Talk:Import/Catalogue/N50 import (Norway)

Deviations from N50 raster map

It seems the N50 Topo raster map (the preset in JOSM) often deviates from the data coming directly from N50. The example come from a non-simplified n50osm.py import.

Example: https://i.imgur.com/21kmixq.png

1. The path of the river is not exactly the same 2. Waterareas not included 3. Missing stream

Mostly out of curiosity - do anyone know why this is? I would think the N50 map was based more or less directly on the N50 dataset, but this is maybe not correct. Or maybe they have improved the dataset without releasing the update yet?

--Olejorgenb (talk) 11:38, 19 August 2023 (UTC)

The topo raster map is N50 down to zoom 15 only. At more detailed zoom levels it is rendering FKB.--NKA (talk) 12:32, 19 August 2023 (UTC)

Ah, that explains it. Thanks :) I guess it's not ideal that the FKB zoom levels are shown in JOSM? I thought FKB was not allowed to use? Or is tracing different from structured imports? The imagery layer imply that it's ok to use ("permission-ref") --Olejorgenb (talk) 12:53, 19 August 2023 (UTC)

My interpretation is that it is ok to trace from FKB raster, based on its licensing information at GeoNorge. However, the underlying vector data is not open.--NKA (talk) 13:16, 19 August 2023 (UTC)