Show street names at higher zoom levels so people can easily find the longest line of sight from precisely where they live. Exact locations make a big difference in a hilly place like Seattle.
See https://www.reddit.com/r/rust/comments/1r00jsi/algorithmically_finding_the_longest_line_of_sight/o4h92yo/
See https://www.reddit.com/r/rust/comments/1r00jsi/algorithmically_finding_the_longest_line_of_sight/o4h92yo/