I live in a neighborhood with 3 house styles; each has a fixed number of floors. The townhomes all have 8’ ceilings, a basement, 1st, a second floor, and an attic or loft. All basements are walkout so i count them. I-joists are about 18 inches. So the townhomes are ~ 11 meters.

The single family are basement, 1st, and second, with 10" main floor and 8" second floor, then they have 16’ attics, which puts them ~ 13m

The apartment complex has 5 fixed floors. It was trickier because I don’t know the internal structure, nor the height of the decorative crowns, so I took a Google Earth look at the side of the building, drew a 45-degree line down from the top, and measured the bottom of the triangle

When you make an area->structure in osm, you can add it in the height meta in meters.

When an app uses the OSM data to draw a 3d structure, it can use your height data. (and most appear to)

I was using organic until CoMaps forked it, now CoMaps is the way. It’s open street map so you can sign up and fix whatever you want, pull down the next version and it’s there.

I do miss street view, voiced street names, and really miss cowdsourced hazards from waze but it’s worth it if you’re not on a long high speed trip.

edit: turns out you can turn on tts street names

I completely fixed my neighborhood of 800 homes. took me a week. I drew in the house shapes and the heights, turned the row home blocks into individual linked blocks with exact addresses and accurate sidewalks.