Entries Tagged as 'gps'

#wtrip10 – Stalking me via Enroute

This is more of a test than anything.  Using EnRoute for the Location Sharing on my 3 day drive to Adelaide following the coast.

As I am on Vodafone sim on my HTC-Desire (more outback trips I use a Telstra Sim), there are a few black spots along the coast I will be dropping back to Edge network as well… so I have no idea how well it work.

(p.s sorry about the frame as well, but all going well this should work)

(p.p.s sorry in advance for the fact that I will forget to turn on the software at some point in time :-) )

Also you can stalk me in the usual ways via Twitter or Foursquare as well.

A suprise near conclusion for the #telstradesire

When I started this, I was thinking would I use this phone to replace my Nokia n95-8gb and whilst the answer is a qualified yes… there is a different item it may well end up replacing.

The Car Computer for the Road Trip My UMPC, the Asus R2H which I use primarily as my car computer these days (yes I am that sad I have a car computer).  I’ll need to trick it up a bit.. like with a bigger SD card or two but it could be possible.  The main things I do with the R2H are make time-lapse driving videos (eg http://www.youtube.com/watch?v=CwjbluNF3So)  and run OziExplorer for offline detailed topomaps to see where I am and where I want to go.  Google maps just doesn’t cut it when you get off the beaten path. And have some music to sing along badly to.

With a few well choosen Apps I could do this.  It is going to take sometime to work it all out, but I really think that this is possible.

There are a few things that the R2H can do that the Desire can not.. storage and downloading photos from my D90, but I can still take the computer for longer trips, just not mount it on the windscreen.  One of these weekends I’ll get a decent screen mount, and I already have a lighter to USB power supply, plug in my FM transmitter to the headphone jack and I think it can be done.

I really wish that I could get offline navigation for free like I can on my Nokia with Ovi Maps (well not free $10 because I have an old phone) but still… the fact I am even considering this I think is noteworthy about the device.

http://www.wolfcat.com.au/randomrants/tag/r2h

another GPS trace from the #telstradesire

This time I took the bus and train to work. Electric Trains are notorious for getting a GPS signal even with a window seat it can be tricky to get a solid lock. I was very pleased with the strength of the signal and the trace. Once again I just used the GPS and not the WIFI positioning. There are a few drop outs in the signal when the train passed through some cut outs and some big road bridges. However the trace is still good enough to see where I went. Another advantage is that the trace actually has the broken lines. The traces via Sports Tracker fill in the blanks. Having the Gaps lets me see where the signal did drop out and most software for geotagging photos will let you infer location from gaps in the traces so this is not a major problem.

So here is the trace.


View Larger Map

Geotracing and the #telstradesire

One of the reasons I put down as my interest in the #telstradesire was my interest in Geotagging and Geoawareness…   So here is the blog post covering that…

First things first.. the bad.  There is a known issue with the GPS on the Desire and the Telstra HTC setup.  One hopes that all the people buying the phone from the shop from now on don’t have to do an Over the Air Update to get the GPS working… it needs to ship with the correct firmware. Mine didn’t, but then mine was not factory standard, so I can’t comment on that.

Now on to the good stuff.

WOW… the GPS on the HTC-Desire rocks.  Not just a little, but a lot.  Time to get a fix (even without Cell Tower prefixing) is simply fantastic.  This is the fastest GPS that I have now.  I have 3 others… two Nokia Phones (n95-8gb, N78) and my Asus R2H.. the HTC leaves them for dead.  Time to fix is often under 1 min even when it is a long distance from last fix, strength of fix is always great and it holds it fix very well once you move out of optimal GPS signal range, ie slightly indoors and in built up areas.

Although it took me a while to find the app to suit my needs.  What I was after was something that created either a KML or preferably a GPX file and stored that on the memory card.  No surprise really that the app to do this the cleanest was a Google App called My Tracks http://mytracks.appspot.com/ (See the website for a slightly tacky but helpful introduction.

Once I had the app that suited my need…  It was then easy to show a comparison to my most commonly used GPS (the Nokia N95-8gb) and the HTC-Desire.  So what I did was trace the drive into town I do I both devices.  Now they both were set to GPS only (no wifi) and I hit go within a few seconds on the trace.  Also both phones had a fix approx 2km away the night before.

The embedded file can below can be downloaded here.. n95-htc-samples.kmz (right click save as) to show you the detailed path.  The HTC-Desire got a fix before I had even turned the car on.. the Nokia took a couple of minutes to catch up.  To many this time frame may not seem important, but it means I can fire up the GPS on the Desire much faster to get a trace to log my road trips or just to tag photos on a photo walk.

Of course this will suck battery… but once I managed to turn off all the power and bandwidth sucking default settings battery life is once again acceptable.  Whilst the new iPhone may have the ability to do background apps.. the current ones don’t.  And a background task is what is required to do decent GPS logging.  The HTC did that perfectly.  As a test for a some other apps.. on the way home I ran two different background tasks doing logging to see what I would get, what I got was two different trace files :-)

So here are the traces… Blue is the Nokia, Red is the HTC.  Overall I’d give the more accurate trace to the HTC as well, but I still have to play with the software to get the most out of it.


View Larger Map

This blog post that I did covers how to take a GPX file and marry it to the shots from your DSLR to geocode your photos.

Given that this is a Google App, I really think Telstra should look at including Apps like this on the default setup on the phone, not just fill the phone with apps that are just WAP links.

Missing from the Exif – First post

Thought I would add the some of the stuff from photos to my blog, the sort of stuff that you do not find in EXIF data… the stuff that really makes a photo.

First cab of the rank so to speak will be my sunset photo from the other day…. of course if there are flickr photos you want the story behind, just drop me a line.

The basic shot was planned 3 hours before hand, when I noticed the smoke around the city from the series of burn off’s that the DSE was conducting that day.

Now smoke in the atmosphere will ALWAYS give you a red sunset. And if the smoke is thick enough, you will be able to see the whole disk of the sun with the naked eye, let alone needing ND Filters.

So I know it is going to be a great sunset, so I get home from work grab all my gear and head to my favourite place where I know that I can get the sun setting over water every time. Before I go however I have I quick scan over my flickr sunset set just to make sure I have the approx F Stops and Shutter speeds for similar photos in my head.

When I got to my location, I like always fired up the GPS on my phone to create a log file so that I can tag the photos… and because I am shooting the sunset swap to my 70-300mm lens. I’m after the sun as big as I can get in the shot (well at least very large, so am looking at the 200mm+ range)

Also I have my Hoya 62mm Circular Polariser on my lens. Now I have the cheap 70-300mm which has the problem that the front element rotates on focusing, meaning that you have to tweak the Polariser every time focus changes.

So that kind of covers the technical side of things… then that bit of luck comes into play. There was a boat with a wake boarding moving up and down the bay right opposite the outcrop I was standing on. This shot was the 4th shot I took of them.

As this shot is all manual, this is what I did. I took a practice shot of the sunset to make sure that the colour and lighting were correct. Then as the boat passed left to right I got a focus lock (single point – centre left) on the wake board rider. This gave me the opportunity to check that the first time they went passed that I could get the shot I was after. By now I already knew how far they would travel and when the return trip would be.

Next is that moment of fear… will they pass through my shot again… will they fall off, will they do something unexpected.

Lucky for me…. They didn’t… it all went to plan. I’d also put the camera into highspeed burst mode so that I could shoot more frames that I needed to capture the action. Given that it took the rider less than a second to pass through the sweet spot of the image I wanted to give myself every chance. As the rider got close to the the sun I made sure that I had focus lock on him and just panned the camera as he moved from right to left.

The biggest piece of luck however was when the rider decided to jump. Just before the reflection of the sun from my point of view.

So that is how I fill a blog post writing about a lucky image that took a lot of understanding to get.

So look at the EXIF data of peoples shots to see how the shot was done.. but really… look at the photo and that will tell you how it is really done.

(also you will find this image on Redbubble, with the Lat Long on the final image, where you can buy it from a post card to a framed print)

(oh nearly forgot)

Here is the EXIF Data:

Camera: Nikon D90
Exposure: 0.002 sec (1/640)
Aperture: f/5.6
Focal Length: 200 mm
ISO Speed: 250
Exposure Bias: 0 EV
Exposure Program: Manual
Date and Time (Original): 2010:03:25 19:12:24.00+11:00
Metering Mode: Multi-segment
Exposure Mode: Manual
White Balance: Auto
Digital Zoom Ratio: 1
Focal Length In35mm Format: 300 mm
Scene Capture Type: Standard
GPSVersion ID: 2.2.0.0
GPS Latitude: 37 deg 53′ 57.12″ S
GPS Longitude: 144 deg 59′ 2.35″ E
GPSAltitude: 9.5 m
Creator Tool: Adobe Photoshop Lightroom
Lens: 70.0-300.0 mm f/4.0-5.6