 Feb 2007 15:12:53 +0100, in rec.photo.digital.slr-systems "Ben Brugman" wrote: Hello Reader, I have a camera, also I have a GPS device (Garmin eTrex Vista). With the available software I can extract data from the GPS device, for example I can make the format *.gpx (GPs eXchange format). Other formats can also be created. Is there software which can get the data from the *.gpx file (or one of the other format's) and insert it into the Exif data (and keeping the other exif data intact). This should offcourse happen according the the logged times. (I am aware that there are dedicated 'dongles' to collect the gps data and with the additional software this data can be used in the exif files. But the function of this is not worth the extra cost of this, and you have an extra device, where I am allready carying a GPS device). IIRC, you have a D80 and not a D200, correct? So you can't simply connect your GPS to the camera? -- Ed Ruf ) http://edwardgruf.com/Digital_Photog...ral/index.html |
#7
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Exif data and GPS data.
In article , ben brugman
wrote: Thanks all for your time and attention. Mike Fields and Brian Sullivan came with a site, a program exactly providing what I requested. Some questions where raised : The Garmin Vista can record 10000 logpoints. But I have to check how much time is between the logpoints. Usually, it's not simply time, it's distance and/or time, with the time interval getting larger as you slow down. The Vista can be turned off so does not record any points then. So effectively I estimate that the vista can be used up to several longs days before the log track becomes filles. (Saving a log track as a sepparate track is also possible, but then some data is discarded, and I think that the timestamps are lost during the saving.) My program noted in its documentation that this _sometimes_ happens with _some_ models from _some_ manufacturers... so I'd test yours to make sure - yours may not actually do this. I've always just d/l'd the data directly using the program, so I have't followed my own advice here for my unit. The Sony can record 30 hours one log for every 15 seconds. This is 7200 logpoints. My guestimate is that the Vista will last longer than the Sony. (Can the Sony be switched off, does is stop recording when staying in one place ?). My Garmin 60CSX only records points while moving - of course, sometimes all GPS units "think" that they are moving even when standing still, due to a little drift in their accuracy/satellite lock, but I can leave mine on for days and still only have one track (not full). But usually track data becomes much more "sparse" when units are not moving. See the points below about buying the Sony with built-in GPS. ---- modifying the header without recompressing From the site I do know understand that this has been implemented. ---- You do have to make sure your camera clock is set correctly though :-) As always this is a good idee, but takes some disipline. For GPS data this is very essential. But having two (or more) camera's synchronised exactly, makes it easier to compare pictures an certainly to order pictures of dynamic events. I don't remember what camera you said you were using, but Canon's utility that comes with their DSLRs allows you to sync it to your computer's clock, which of course you should have set up for syncing with NIST via the internet or modem. Look for something in your software (Nikon?) similar. The GPS, of course, syncs up when it acquires satellites. Ken Lucke thanks for the addition of including a Mac anwser, allthough I myself use Windows, I know it is always difficult to get similar software for the Mac. So thanks for your addition. It was to help other Mac users as well, but gives you an idea of what's capable of being done. ----IIRC, you have a D80 and not a D200, correct? So you can't simply connect your GPS to the camera? No my 'main' camera is a D70, but I shoot with a pocket as wel. Even if the camera has a connection. The vista only has an RS232 connection and it's unlikely that it will iterface with other products. (For the Mac an interface Ah, there's your model - check with any utility software that came with it to see if you can sync it with your computer. has been announced, but I haven's seen it, for other producs I do not think the Vista will interface.) More modern GPS from Garmin I think use more open and modern interfaces. (Bleu Tooth would be nice, but that's the next generation I assume). Everybody thanks for your time and attention. For the future I am going to sync the clock of the camera more often, and until I get the software will keep a *.gpx file of the tracklog with the pictures. So even if I am not now adding the gps data to the exif file, I'll keep this possible in the future. Thanks for all your advises. Question, does anybody know how the Sony (camera) GPS devise performs in the field. (The Vista for example can loose the 'signal' or become less accurate, depending how you hold the device or the surrounding. This is actually typical - even dense trees can sometimes cause a GPS unit to lose lock on the satellites, as they are low-power, line-of-sight signals. The Vista on a neckstrap against your body is not the best configuration, urban area's can be a problem and foilage can be If it's /that/ difficult to keep it locked on the satellites, you might want to look for a new unit. Technology has improved them tremendously within the last few ears. My 60CSX can usually stay locked on 6 or 8 satellites (out of 12 channels) even downstairs in my basement (concrete) and sitting next to my computer (and despite the resulting interference that comes from it and the surrounding electronic equipment). I have no trouble at all in "urban" areas (with the unit mounted next to the left windshield frame on the dashboard). a problem. How does the Sony cope under these circumstances ?) Can't answer that, but I can reccommend that you stick to seperate units if you are looking to move up later - not only are you going to be very limited (in models available) if you look for a combined unit, and their combined capabilities will be probably be more limited en toto as well than two seprate units, but also you have to think of repair issues (if a combined unit goes down for either of the functions [camera or GPS], the whole unit has to be sent in for repair* so you are out both items). If you have seperate units and one fails, you can get it fixed independently (possibly renting or borrowing a replacement in the meantime, which would be more difficult to do if you had to find a combination or both units). Also the same goes for upgrades, you'll get locked into finding only units with both features if you get an all-in-one, whereas you can upgrade each independently if you dont. Not saying "Don't buy thhe Sony", just sayng "think about the ramifications long term". Thanks Ben \ * A note about Garmin he Garmin's warranty service is _exceptional_ I had my 60CSX go bad (problem with the external USB/power connector board causing the thing to have fits, bouncing back and forth between powered and batteries, and not allowing connection to the computer through the USB port). They took it, repaired it, and had it back very quickly (actually it was a brand new, in box with all accessories included, unit with all my track data/waypoint data transferred to it) - and that one went bad, too. Not only did they again check it out and send a whole new unit with absolutely no argument, again transferring the stored data, they they insisted on replacing both my 12v power supply cord (which I had bought seperately from the unit - the tech support gal said that the 60CSX was her absolute favorite and had never had any problems like mine reported, and virtually no problems at all, period) AND the computer USB cable, because the tech support gal was highly suspicious of the 12v power supply cable's regulator as to the culprit for the problem both times (both involved external power problems). They issued a "fast track" RMA the second time, due to its unusual nature, and I had my unit back within a week and a half of shipping it to them, AND I had a followup call from the tech support person making sure that the situation had been resolved). As the problem has never cropped up again, I'd have to say that the assesmment that it was the 12v power cable was probably correct. Throughout the whole process, everyone I talked to at Garmin was helpful, friendly, and not the least bit put out (as it seems many tech support/warranty places acting as if you are imposing on /them/) about fixing and helping. -- You need only reflect that one of the best ways to get yourself a reputation as a dangerous citizen these days is to go about repeating the very phrases which our founding fathers used in the struggle for independence. -- Charles A. Beard |
#8
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Exif data and GPS data.
Usually, it's not simply time, it's distance and/or time, with the time interval getting larger as you slow down. logpoints are made at very variable time distances. Sometimes every second. So this can be memory consuming. (The sony 'dongle' is doing it once every 15 seconds). My program noted in its documentation that this _sometimes_ happens with _some_ models from _some_ manufacturers... so I'd test yours to make sure - yours may not actually do this. I've always just d/l'd the data directly using the program, so I have't followed my own advice here for my unit. With the garmin software the log shows time stamps the saved tracks are condensed and do not show timestamps. My Garmin 60CSX only records points while moving - of course, sometimes all GPS units "think" that they are moving even when standing still, due to a little drift in their accuracy/satellite lock, but I can leave mine on for days and still only have one track (not full). But usually track data becomes much more "sparse" when units are not moving. See the points below about buying the Sony with built-in GPS. It's a seperate 'dongle' sized GPS something the size of a large USB stick. It works independend from the camera. I don't remember what camera you said you were using, but Canon's utility that comes with their DSLRs allows you to sync it to your computer's clock, which of course you should have set up for syncing with NIST via the internet or modem. Look for something in your software (Nikon?) similar. The GPS, of course, syncs up when it acquires satellites. When in the field you have to sync the camera to the GPS. (And anyway GPS time should be far more accurate than NIST via the internet.) No my 'main' camera is a D70, but I shoot with a pocket as wel. Even if the camera has a connection. The vista only has an RS232 connection and it's unlikely that it will iterface with other products. (For the Mac an interface Ah, there's your model - check with any utility software that came with it to see if you can sync it with your computer. The time sync is not to important for me. Sync in the field with the GPS. Question, does anybody know how the Sony (camera) GPS devise performs in the field. (The Vista for example can loose the 'signal' or become less accurate, depending how you hold the device or the surrounding. This is actually typical - even dense trees can sometimes cause a GPS unit to lose lock on the satellites, as they are low-power, line-of-sight signals. The Vista on a neckstrap against your body is not the best configuration, urban area's can be a problem and foilage can be If it's /that/ difficult to keep it locked on the satellites, you might want to look for a new unit. Technology has improved them tremendously within the last few ears. My 60CSX can usually stay locked on 6 or 8 satellites (out of 12 channels) even downstairs in my basement (concrete) and sitting next to my computer (and despite the resulting interference that comes from it and the surrounding electronic equipment). I have no trouble at all in "urban" areas (with the unit mounted next to the left windshield frame on the dashboard). I am aware that the 60CSX with the sirf chipset and an 'external' antenna is far more capable than the Vista. But then there is a price difference as wel. So for economic reasons (and size) as wel I have choosen the Vista. (With maps it was less than 1/3 of the price of a 60CSX). a problem. How does the Sony cope under these circumstances ?) Can't answer that, but I can reccommend that you stick to seperate units if you are looking to move up later - not only are you going to The Sony unit is a very seperate unit, it can be attached to the camera, because it is small, but it's seperate. Not saying "Don't buy thhe Sony", just sayng "think about the ramifications long term". I like the idea of the Sony, small, no buttons or screen, just a logger, but then how good is it ? (You can not check the workings of it, and because of the size won't perform as any Garmin in the 60 range). Thanks Ben \ * A note about Garmin he Garmin's warranty service is _exceptional_ I had my 60CSX go bad (problem with the external USB/power connector board causing the thing to have fits, bouncing back and forth between powered and batteries, and not allowing connection to the computer through the USB port). They took it, repaired it, and had it back very quickly (actually it was a brand new, in box with all accessories included, unit with all my track data/waypoint data transferred to it) - and that one went bad, too. Not only did they again check it out and send a whole new unit with absolutely no argument, again transferring the stored data, they they insisted on replacing both my 12v power supply cord (which I had bought seperately from the unit - the tech support gal said that the 60CSX was her absolute favorite and had never had any problems like mine reported, and virtually no problems at all, period) AND the computer USB cable, because the tech support gal was highly suspicious of the 12v power supply cable's regulator as to the culprit for the problem both times (both involved external power problems). They issued a "fast track" RMA the second time, due to its unusual nature, and I had my unit back within a week and a half of shipping it to them, AND I had a followup call from the tech support person making sure that the situation had been resolved). As the problem has never cropped up again, I'd have to say that the assesmment that it was the 12v power cable was probably correct. Throughout the whole process, everyone I talked to at Garmin was helpful, friendly, and not the least bit put out (as it seems many tech support/warranty places acting as if you are imposing on /them/) about fixing and helping. -- You need only reflect that one of the best ways to get yourself a reputation as a dangerous citizen these days is to go about repeating the very phrases which our founding fathers used in the struggle for independence. -- Charles A. Beard |
#9
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Exif data and GPS data.
In article , Ben Brugman
wrote: Usually, it's not simply time, it's distance and/or time, with the time interval getting larger as you slow down. logpoints are made at very variable time distances. Sometimes every second. So this can be memory consuming. (The sony 'dongle' is doing it once every 15 seconds). Yes, that's what I was saying - as far as the variable time... but the time varies inversely proportional to the speed (although I don't know the exact algorithm). My program noted in its documentation that this _sometimes_ happens with _some_ models from _some_ manufacturers... so I'd test yours to make sure - yours may not actually do this. I've always just d/l'd the data directly using the program, so I have't followed my own advice here for my unit. With the garmin software the log shows time stamps the saved tracks are condensed and do not show timestamps. Hmmm... I'll have to check that on my 60CSX. Like I said, I haven't actually checked that with my model. My Garmin 60CSX only records points while moving - of course, sometimes all GPS units "think" that they are moving even when standing still, due to a little drift in their accuracy/satellite lock, but I can leave mine on for days and still only have one track (not full). But usually track data becomes much more "sparse" when units are not moving. See the points below about buying the Sony with built-in GPS. It's a seperate 'dongle' sized GPS something the size of a large USB stick. It works independend from the camera. OK, I didn't realize that, I thought you were talking about a built-in GPS system. I don't remember what camera you said you were using, but Canon's utility that comes with their DSLRs allows you to sync it to your computer's clock, which of course you should have set up for syncing with NIST via the internet or modem. Look for something in your software (Nikon?) similar. The GPS, of course, syncs up when it acquires satellites. When in the field you have to sync the camera to the GPS. (And anyway GPS time should be far more accurate than NIST via the internet.) Those are both true, but I was going under the situation of a separate Camera/GPS that weren't communicating directly. So you are correct for your situation. No my 'main' camera is a D70, but I shoot with a pocket as wel. Even if the camera has a connection. The vista only has an RS232 connection and it's unlikely that it will iterface with other products. (For the Mac an interface Ah, there's your model - check with any utility software that came with it to see if you can sync it with your computer. The time sync is not to important for me. Sync in the field with the GPS. Te only reason I worry about the time sync _is_ for the software to sync up the pix with the GPS data - otherwise, unless I was shooting something for court or something similar, I couldn't care less if the time was off by a minute or two. Question, does anybody know how the Sony (camera) GPS devise performs in the field. (The Vista for example can loose the 'signal' or become less accurate, depending how you hold the device or the surrounding. This is actually typical - even dense trees can sometimes cause a GPS unit to lose lock on the satellites, as they are low-power, line-of-sight signals. The Vista on a neckstrap against your body is not the best configuration, urban area's can be a problem and foilage can be If it's /that/ difficult to keep it locked on the satellites, you might want to look for a new unit. Technology has improved them tremendously within the last few ears. My 60CSX can usually stay locked on 6 or 8 satellites (out of 12 channels) even downstairs in my basement (concrete) and sitting next to my computer (and despite the resulting interference that comes from it and the surrounding electronic equipment). I have no trouble at all in "urban" areas (with the unit mounted next to the left windshield frame on the dashboard). I am aware that the 60CSX with the sirf chipset and an 'external' antenna is far more capable than the Vista. But then there is a price difference as wel. So for economic reasons (and size) as wel I have choosen the Vista. (With maps it was less than 1/3 of the price of a 60CSX). I don't have the external antenna, so that doesn't come into the performance difference, and I was only pointing out that if you are having diffictulties in normal circumstances with your unit, it might be time for a change. "On a neckstrap against to your body" seems like a normal circumstance that you'd want it to perform under to me. a problem. How does the Sony cope under these circumstances ?) Can't answer that, but I can reccommend that you stick to seperate units if you are looking to move up later - not only are you going to The Sony unit is a very seperate unit, it can be attached to the camera, because it is small, but it's seperate. Again, my misunderstanding about the configuration you were discussing. Not saying "Don't buy thhe Sony", just sayng "think about the ramifications long term". I like the idea of the Sony, small, no buttons or screen, just a logger, but then how good is it ? (You can not check the workings of it, and because of the size won't perform as any Garmin in the 60 range). This, I have no clue about, so hopefully others will dive into this thread with actual working experience. -- You need only reflect that one of the best ways to get yourself a reputation as a dangerous citizen these days is to go about repeating the very phrases which our founding fathers used in the struggle for independence. -- Charles A. Beard |
#10
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Exif data and GPS data.
"Ben Brugman" wrote in message ... Usually, it's not simply time, it's distance and/or time, with the time interval getting larger as you slow down. logpoints are made at very variable time distances. Sometimes every second. So this can be memory consuming. (The sony 'dongle' is doing it once every 15 seconds). My program noted in its documentation that this _sometimes_ happens with _some_ models from _some_ manufacturers... so I'd test yours to make sure - yours may not actually do this. I've always just d/l'd the data directly using the program, so I have't followed my own advice here for my unit. With the garmin software the log shows time stamps the saved tracks are condensed and do not show timestamps. I believe most Garmins do that. My Etrex Summit does and reading the docs of MacGPS Pro makes it sound like all the Garmins do. Greg |
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