[Tagging] Basic cartography features missing, why?

Tomas Straupis tomasstraupis at gmail.com
Sat Nov 7 12:52:01 UTC 2020

2020-11-07, št, 14:37 Jeremy Harris rašė:
> Alternatively, could the rendering job be done by the client needing the
> out-of-date tile, and resubmitted to the server?

  As Mateusz has pointed out, this has already existed, but one of the
reasons it was discontinued (along with the lack of interest) was that
it meant you're rendering and rerendering a lot of tiles which nobody
needs. Renderer must be connected to actual usage of the map.

  Another thing with rerendering (and it actually is a problem for
both client and server rendering) is segmentation. When doing
generalisation a lot of things aggregate, so even when nothing changes
on your particular square (data-wise), result could change because of
changes in neighbouring squares. There are a lot of segmentation
strategies to be used depending on types of objects being worked on
(and types of generalisation operations being performed on them), but
it is not as simple as current usage with osm2pgsql generating dirty
tile list.

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