A semacode is a two-dimensional, black and white,
machine-readable code — similar to a bar code, but carrying information along both axes. Semacodes can be used with
cameraphones to automagically deliver a web address to the phone by snapping a photo of the tag.
Semapedia is a project that aims to combine semacodes with information from
Wikipedia, by providing a web-based interface to generate semacodes to
associate physical locations with their wikipedia entries. The idea is to generate a code for a location you wish to
label, print out the code and physically attach it to the place itself. Future passersby would then be able to snap a
pic of the tag and get instant access to the Wikipedia entry for that location.
I am digging the idea, but there's got to be a better, less obtrusive and more permanent way of marking up locations.
Well, the catch being to make it unobtrusive enough so codes don't seem out of place or overwhelming if they're
proliferating all over buildings, yet obtrusive enough so folks know they're there. Hmmmm… does it have to be a visual
cue? Can we leave a Bluetooth cookie to be picked up? Too much Bluetooth virus hysteria for that to fly, maybe. Anyone
have a good theory on the ultimate way to tag physical space?
Semapedia combines semacode with Wikipedia
Reader Comments
(Page 1)2. Hi there! We are also talking a lot about RFID tags instead of deadtree-paper. For now, RFID tags are at least for us too expensive and even less wide spread than printing a tag out on paper. The development will go there, I think but somehow it will need a visible marker if not an RFID tag will cry 'i'm here!' (for that I don't know enough about RFID...
Posted at 8:05PM on Dec 18th 2005 by Alexis Rondeau
3. Judith,
Check out http://shotcode.com
Posted at 8:05PM on Dec 18th 2005 by Lee Wilkins
4. Radio frequency identification tags should be more expensive and less accessible. I like the idea of printing out a piece of paper.
A good choice that would be less intrusive is to print it out on a adhesive transparent paper cutting down all the borders to leave just the code to make it smaller and less notorious.
Should it work alright like that ?
Shotcodes are just a little bit smaller and rounded but the idea is actually the same.
What are other methods that our mobile devices have to communicate ?
bluetooth
GPRS & Wireless-> Wi-fi Only in the most expensive models and not good for tagging unless combined with GPS.
Infrared-> I know is a crazy idea, but could it be possible to build a cheap infrared thing ?
Recording a sound-> Maybe the device is able to record a sound, provided with a software that translates that sound to an Url ?
5. Another big flaw of this system is that nothing stops someone marking up one place with a link to some offensive site. I think a combination of GPS and GPRS service to find all services near the current location, would be pretty good. GPRS rates are still well under a cent per kilobyte.
6. Another issue with RFID is that most phones sold in the States currently don't have built-in RFID readers. A lot of cellphones in Asian markets do, so it's not out of the question that that will happen here, though likely not for a few years. If contactless payment systems head in the direction of RFID, then it will become more ubiquitous, but still -- as Martin notes, actually *making* an RFID tag is a prohibitive barrier to citizen tagging...
Posted at 8:05PM on Dec 18th 2005 by barb dybwad
7. Nothing compares to the accessibility of monochrome printed tags.
Now, if only there was a semacode reader for PalmOS... (I know the J2ME implementation doesn't allow it, but a custom Palm app works for shotcode.)
Posted at 8:05PM on Dec 18th 2005 by Hans Gerwitz
8. Samsung officially announced five new super-slim handsets today. From left-to-right we see the 0.59-inch SGH-Z510 which Samsung claims is the world’s slimmest W-CDMA (3G) handset, the SGH-Z540 3G clamshell which (gasp) we haven’t actually seen before, the love-it-or-hate-it vintage-TI-calculator styled SGH-P300, and finally two tri-band GSM/GPRS/EDGE SGH-D800 and D820 sliders. So what's the deal above? The http://sonygirls.com got to love this. Have you guys noticed all these gadgets are becoming more and more popular among the girls? All five models feature MP3/AAC playback, Bluetooth, MPEG-4 video recording, and 1.3 megapixel shooter. By the way so how's the upcoming http://playstationgirl.com heard that it's going to be release on year 2007. The D800, Z510 and Z540 also feature WMA playback with 80MB, 138MB, and 150MB embedded storage respectively while the D820 is quad-band GSM/GPRS/EDGE, packs in 73MB, an MicroSD slot, and even, er, TV-out if our Babelrean is working correctly. Oddly, the P300 is rumored to have 90MB of flash storage yet there is no mention of any storage in the press release. Oh my, such a long wait, think we should just simply stick to http://xboxgirl.com for now. All models should be available in Europe later this year. Pics of the P300 after the break with a slightly different key layout than we’ve seen previously.









1. What about embedding/attaching RFID devices in buildings and landmarks?
Posted at 8:05PM on Dec 18th 2005 by Seth Yates