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{ Monthly Archives } January 2010

Engauge Digitizer Tutorial

A simple walkthrough to use the Engauge Digitizer to pull values off a "printed" graph There's a far more complete manual that comes with the download, but these are the steps I used to generate the data for the webservices graphs. It assumes you've got a black and white image of the graph, with continuous […]

Digitizing graphs

I wanted to add Down Syndrome growth charts to the bililite.com webservices, but as far as I can tell, the charts are available only as images in the AAP's guidelines (and the original paper; subscription only). The often-cited growthcharts.com has charts, and Greg Richards was generous enough to share his data with me. However, some […]

Parsing the HTTP Accept: header

I wanted the webservices to be as RESTful as possible, so they should use the Accept: header rather than file name extensions to determine the type.