I am involved in a precise positioning project that uses Real Time Kinematic (RTK) for cm-accurate positioning. We use unattended base stations that provide real-time corrections for mobile rovers. The corrections can be used within a radius of about 10-20 km around a single base station (rover positioning precision degrades with greater radius) and need a data feed of about 1 kB/s. Currently mainly mobile networks (GSM, 3G, LTE) or ISM bands are used to transmit the corrections.
My question is whether ham radio could be potentially used to transmit RTK corrections from either temporary or permanent base station(s) for non-commercial purposes. The RTK corrections would be publicly available for anyone to use with an unlimited number of rovers in given area. Multiple overlapping base stations could be used for greater area coverage.
Should ham allow the broadcasting I think this may expand globally since 1) it would be very useful public service, 2) receiver equipment would most likely be cheaper (no GSM data etc.) and 3) the range and reliability would be greater than with ISM.
The territories of interest are mainly US and EU (but others welcome too). Of course proper amateur radio licenses would be obtained for broadcasting. The frequency and power used has not been defined yet but should allow for a reliable NLOS propagation.