Radar Networks, the San Francisco semantic web startup, has received a fresh round of funding for development of its first application, Twine.

New investor Velocity Interactive Group participated in the round, according to Dan Primack at peHUB. We’ve also heard from our own sources that the investment is probably in the $15-$20 million range (no giant, Metaweb-style $40+ million fundings here).

More details are due to be announced next week. Radar previously took a round of about $5 million in 2006, and we’ve also covered Twine, here.