You pull a trout out of Montgomery Reservoir. It's a nice fish. But how much does it weigh, and is it a keeper? Most anglers guess. This app does the math.

Montgomery Reservoir sits at 10,900 feet in Park County, Colorado. The river inlet is where the fish are. I've been coming here since I was a kid, the cabin my grandfather built is about a half mile up the road. Rainbow trout are the main catch. The chart on the next slide shows typical length-to-weight data for rainbows in high-altitude Colorado lakes. Pretty useful for knowing when you've got a keeper.

Assignment for "Developing Data Products" at Johns Hopkins University