The National Broadband Map has some neat maps. For instance the speed test one shows that real speeds are slower than advertised ones in my area (but surprisingly in some areas they are actually slower than real speed).
There is an amazing website Urban Research Maps that lets you see how racial demographics have changed on a block level over the past ten years - between the 2000 and 2010 census.
It has data for only part of the United States, but this data includes PA, NY and several other major states.
My neighborhood in 2000
ArcGis Online has some neat maps like
this one which fits Americans into nice marketing categories. You can zoom in to the block group level (Census data category) and get detailed information about your community!
SoilKitchen.org organized free lead tests for a week. They tested over 350 samples, primarily from Philadelphia.
About 10% of the samples had > 1000 ppm lead (the point at which it becomes not so good for growing vegetables).
I color coded the markers based on lead levels and created this map:
The government has an interesting Food Environment Atlas that lets you map things by county.
One neat layer is pounds of fruits/veggies eaten at home per capita. They also have grocery store access, food prices, and a lot more!
The NY Times has come up with a new map using Census data on income, race, housing, same sex partners, and education. Nifty interface!
The data is from 2005-2009, the American Community Survey, which is happens in-between the major decennial census.
They display the data at the census tract level if you zoom in. I cannot tell if they are trying to show block level data - as they have dots representing data on blocs, however I don't think the American Community Survey does blocks.
Income, race, education, health, political participation and more -- all presented in a user friendly format.
The only downside is that their smallest area is a Congressional District. They should have done zip codes! More work, but so much more logical.
I've got heat maps working for operating coal, nuclear, gas, biomass, hydro, and municipal solid waste incinerators.
I broke the lower 48 states in the US into around 700,000 grid squares. Roughly 3 x 3 mile.
You can see the heat map with the markers that link to more detailed facility information, or without them.
There are three different levels of color saturation which let you decide whether to show a map saturated with facilities, or a "points of light" view.
This is my first take on mapping income near the Detroit Incinerator.
They are going to have a big protest of the facility during the US Social Forum.
1999. I copied and pasted FactFinder images together for the 482xx
series of zip codes. You can see that the incinerator (marked as black
I am working on displaying zip codes in Google Maps for the Energy Justice Network power plants map. I'm using ZCTA (zip code) shape files that come from the Census Bureau. You can convert them from shapefile to kml using Geocommons. Unfortunately I need to do this for all 50 states - so it will take a while.
Now the really CRAZY part was that I was unable to get my KML files to show up in Google Maps. They showed up fine in Google Earth.