GTWeb dds

GTWeb - Position-annotated Photographs

The GTWeb system demonstrates how trip diaries can be created and presented by exploiting the synergies of integrating different information appliances and publicly accessible databases. A GTWeb site consists of a trip overview, timelines, maps, and annotated photographs. The site is created by processesing a user's GPS track log and digital camera pictures, linking them with a gazetteer database, topography, and coastline data. Our choice of consumer-grade appliances demonstrated that many interesting pervasive computing applications can be constructed by combining ordinary equipment in innovative ways, while a survey showed that end-users are interested in tools that allow them to effectively use the new data types generated by their appliances.

This page contains the software described in the article Diomidis Spinellis. Position-annotated photographs: A geotemporal web. IEEE Pervasive Computing, 2(2):72-79, April-June 2003.

You can see an example here. The software is a research prototype; it is command-line driven, is written for specific GPS and picture data formats, and depends on external programs and data like GMT - The Generic Mapping Tools. It is made available with the hope that other researchers can build on it. You might also be interested to read about Microsoft's WWWMX - World Wide Media Exchange programme; another line of related work.

Download

• Software license (GPL)
• timeline.pl - main GTWeb generator (Perl)
• near.c - track log annotation (C)
• pmeta.pl - photograph metadata extraction (Perl)

Operation

• Photographs and a file titled pmeta.xml with the photograph metadata. The program pmeta.pl can be used to create the metadata file. Here is an excerpts of pmeta.xml:

  <photolist>
  
  <photo>
  <name>DSC00001.JPG</name>
  <time>998409586</time>
  <caption>At the Asa Maris Hotel</caption>
  <localtime>Tue Aug 21 18:59:46 2001</localtime>
  <gmtime>Tue Aug 21 15:59:46 2001</gmtime>
  </photo>
  
  <photo>
  <name>DSC00002.JPG</name>
  <time>998409660</time>
  <caption>At the Asa Maris Hotel</caption>
  <localtime>Tue Aug 21 19:01:00 2001</localtime>
  <gmtime>Tue Aug 21 16:01:00 2001</gmtime>
  </photo>
  

  Note that tags should appear on the same line.
• The track log, in a file named track.trk, in the following format:

  T  N38 04.8777 E023 49.9539 Sun Aug 19 08:48:55 2001
  T  N38 04.8752 E023 49.8608 Sun Aug 19 08:49:05 2001
  T  N38 04.8826 E023 49.7408 Sun Aug 19 08:49:15 2001
  T  N38 04.8858 E023 49.5329 Sun Aug 19 08:49:31 2001
  

• Additional waypoints and routes, in a file titled way.way, in the following format:

  D  100	WGS 84
  R  01 YPATI-KATAFYGIO
  W  YPATI  N38 52.1999 E022 14.4999 Sun Dec 31 00:00:00 1989 09-NOV-01 22:45 Ypati
  W  AMALIO N38 50.7000 E022 15.9000 Sun Dec 31 00:00:00 1989 09-NOV-01 22:45 Amaliovrysi
  W  PERDIK N38 50.4000 E022 16.0000 Sun Dec 31 00:00:00 1989 09-NOV-01 22:45 Perdikovrysi
  W  KATAFY N38 49.8500 E022 16.2300 Sun Dec 31 00:00:00 1989 09-NOV-01 22:45 Oiti refuge
  E  01
  
  R  02 KATAFYGIO-PYRGOS
  W  KATAFY N38 49.8500 E022 16.2300 Sun Dec 31 00:00:00 1989 09-NOV-01 22:45 Oiti refuge
  ...
  E  02
  

To create the GTWeb site the following steps are required:

1. Annotate the track log with location data using the program called near.

   near -w /pub/data/locations.txt way.way track.trk >ntrack.trk
   

2. Run the program timeline.pl.

   perl timeline.pl ntrack.trk pmeta.xml
   

Diomidis Spinellis home page

(C) Copyright 2001-2004 D. Spinellis. May be freely uploaded by WWW viewers and similar programs. All other rights reserved. Last modified: $Date: 2004/02/07 08:43:33 $