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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untitled by jadmaps created on April 10, 2014
untitled by rpsamaan created on April 10, 2014
MRFs in LA by JackieC created on April 10, 2014
laane by RostenRosten created on April 10, 2014
MRFs in Southern California by RostenRosten created on April 10, 2014
RPA4907 / UAL1655 2014-04-06 by blech created on April 8, 2014
SKW4965 2014-04-03 by blech created on April 8, 2014
Test Map by roydiddy created on April 4, 2014
Reports of Noisy Parties in San Luis Obispo, CA by chadbunn created on March 24, 2014
Remote employees by rgriffith@evolenthealth.com created on March 20, 2014
Fires in San Luis Obispo Unit, 2011 by chadbunn created on March 20, 2014
SF Parklet Map by kalin1vt created on March 8, 2014
Police Blotter by k_sullivan created on March 3, 2014
The leith by weekoneproject created on February 20, 2014
New Exp. by weekoneproject created on February 19, 2014
Sweet shelter. Tessa, Cayden, Sara, Philip. by weekoneproject created on February 19, 2014
untitled by weekoneproject created on February 19, 2014
Padlock by weekoneproject created on February 19, 2014
super group by weekoneproject created on February 19, 2014
untitled by weekoneproject created on February 19, 2014
The view by weekoneproject created on February 19, 2014
untitled by weekoneproject created on February 19, 2014
Willow Bank by weekoneproject created on February 19, 2014
Graffiti (Lisa, Laura, Sarah) by weekoneproject created on February 19, 2014
Rad location by weekoneproject created on February 19, 2014
Dunedin's finest by weekoneproject created on February 19, 2014
Intercity Bus Depot by weekoneproject created on February 19, 2014
Saint Kilda by weekoneproject created on February 19, 2014
St Clear Beach by weekoneproject created on February 18, 2014
SWEET SPOTS - DUNEDIN by weekoneproject created on February 18, 2014
untitled by weekoneproject created on February 17, 2014
Caltrain ridership by blech created on February 5, 2014
FP Map by Stefanee79 created on January 16, 2014
FP by Stefanee79 created on January 16, 2014
Top Medium Sized Cities rev by g015yilian created on January 15, 2014
Top Medium Sized Cities by g015yilian created on January 15, 2014
untitled by mattknutzen created on January 9, 2014
untitled by mattknutzen created on January 9, 2014
untitled by nhsnelling created on January 6, 2014
Dot Map Showing Sri Lankan Diaspora by dingo23 created on January 5, 2014
Test Cities by zjdoman created on December 19, 2013
gmaps2 by igallina created on December 19, 2013
gmaps1 by igallina created on December 19, 2013
Centroids for Atlas by jde123 created on December 10, 2013
Mid Market by ericrodenbeck created on December 5, 2013
burritoeater by Burrito Justice created on December 3, 2013
Grassroots Bioblitzes 2013-2014 by danrademacher created on December 3, 2013
Bioblitz Observations 2013 by danrademacher created on December 3, 2013
Broadsided Press Vectors by broadsided press created on November 14, 2013
untitled by steveleathers created on November 13, 2013