Nick Taylors blog

Brightkite is a geosocial network. Based loosely on twitter-style short messages, but with a much stronger leaning towards location awareness.

I’ve used both the standard Brightkite website and also their iPhone optimized site for many months. There are three things I really like about Brightkite. Firstly, they’ve done a great job in making the application agnostic. I don’t care if I’m accessing Brightkite via Safari on my Mac in my office, using the iPhone optimized site or now, the native iPhone application (link to the iTunes store). While obviously the look is slightly different, the feel is alway the same. 

Secondly, Brightkite is great at getting my location. When access from a desktop or notebook computer, Brightkite will do a pretty good job at guessing your location either by using the Loki plugin, or Mozilla Geode (more here and here). When using your iPhone, Brightkite will use CoreLocation to discover your location. I like the way the iPhone native application will sort your placemarks by what it thinks is nearest to your estimated location. When the estimated location isn’t quite right, you can “pick a place”, by searching for your actual location. It’s nice that locations are named, rather than just co-ordinates, it’s a nice human-friendly touch. 

Lastly, the balance between openness and privacy is ideal, and customizable. For example, if I want to make my exact location known or hidden, or obfuscated (Brightkite calls this “City” and is really just your location generalized to a larger area), a simple switch lets me do this. I can also set privacy levels for different categories of contacts, including trusted friends, friends and everyone else.

This aspect makes it ideal for meeting fellow Brightkite users in real-world social gatherings. Use Brightkite to see who’s nearby and send them a message!

In fact, it’s how I met Brightkite founder Martin May, at a recent Tech Cocktail event in Boulder. 

Of course, Brightkite lets you stream your consciousness a’la most other social networks, via a simple URL:

http://brightkite.com/people/nickt

This will take you to my stream of checkins, photos and notes. 

It can also stream directly to twitter, and meta-update services like ping.fm support updating Brightkite. Links to services like Facebook, Flickr and Linked-In are available via your profile page. 

Here’s a video demo of the Brightkite iPhone app in action.

Brightkite for the iPhone from Brightkite on Vimeo.

More background:

Brightkite Blog
Ars Technica review of the Brightklite iPhone Application
ReadWriteWeb review of Brightkite

Summary: a great mobile geosocial network. Recommended.

UMapper makes it easy to embed Flash-based maps in your website, blog or popular social networks. If you quickly need to create and share a one-off map for almost any purpose, UMapper is a great way to do it. 

UMapper home page

I like UMapper as both a technologist and as a traveler. It has one of the easiest interfaces I’ve used; I created and embedded my first map within 3 minutes.

WIth the ability to choose from map providers Google, Microsoft and OpenStreetMap, and the ability to embed maps easily into Facebook, MySpace, Blogger blogs, Wordpress (hosted) blogs, Orkut and iGoogle – as well as providing a Wordpress plug-in, there is enormous flexibility and ease of use. 

There’s also the ability to add custom markers, polygons, circles and lines, making it useful for a whole set of businesses from mining companies to real-estate agents. 

Import options supported include KML, GPX, and GeoRSS.

The traveler in me really liked twbr’s map, outlining his route through Africa. 

I’ve also started using it over on my other blog. 

UMapper: If you need to quickly create or embed custom maps it’s highly recommended.

Background Info:
Wikipedia Overview
Bob Bruninga’s Site
APRS Wiki

Position Updates:
The Google Maps based, and nicest looking – aprs.fi
Easy to use, and my preferred mobile site – db0anf.de
The dated, but still useful findu.com
A different approach on the interface – k6ib.com

I’ve finally installed Mobile APRS in the Green D90. I’ve had static APRS working, but it was time to integrate GPS into the system; particularly useful when we head out to remote locations as we do most weekends.

The original plan was to simply send the trucks current coordinates as acquired by the GPS via a TNC to the radio and out, to be picked up by other stations and relayed to an igate and from there onto the internet where many various sites show your position in near real-time.

This would have been a very simple setup consisting of a Garmin GPS16HVS, an OEM unit that basically integrates the GPS and antenna into a single unit without a display, a Kantronics MT-1200 TNC and an Icom IC-2200 single band radio.

However, I ran out of time (I wanted it working for our Utah “Hole in the Rock” trip), and didn’t want to go back to Radio Shack for another 2.5mm 3 way jack so I dug out my “spare” Kenwood TM-D700A, which has a built it TNC and would save some time during the configuration.

With the Kenwood radio, the system simply consisted of the GPS16 connected to the D700A radio.

Installing the GPS16 was a small problem. It comes with a magnetic mount, which, of course, is no use in an aluminum-bodied Land Rover Defender (actually, it’s Birmabright). The green D90 is a bit old and beat up anyway, so I wasn’t too bothered about drilling the roof. I drilled 4 holes for the GPS16 and another 4 for the cable passthrough (a waterproof marine-grade “Cable Clam“, made by Blue Sea Systems and available from from West Marine), and simply fed the cable through.

The GPS16 ships with an RJ45 connector, and I can’t imagine what use it has except for factory testing. After cutting it off, there are basically 2 sets of data wiring and also power wires in a very compact space (as described in the manual – PDF link). It’s a simple job, but fiddly connecting the power to my usual 45A Anderson Powerpole connectors and a 3-way 2.5mm jack. Initially I forgot that the data ground has to be cross connected to the ground, so the GPS did not switch on.

I removed the 2.5mm jack and connected an DB9 socket so I could connect a terminal to the GPS16. It was about now I realized that it wasn’t powered on (there is no indicator light to show this), but I was amising myself watching the NMEA sentences appear on my terminal. I also downloaded the Garmin SNSRCFG software, which enabled me to play with a ton of settings in the GPS16. I just made sure the data it was acquiring was correct before disconnecting it and putting the 2.5mm jack back on.

Then, I connected the jack to the radio and to my delight I saw the GPS indicator flashing, meaning that the radio was receiving telemetry from the GPS. Fiddling with a few settings on the radio, to configure it to take position data from the GPS and override the manual co-ordinates I’d entered earlier, I saw the “MY POS” indicator flash up, showing that APRS data was being transmitted. A drive around the block and a quick visit to db0anf, and I could see my position being updated in near real time. Success!

You can see my position updates here.

Overall, the Garmin GPS16 and Kenwood TM-D700A radio is a great combination for hands off APRS work.

I do have a few more steps to finish this little project, including making a small breakout box for the GPS16, which will have switched power and a connection for both the radio (via a jack) and terminal (via a DB9). And then I’ll have to do it all again for the black D90!