• Explore different color bars in hope of finding something better
• Find good shapefiles
• Develop a simple test suite for PNG manipulation
• Write code to create PNG from one known polygon extracted from shapefile; overlay on Google Maps
• Write code to create PNG from several known polygons extracted from shapefile; overlay on Google Maps
• Write code to create PNG from several known polygons, shaded with data from dBASE file; overlay on Google Maps

• Given zoom level and map lat/long boundaries, figure out how to tell which polygons are visible
• Write code to retrieve a polygon based on lat/long.
• Write code to create PNG from lat/long boundaries at default zoom level
• Figure out how to aggregate data from multiple polygons
• Write code to aggregate data
• Modify code to create PNG from lat/long/zoom data
• Overlay images dynamically on Google Maps

• (aggressive) Add sliders to allow changing the parameters of the image (e.g transparency, hue)
• (aggressive) Add radio buttons to change data sets
• (aggressive) Allow user to choose from several different years of data

Things to note in the report

• What color scale? Used Color Brewer as a starting point, but opacity meant that their colors weren't really right. Bumped up the saturation considerably, colors still hard to distinguish. Perhaps go for lots of indistinguishable steps?
• What is the performance? Will this scale? How many resources would be needed to show the whole US, and at what cost?
• Users get to keep context since map visible underneath.