I understand that the SonarChart data comes from user submitted data, but I wonder if that data is rife with errors. Maybe the users set up their sonar wrong or something to contribute to the faulty data? As your screen shots prove, they're highly inconsistent. There is no 37 foot hole just south of the words Marion Lake nor along the western shorelines. Based on my experience on the lake with my sonar in my boat, the Navionics data is more accurate than the Sonar Chart, so I'm not seeing the value in the $4.99 yearly subscription to the user submitted data. I guess I'll have to evaluate on a few different lakes and see, maybe it is just a problem with the data for Marion, I just expected that the user submitted data would be more accurate, not less accurate
On a side note, I noticed I could refresh my map update and that at least got rid of the data with the 51' depths, but it still looks like your screen shot on the right. I'll keep checking for updates in hopes of better data come summer.
I will be up there next week from Austin Texas. Can anyone comment on the lake and how safe it is after the warm up? I thought it would be very unsafe but I saw a truck on the ice plowing an ice rink this morning on one of the web cams. Is there still plenty of ice and is the lake in pretty good shape now that is has turned cold again? Maybe it is in better shape then before the cold? I grew up in the area but that was 30 + years ago so any schooling on the ice would great.
Thanks for any comments.