I've updated the Chaucery
Weather Chart to incorporate my recent experimental
interactive Weather Chart. The standard chart is a static image, and is suitable for all browsers. The interactive version lets you use your mouse pointer to read temperatures and times. This makes it easier, for example, to see what time the temperature has been peaking for the past few days. As this relies on the canvas element it only works on recent modern browsers such as Firefox and Safari (but not Internet Explorer).
Technical Notes
To do this integration I needed to plot some pixels in my chart image but outside of my chart. The chart is generated by
JpGraph. As this is a graphing library rather than a general drawing tool it does not provide for arbitrary plotting of points. However, it does allow for adding text strings of any size. I therefore achieved the desired outcome by plotting characters of 1 point font size.