Length of polyline in pixels

[Pil]

I need to get the length of a polyline in pixels to cut off 10 or 20
pixels at the end of the line.

Looking for a simple and short way to do that.

[Pil]

Hmm, I see, that's no easy task, there is a lot of math necessary.

That's not worth the effort. Sorry for the noise.

[Chris Broadfoot]

You could find the approximate length (in metres) of 10px at the desired latitude, and then chop that length off the polyline.

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http://twitter.com/broady

On Wed, Jul 13, 2011 at 10:06 PM, Pil <wol...@gmail.com> wrote:

Hmm, I see, that's no easy task, there is a lot of math necessary.

That's not worth the effort. Sorry for the noise.

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[Pil]

Thanks Chris,

meanwhile I know how to calculate the pixel length of a polyline,
based on Pythagoras' theorem

http://www.wolfpil.de/v3/arrow-heads.html

On Jul 27, 1:03 pm, Chris Broadfoot <c...@google.com> wrote:
> You could find the approximate length (in metres) of 10px at the desired
> latitude, and then chop that length off the polyline.
>

> --http://twitter.com/broady