Location based art: Audio Graffiti

One of the cool things about the Ubisense Real Time Location System (RTLS) is that customers come up with all sorts of interesting applications that we would never have thought of. We have had several artists doing cool things with the system - check out the video below showing "Audio Graffiti" by Zack Settel and Mike Wozniewski, powered by Ubisense. Users can "tag" or "spray" sounds at a location, and other users hear these as they move around the space. Click through on the video for more information.

Audio Graffiti no. 2 from Mike Wozniewski on Vimeo.

Location Based Services in 2014 - Part 1

The AGI in the UK is currently carrying out a "Foresight Study" to look at where the geospatial industry will be in five years' time. They have asked several dozen people to contribute short reports on different topics, and I was asked to write about Location Based Services. I thought I would publish the current working draft here, and I encourage you to contribute comments and suggestions that I can work into the final version. This is Part 1 of 2.

As an aside, I think that predicting 5 years out for Location Based Services is not unreasonable right now - we have had several significant breakthroughs in the past year or two, and so can make some fairly safe predictions based on widespread adoption of those. Timing makes a lot of difference - 5 years ago we had no Google Earth and no Google Maps (both launched in 2005), so any 5 year geospatial industry predictions back then would have been way off! Of course there will still be plenty of innovations that we don't anticipate too!

Scope

For the purposes of this discussion, a location based service is defined as a software-based service where a key element of that service is the current location of the user, derived using location sensing technology. We also consider applications that are based on data derived from users of location based services (such as real time traffic flow information); applications based on sensing the location not of users, but other objects such as vehicles or equipment; and some applications where the location of the user is not derived from sensors (for example applications based on anticipated future location).

Current Position

Location Based Services have been widely touted as “the next big thing” since the late 1990s, just before the dot com bubble burst. We have (finally) seen significant progress in the past couple of the years, with the iPhone in particular bringing location based services to a mainstream audience for the first time. A key limitation with the iPhone currently is that applications cannot run in the background, which rules out an important subset of location based services, those that carry out notifications or other actions proactively based on your current location. Battery life is still a challenge for continuously logging location of a phone, as GPS is relatively power hungry.

Most new phones now have location capabilities. We are also starting to see new capabilities that are very relevant to location based services, including compasses built in to smart phones, and augmented reality applications that combine location awareness, compass and built in camera. These capabilities provide new and compelling user interface capabilities for location based applications.

Anticipated Changes

Location tracking will be pervasive in 2014 – all mobile phones will have location tracking. Location based applications will be able to run in the background, overcoming a key current limitation (this will require improvements in battery technology). Built in compass, camera and augmented reality capabilities will also be on most if not all phones (as a baseline, consider that the proportion of phones with cameras exceeded 70% globally in 2008, with 75% anticipated in 2009).

The great majority of phones will be “smart phones” with capabilities exceeding today’s iPhones, including high quality graphics, touch screens, and the ability to run sophisticated applications (a basic iPhone costs $99 today, and in 5 years we will have had just over 3 iterations of Moore’s Law, so price performance will have improved by a factor of roughly 10).

Crowdsourcing and widespread use of sensors means that a wide variety of good quality and extremely current geospatial data will be available for free, including:

• Road data, with relevant information for routing, including real time traffic information
• Footpaths and cycle paths, with relevant information for routing
• Points of interest such as restaurants, shops, petrol stations, ATMs, etc, plus relevant real time information such as gas prices

Additional types of location sensing technology will be common, including the following:

• Proximity sensors, for example RFID or Bluetooth, which can detect when two devices are within a short distance of each other. One current example is a smart key, which will cause a car door to open when it is within a short distance. Another might be a Bluetooth device in a museum that displays relevant information, or plays relevant audio, on a smart phone when it is close by.
• Continuous local sensors, such as WiFi or ultrawideband (UWB). UWB has a much higher degree of accuracy (~30cm) compared to WiFi (meters or tens of meters depending on number of sensors and environment). High precision sensors enable a variety of indoor location based applications that are not possible with GPS.
• Very inexpensive passive RFID sensors (will be a few cents in this timeframe), which will be used to track huge numbers of inexpensive assets (at discrete points where they can be scanned, for example the entrance to warehouses or stores).

Usage of social networking applications will be highly pervasive. Unlike today, users will be able to maintain one common set of information about their networks of friends and business associates, and share this among multiple applications. This will be important for location related applications, for specifying what aspects of a person’s location information may be shared with whom.

High speed wireless communications networks will be pervasive in most parts of the world. It also seems reasonable to assume that the majority of newer vehicles will include a location tracking device and wireless communications by 2014.

Update: Part 2 discusses the impact of these changes on the geospatial industry, look at various application scenarios, and summarize five key points.

Ubisense location tracking to be featured at Location Intelligence

My former company Ubisense (which I still hold some equity in) is going to have its indoor location tracking technology featured at the upcoming Location Intelligence conference. I'm looking forward to seeing the latest iteration of the technology, which has come along significantly since I left there in late 2005 to join Intergraph. The technology will feature heavily in the opening "speed networking session", and all conference attendees will be given tags which will track their location throughout the conference. Ubisense uses ultrawideband networking, which is generally accurate to within a foot or so (though that depends on a variety of factors). When I worked in this space, I was really surprised to find out how hard it was to do accurate tracking indoors. The difficulty is that whatever type of sensing technology you use, signals tend to reflect off walls, floors and ceilings, and direct signals are frequently blocked by furniture, people or other obstacles. This means it is very easy to get false readings which can result in serious errors in location calculation.

There are a variety of technologies that people are using to try to tackle the problem. Passive RFID really just measures when a tag is within a given distance of a sensor, so it can be used to track whether someone has entered or left a given room or area of a building, but can't give a more precise location (unless you have a very dense set of readers). WiFi is another option which has a pretty coarse accuracy - typically tens of feet, so not enough to reliably identify which room someone is in, and certainly not accurate enough to measure more specific interactions between people. As I mentioned above, ultrawideband is generally accurate to within a foot or so, which puts it at the higher end of the range in terms of accuracy, with relatively low infrastructure needs compared to other high accuracy solutions like ultrasonic or laser sensors.

For several years now I have been thinking that the precision indoor location tracking market is about to take off, and it hasn't quite done so. But based on some of the signs I am hearing about from my friends at Ubisense, I think it may finally be reaching that point. I will write more about how it all works out at the show next week, and also plan a few more updates on what Ubisense is up to.