[CD/PL][73483944] Limit numbers on map requests

For miles and the various latitudes and longitudes, limit their scale to
4 digits after the decimal point. In apps like AG, this should help
caching, since there should be less variation in similar requests.
Merge pull request #6 from primedia/73483944-limit-scale-of-numbers-on-map-listing-and-pin-requests

[CD/PL][73483944] Limit numbers on map requests