pa7/heatmap.js — pull request #82 by peluja1012 (2013-10-03 21:40:37+00:00)
Title: Add minOpacity configuration option to heatmap.js and to heatmap-leaflet...

I needed more control over the alpha of data points drawn in order to make the heatmap more visible. Therefore, I added an optional minOpacity option, which sets the lowest possible alpha value that the heatmap will render. If set, the minOpacity option allows the user to make data points with low count values more visible (higher alpha).