Category Archives: Geo

Geographic, mapping and locative hacks.

Querying Linked GeoData with R SPARQL client

Assuming you already have the R statistics toolkit installed, this should be easy. Install Willem van Hage‘s R SPARQL client. I followed the instructions and it worked, although I had to also install the XML library, which was compiled and installed when I typed¬†install.packages(“XML“, repos = “http://www.omegahat.org/R“) ‘ within the R interpreter. Yesterday I set [...]

Local Video for Local People

OK it’s all Google stuff, but still good to see. Go to Google Maps, My Maps, to find ‘Videos from YouTube’ listed. Here’s where I used to live (Bristol UK) and where I live now (Amsterdam, The Netherlands). Here’s a promo film of some nearby art installations from ArtZuid, who even have a page in [...]

Fireeagle IRC bot / OAuth / Dopplr

I noticed people in #geo playing with a fireeagle bot earlier, so I had to try too. danbri: fireup, help? [13:29] fireeagle: danbri: I have just sent you a URL in privmsg, please click on it to authorize. [time passes... things happen behind the scenes...] [13:31] danbri: fireup Leiden, Netherlands [13:31] fireeagle: Updating danbri to [...]

AllegroGraph RDFStore 3.0: Social Network Analysis

AllegroGraph 3.0 now comes with a Social Network Analysis component, amongst several other interesting features including improved geo support. By viewing interactions as connections a in graph, we can treat a multitude of different situations using the tools of Social Network Analysis (SNA). SNA lets us answer questions like: How closely connected are any two [...]

Geographic Queries on Google App Engine

Much cleverness: In this way, I was able to put together a geographic bounding box query, on top of Google App Engine, using a Geohash-like algorithm as a storage format, and use that query to power a FeatureServer Demo App Engine application, doing geographic queries of non-point features on top of App Engine/BigTable. Simply create [...]

Open CellID databases

Via momolondon list: opencellid.org data dumps The readme.txt file describes the tabular data structure (split into a cells, and a measures file). I think the cells data is the one most folk will be interested in re-using. Table headings are: # id,lat,lon,mcc,mnc,lac,cellid,range,nbSamples,created_at,updated_at For example: 7,44.8802,-0.526878,208,10,18122,32951790,0,2,2008-03-31 15:22:22,2008-04-07 08:57:33 This could be RDFized using something similar to [...]

Google Earth touring via KML

While I’m writing up old hacks, here’s one that I really enjoyed, even if it was a bit clunky. A couple of years ago Mikel Maron implemented (on my urging in irc.oftc.net #geo IRC :) a PHP-based Google Earth touring service, which interconnects a “tour guide” user with “tourists”. This site facilitates collaborative, realtime exploration [...]