00:01Good morning everybody. My name is Danielle Cummings.
00:02I'm a PhD student at Texas A&M University.
00:06And I work in the Sketch Recognition Lab in the Computer Science Department.
00:11And today I'm going to be talking about GeoSketch.
00:13It's a pen-based interface for geospatial analysis.
00:18So, in our lab, we currently have a few ongoing research projects where we collaborate
00:27And so we get the opportunity to work closely with the civil engineering students and
00:37And the more we work with them, the more we've discovered that a lot of the tools, although fairly image dependent...
00:44...they don't have very many pen-based interfaces that recognize freehand sketches and also minimize...
00:54...the use menus and predefined commands to make changes to maps and
01:04So as a result, we felt there was kind of a gap or a limit to the level of unrestricted interaction...
01:12...that between GIS systems and novice users...
01:15...or users like myself who are too lazy to go through all the tutorials.
01:20But we believe that drawing with the pen and paper is the most natural means of
01:26I mean, everybody can do it.
01:28It's a quick and simple way to communicate ideas and, you know, it's something that
01:37So, excuse me...
01:41We believe the solution was to provide a pen-based interface for interacting with a lot
01:48...and we believe that that's kind of the direction that most interface design is taking.
01:55Here's a quick example of where we thought a pen-based interface would be useful.
02:00So I was working with a couple of civil engineering students and they told me that...
02:06...it wasn't uncommon to have a simple line or a point object in a shapefile to contain
02:15...which is why it required lots of commands or using menus to make edits to that
02:23And I figured that, you know, watching them, I figured it was kind of a tedious
02:27...especially for someone like myself who isn't familiar with the tool.
02:30So this is one of the reasons that we thought a pen-based interface that would allow a
02:36...make quick sketches and modifications to files such as this without having to...
02:42...be familiar with the tool ahead of time would be very useful.
02:47So we quickly designed a pen-based interface for working with a shapefile...
02:54...and what we did is, we extended one the ArcObjects provided in the ArcGIS library
03:02...and we used to generate basic primitive shapes for recognition.
03:07And once we recognized those shapes, we could use them to delete existing map
03:14...using an intersection of points as well leaving vertices on an existing map using
03:22So we can begin to see how some of these simple interaction methods can be
03:30...to interact with this geospatial data in a way that closely resembles a pen and
03:37...so if I were interacting with a digital map on paper.
03:42Okay. So here's another example that involves sketch recognition for the
03:55So...see if I can find my mouse. Oh, there it is.
04:00Okay, so in the Sketch Recognition Lab, we developed a real-time sketch
04:07...and it recognizes over 900 freehand drawn military interaction symbols,
04:16...and to date, that's the largest set of freehand recognized symbols.
04:23And you can kind of see, the menus that are popping up now are generated by the...
04:27...sketch recognition algorithms. They're not being chosen by the user who’s drawing.
04:32So it's basically the system’s best guess of what the user is trying to draw...
04:38...their confidence levels.
04:41And then the military course of action diagrams are used to depict battle
04:46...and they can include thousands of unique symbols.
04:57So in regards to COA Sketch, what we did is...
05:06...we took that application and extended it to include a geographical
05:15...and by the way all of this interaction is done using a Wacom tablet and a
05:29So...oops. Okay, that one's not...where's my mouse? There it is...okay.
05:43So you can see here that by integrating COA Sketch with a geospatial interface, we're able to use that sketch recognition...
05:51...and the geolocation data to begin to analyze it and create kind of an action narrative for...
06:01...for mission planning purposes.
06:04And here, since we're using a sketch recognition application that provides real-
06:12...we can then take that information and deliver it to a location-aware system to
06:22And there's...I'm not very good at drawing stars so I had to think for a while.
06:30Okay. And the Sketch Recognition Lab actually finished a prototype recently for a location-aware system called GeoTrooper.
06:38And the purpose of this system was to aid paratroopers in locating their
06:49The GeoTrooper system uses minicomputers as beacons...
06:52...and those minicomputers broadcast an ad hoc Wi-Fi network that contains
07:01And...excuse me...allergies acting up.
07:05That's encrypted, and it sends that encrypted information to receivers which we
07:15...and those receivers picked up the location of the beacons and then used the internal GPS capabilities...
07:23... to be able to map and locate the bearing and distance to each of the beacons
07:30Okay. So here you can see the interfaces for both the beacon and the receiver
07:39So the beacon interface is on the left and as you can see, it broadcasts...
07:43...not only its location but also the location of other beacons that are in range...
07:48...so that even if a beacon is out of range of any receiver, the closest beacon will...
07:52...still transmit all of the information of beacons that are out of range to that...
07:57...receiver so it can see all of the beacons that are connected through this daisy-chaining process.
08:04And then on the right is the interface for the receiver and...
08:09...it shows the location of the beacons superimposed over an MGRS grid.
08:16So here you can see the potential use where GeoSketch can be integrated within this system.
08:22So if I am, excuse me, if I have my Wacom tablet and my stylist and a digital...
08:28...map and I want to communicate a point of the location or a point of interest to
08:37All I have to do is draw this symbol on the map and that information will be
08:42So you get this real-time kind of tactical coordination and at the same time, it
08:52...in order to be able to recognize, you know, my intent through sketching.
08:57And then also it minimizes the need for radio communication if that's a problem
09:08Okay, so just to wrap up. I just want to conclude that we’ve currently been
09:14...for quickly editing and editing digital maps using freehand sketching
09:20And then we also use sketch recognition to decipher sketches...
09:25...as a means of translating course of action, military course of action symbols...
09:29...and then translating those actions into tactical analysis information that could...
09:34...be transmitted to a location-aware system.
09:38And if anyone is currently working on related research, I would really love to
GeoSketch: Pen-Based Interface for GeoSpatial Analysis
Danielle Cummings from Texas A & M University presents "GeoSketch: Pen-Based Interface for GeoSpatial Analysis" at the 2011 GeoDesign Summit.
- Recorded: Jan 6th, 2011
- Runtime: 09:36
- Views: 16683
- Published: Feb 18th, 2011
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