Dotspotting is easy:

Dotspotting is the first project Stamen is releasing as part of Citytracking, a project funded by the Knight News Challenge. We're making tools to help people gather data about cities and make that data more legible. The code for Dotspotting is available for download on Github, and licensed for use under the GNU General Public License.

Recent sheets:
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Nail Polish Postering NYC by emunkenbeck created on May 15, 2012
Oakland Taco Trucks by bauhauser created on May 13, 2012
untitled by dinvin created on May 9, 2012
2beFOUND Firmensitz by florian created on May 9, 2012
vehicle theft night time by nalra created on May 8, 2012
vehicle theft bus time by nalra created on May 8, 2012
Silo Coffee Store by Slo&Lo created on May 7, 2012
SF Vehicle Theft by nalra created on May 7, 2012
Wood and Waste for Gurfein Woodworking by jacqueline.e created on May 7, 2012
untitled by albert created on May 7, 2012
Sydney Culture by AEADaniel created on May 7, 2012
Lexington houses by hartleyhartley created on May 3, 2012
POPS NYC by ebrelsford created on April 27, 2012
10 ans - Localisation des stages by Floflo49fb created on April 26, 2012
Mid-Market, KRF funded by ericrodenbeck created on April 25, 2012
mid-market take 1 by ericrodenbeck created on April 25, 2012
Lifestyle eX: Videos by k_sullivan created on April 24, 2012
Flickr Photodensity (top 200 counties) by jeff created on April 24, 2012
Flickr Photodensity (top 500 counties) by jeff created on April 24, 2012
Popular Counties (on Flickr) by jeff created on April 24, 2012
Lifestyle eX: Photos by k_sullivan created on April 23, 2012
To the ocean and back with HH by ericrodenbeck created on April 8, 2012
Shanghai Red Line by aveclaudenum created on April 7, 2012
untitled by akaiving created on March 26, 2012
1000_FourSquare_Checkins by ManAboutCouch created on March 23, 2012
SF 311 by gaparicio created on March 20, 2012
SF Muni Stops by gian2477 created on March 13, 2012
BsAs_work path by vasqo created on March 13, 2012
SFMuni Data by gian2477 created on March 13, 2012
Fastfood restaurant by Jongsun created on March 13, 2012
untitled by mlekwok created on March 13, 2012
tokyo drive 1 by ballen450 created on March 13, 2012
Bayview 311 Reports by radiophonic created on March 13, 2012
Water Quality Monitoring Stations Bay Area by ce.sandoval created on March 13, 2012
Tokyo Free Events by andreahsieh created on March 13, 2012
untitled by rabeliakoff created on March 13, 2012
Chicago | CTA Fare Media Outlets by genniferem created on March 13, 2012
BART station by nalra created on March 13, 2012
walk top 200 by nalra created on March 13, 2012
Tokyo Arch Events by andreahsieh created on March 12, 2012
Test set by Jens created on March 12, 2012
Alternative streetnames by Jens created on March 12, 2012
Organismes by EverydataLab created on March 8, 2012
Ecobici Estaciones by seanp created on March 8, 2012
poster by EverydataLab created on March 8, 2012
omiami_project by seanc created on March 7, 2012
omiami_events by seanc created on March 7, 2012
Les Universités d'accueil des étudiants de Sc... by EverydataLab created on March 7, 2012
untitled by genniferem created on March 6, 2012
German's Walk by genniferem created on March 6, 2012