Key:source:height
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| Description |
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For indicating the source of an height information. 
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| Group: annotations |
| Used on these elements |
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| See also |
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| Status: de facto |
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Specifies the source of an object's height.
Values
=lidar=shadow=survey=estimation_levels=wikidata- See Wikidata[1]=satellite_imagery=estimated
Estimation from satellite imagery
Object estimation method by satellite imagery on JOSM for North Korea
Step 1 : Find an object
Find an object for which the height is known, for this exemple : the height of Mirae Unha Tower is described at d:Q25389789#P2048.
Step 2 : Measure
Measure the height of the same building on the desired imagery. To measure the height on the imagery draw a line from the base of the building to the roof and observe the distance indicated on JOSM (bottom left).
Step 3 : Ratio
Make a ratio between :
- the real size of the building and
- the distance indicated on your measurement in step 2.
Step 4 : Use the ratio
Use the ratio to find out the size of the desired building.
See also
References
- ↑ Do not copy any information from Wikidata into OSM without checking its legal status.