| 18 Jul 2024 |
|  FikriIrvan set a profile picture. | 14:33:43 |
| FikriIrvan | I have previously conducted mapping of buildings under tree canopy. Here are some suggestions for you
1. If you have local knowledge of the area you are mapping, do not hesitate to create building polygons under tree canopy.
2. If you are able to be in the location you are mapping, it is better to use field papers. This will be very helpful for you and will provide better data
3. If you don't have local knowledge, you can first look at the outer edge of the tree canopy. Buildings that are larger than the tree canopy will usually be slightly visible. Add buildings with a square shape (assuming that most buildings are square/rectangular).
4. To maintain the quality of OSM data, if a building is completely invisible (under the canopy) and you do not have local knowledge or have not conducted a survey, the answer is not to map it. | 14:33:44 |
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 Gregory Peony | Check all imagery sources in the area. Since you haven't provided a screenshot here I don't know what you're looking at, but imageries may be taken with various nadir which may allow you to get a peek at buildings which are entirely obscured by others. This will probably mean that the age of the imagery is different, but it may be better than nothing. Perhaps LiDAR would work: provided you have access to it.
I'm not very experienced with field mapping. You may find it beneficial to have some nearby features already digitized. Maybe some reference geometries beyond outside of the canopy would be useful. GPS may not be super accurate under the canopy; if you intend to use it, then I recommend aquiring your location/signal before you enter the canopy and at regular intervals during your mapping. you may find the pick your mapping technique section of https://wiki.openstreetmap.org/wiki/Beginners%27_guide useful. There are probably some other guides out there somewhere. | 15:21:50 |
| Gregory Peony | If you're in here looking for armchair mapping support, then this event may be of interest to you. https://osmcal.org/event/2722/ | 15:37:13 |
| 26 Jul 2024 |
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