[Tile-serving] [osm2pgsql-dev/osm2pgsql] Generalization: discrete isolation: meaning of column values (Discussion #2422)

[Hidde Wieringa]

Thanks, this helps. One question.

In the manual, the discrete isolation value is documented as 

> Discrete isolation value. This is the smallest distance from this feature to all other features on the map in map units.

The linked paper lists in section "3.3 Discrete Isolation"

> The Discrete Isolation is the point’s distance to the closest point with a higher value, as Fig. 7 shows

So which is it: the smallest distance to all other features on the map, or the smallest distance to another feature with a higher importance value?


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