that's some seriously comprehensive side-street stumbling.
-the red "+"s are locations where you had GPS lock, but saw less than an 1 network at any given occasion during the sampling period. there a black "dots" in JiGLE that correspond to these, and i should probably switch the color for these over the black for clarity and consistency's sake.
-beyond that density, line thickness and color changes. line segments are drawn from the last sample to the location at the end of the sampling period. their color ranges from red (1-4 networks) up to blue (an average of 32 networks) depending on the average number of networks visible at each point during the sampling period. the lines get up to 16 pixels thick, so the thickness increments based 2 networks increments.
suggestions have been made to associate thickness/color seperately with total density and new-network density, but we haven't come up with an intuitive scheme for this yet.
with my rig (amplified, external antenna, orinoco + ns 0.4.x) in most cities i find areas of 10-16 network densities quite frequently (the yellow to green range in the color scheme). in downtown chicago i occasionally see a big, deep-blue dot, and i know i've found the motherload.
