[postgis-users] DE-9IM pattern string for end of a line meeting start of another line

[Martin Davis]

The DE-9IM model isn't able to express line direction.

On Mon, May 9, 2022 at 11:42 AM Shaozhong SHI <shishaozhong at gmail.com>
wrote:

> The DE-9IM pattern string for two lines meeting at both end is found to be
> FF1F0F1F2.
>
> Is it possible for DE-9IM to have a pattern string for end of a line
> meeting start of another line?  Namely, they share a node.
>
> Regards,
>
> David
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