Join Date: Apr 2010
Thanked 0 Times in 0 Posts
Rep Power: 6
Yes, me again. No, I don't comment on everything. I got to this forum cause I liked what you said on BFS.
So, here's some thoughts:
I'm sure you know the simple stuff, others may not.
"Raster" charts are digitized scans of paper charts (basically).
Looks exactly like a paper chart. In the US it's possible to download current raster charts for free. They're actually pictures of charts. To update one, you gotta reload the whole thing. These can be used with a bunch of different software on a pc.
"Vector" charts display digitized information. In other words, every depth,
mark, rk, etc. is part of a data base. There are a bunch of different kinds, and ways to display them. They may, or may not, be compatible with different software and machines. Cost more. Easily updated because corrections are small amounts of data.
I know little about recreational, small display, proprietary, non-pc stuff.
From what I've seen - mini chart displays/systems are.... uh, hmmm
not cool! I'll leave it at that.
Nav software is a thing to consider. Most pc based stuff can display both raster/ vector. It's all based on the same data. Really, accuracy is not usually an issue.
Are raster charts available for free down under?
Have you looked at software?
Commercially, I've worked with a bunch of this stuff - since it started. On my sailboat - I run raster. they're free and good enough. It's convenient and fun at times. I always have a paper chart.