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gravitystorm / openstreetmap-carto

A general-purpose OpenStreetMap mapnik style, in CartoCSS
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Move wind turbines from Z15 to Z14 #4236

Open Gazer75 opened 3 years ago

Gazer75 commented 3 years ago

Seeing power lines and towers rendered at this level it would make sense to have wind turbines there as well. They are usually larger than a power tower.

imagico commented 3 years ago

Size and spacing of wind generators varies a lot. I can see a lot of cases where starting at z14 would not be advisable:

https://www.openstreetmap.org/#map=15/35.3304/25.7492 https://www.openstreetmap.org/#map=16/28.1654/-14.2490 https://www.openstreetmap.org/#map=15/35.0526/-118.2721

Obviously most modern offshore wind generators have a larger rotors and larger spacing and therefore the individual turbines could be shown at z14 - our focus is however more rendering on land.

Gazer75 commented 3 years ago

Oh wow! Didn't realize there were placed were they were so tightly packed and small. Could height be used? Most modern on shore turbines I know of are 145m+ tall and 300m apart. The new big ones are 180-200m tall. Smallest ones I could find in Norway were 100-125m tall.

imagico commented 3 years ago

Height is not frequently tagged on wind generators, somewhat ambiguous (with or without rotor) and practically hard to measure reliably for mappers.

Also keep in mind scale factor variability of the map - between Norway and Canary Islands you have more than half a zoom level scale difference.

Gazer75 commented 3 years ago

All obstacles of any size have to have a height for aviation that is publicly available here. The aviation obstacle database is open data in Norway.