I paddled down the Whanganui River earlier this year, with a camera atop a gimbal for some timelapse phtoography. The first results can be viewed at: https://www.youtube.com/watch?v=nGwwDIJ7lRQ
I'm still trying to identify and place all the rapids. The picture attached shows the section between Whakahoro and Ohauora in Google Earth, with the names of the rapids and their positions as best I could determine from both the film and my GPS data. Unfortunately my copy of the Whanganui River Guide omits the names of the rapids from about #105 to #121, although I can reconstruct a number of the names from the text.
If anyone could help me out with the names of the others I would be very grateful. Alsso if my spelling could be checked. If the GPS data would be of any use, I'll put it up on my website as a download. Just ask when it will be available.
AFAICS a number of the 200 rapids between Taumarunui and Pipiriki should have their positions corrected from the data I was able to collect. I should be able to complete this before summer 2019/2020.