My team and I at falconcrest.org have identified 1,000+ locations from "Falcon Crest", and it's been my hobby to track down locations. The movie industry has a tendency towards reusing many of the popular filming locations, so some of them look really familiar from various productions after a certain time. I also know many parts of L.A. quite well, particularly in the neighborhood of Lorimar Studios (now Sony Pictures Studios) in Culver City, CBS Studio Center in Studio City and Warner Bros. in Burbank. When I saw the few houses in the scenes with Karen and Gary as well as Richard, I immediately knew from my previous visits to the cul-de-sac that they are in one of the streets around -- Google Street View was helpful to identify the correct street and house numbers.
I wished I could identify all missing "Knots" locations, but I'm trying to do my best to gradually cover all the locations I can identify. Of course, shooting schedules and call sheets would help, but our archives of Lorimar's production documents are limited to "Falcon Crest" only for the obvious reasons. In case anyone has a "Knots" collection of production papers, it would be fun to get in touch.
It may take a while, but whenever I have time to revisit "Knots Landing" episodes, I'll be happy to continue posting.