« The need to think about what you're seeing: an incomplete geography lesson | Main | Two good maps, considered part 2 »



I live thousands of miles from Brooklyn, but I googled, and the asterisks are exactly what they look like. Each arm of the asterisk is a square tower block of about twelve stories.


Gold and Sands


No need to live near Sands St. Google maps with satellite view will confirm that they are in fact asterisk shaped buildings.

Thank you for the posts through the year. I was involved in a class on statistical consulting last year and feel that I should have made more use of some of your material. It is an excellent exercise to go through the steps of starting with a ridiculous chart and producing something that is useful.


Even in non-satellite view, Google seem to have the same data set that lets them represent the buildings as shapes on their map.

Kees Duineveld

Did you ever see this Dutch map? http://citysdk.waag.org/buildings/


Derek, the local government will have this information, as they are involved in the planning process, and by this stage will have it entered in a Geographical Information System (GIS). They can then either sell or give the information to others to include in their maps. Mapping authorities also have similar information that they have entered from aerial photos.

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.


Post a comment

Your Information

(Name is required. Email address will not be displayed with the comment.)


Link to Principal Analytics Prep

See our curriculum, instructors. Apply.
Marketing analytics and data visualization expert. Author and Speaker. Currently at Columbia. See my full bio.

Book Blog

Link to junkcharts

Graphics design by Amanda Lee

The Read

Good Books

Keep in Touch

follow me on Twitter