a thematic map in which areas are shaded (or patterned) in proportion to the measurement of the statistical variable being displayed on the map, such as population density or per-capita income.
The choropleth map provides an easy way to visualize how a measurement varies across a geographic area or it shows the level of variability within a region.
In February/March 2013, the Coalition will release its first-ever “Hunger in Pennsylvania” report, publishing the most comprehensive data and analysis available on hunger and poverty for each of the state’s 67 counties. In addition to producing a hardcopy report that would be downloadable online, the Coalition would like to create an interactive hunger map of Pennsylvania’s counties—a tool that would undoubtedly raise awareness and increase engagement in the issue of hunger among members of the public, media and government.
Hunger exists in every community in Pennsylvania, and there are many programs that can help, if we ensure that all people have access to them.
This online interactive map is intended for a combination of Pennsylvania audiences—the media, anti-hunger organizations, social service agencies, educators, policymakers, as well as members of the general public.
These will be displayed in a window on the top right-hand corner of the map
Gills Sans is NOT websafe :(...
Aparently there has already been a study performed on which colors you should use on a Choropleth map. These schemes have already undergone extensive user phycological testing. Lucky for us the color we would want to use REGARDLESS actually matches the company brand colors almost EXACTLY - lucky us: colorbrewer2.org
(truely the best resource for this project - period)
(from which we found leaflet)
(perhaps the BEST model to go from)
(when we all grow up and can be real designers, we might make something that is somewhat this cool)
Free, easily accessible geo-json geometry files for the world.
For a good time, drag them to http://bl.ocks.org/1431429 and paint the globe!
These are geoJSON files holding all county geoJSON data in one file.
The accompaning information with the geoJSON coordinates differs from what is available at world.geo.json. There is some difference in the labels used to reference the data. At least you have all of the coordinates all together in one file already. If you are looking for a more pure source of geoJSON data try GitHub:world.geo.json
Psychology behind choosing your choropleth color scheme, and a tool to help you do it the right way.
...and execute events on those elements added.