An isobar display instead of individual info points has been a goal in pressureNET for a long time. Giving the user enticing visual feedback is part of making the app more broadly appealing.
Glad to hear it. I did some work in this but plotting PM & Ozone data on an android device, I had never done anything remotely similar before and had a hard time finding any good options besides going out and writing my own charting system. I ended up using a heatmap style plotting system. Looked good but it was very hard to get the colors to match up to any particular scale. I hope you end u with better results then i did :).
https://www.dropbox.com/s/7jvx3iboil7noaw/2012-04-04%2014.41...