[talk-au] Mapping Coastlines (Was: Re: Boundary removal.)

[Ian Sergeant]

On 2 February 2012 21:46, Andrew Harvey <andrew.harvey4 at gmail.com> wrote:

>
> I'm curious about how to map the coastline from imagery? The coastline
> is meant to be mean high tide, but with all those waves coming in and
> only a rough guess of where abouts in the 12 hr cycle the imagery was
> taken how do you know where to put the way?
>
>

If there is a man made seawall or barrier, I use that.  If not, I try to
estimate how high the water comes at high tide from the look of the
terrain.  If all we have is one image, then that's all we have.

Ian.
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