@Dziq Asked on the discord forums about the size of the San Francisco area. I thought it was around 140km square, but its not 
Its 240km East<->West and 270km North<->South.
The accuracy is not great - its been optimized to have a fairly small data set. Originally it was weighing in at around 200MB. Now its down around 9MB uncompressed. I hope to have weapons, targets and some missions ready over the next day. With some improvements to the map.