First, go to https://tasks.openstreetmap.us/projects/289/ and click Contribute.
Please double check which user you are logged into JOSM with. Ensure you are logged in under a dedicated import account so that it's easy for OSM volunteers to separate your normal edits from mass edits: a name like "jsmith_import" is good and obvious. You can do this by going to Edit > Preferences > OSM Server > Test Access Token.
If you haven’t contributed to a building import project before, please choose a task in one of the more sparsely populated parts of the county.
- Open JOSM and enable remote control.
- Click "Start Editor" to load the overall task area in JOSM. (You can use iD to validate a task, but *do not* use it to complete a task. Ask a project coordinator if you need help with JOSM.)
- Click the Tasking Manager link under "Specific Task Information" to load the import task’s data, which contains imported buildings from Sonoma County.
- Enable your aerial imagery of choice in JOSM, and offset it ("Imagery"→"New offset") to match the Sonoma County data. Bing and Esri seem to have the best imagery locally.
- Spot-check the added building ways’ geometries:
- If the actual building has been demolished, delete the way, or replace the building=* tag with a demolished:building=* tag to prevent it from being recreated based on outdated imagery.
- If the actual building has a new addition, and neither the Sonoma County data nor OSM include that addition, extend the way to include the new addition.
- Please avoid drawing your own buildings, roads, or other features from scratch as part of this project. If a building within your task area is visible in aerial imagery but isn’t in either the Sonoma County data or OSM, make a reminder for yourself to add it later under your own username or at least under a separate changeset.
- If many buildings are missing, such as in a newly built subdivision, or completely incorrect, end the task and add a note so we can revisit it.
- Spot-check the added ways’ addresses:
- If the street name in the address doesn't match the name of a nearby roadway, note the street name in the task comments (not the changeset comments) for further review.
- Run the JOSM validator. Ignore any warnings that don't involve buildings or addresses. Focus on the following warnings and errors that may be related to the buildings you have added:
- Crossing buildings
- Self-intersecting ways
- Building inside building
- Duplicate housenumber
- Housenumber without street
- Merge the imported buildings layer into the OSM Data layer by right-clicking on the layer.
- Run the JOSM validator again.
- There should be no significant duplicated/overlapping buildings with this import, but if there are, it's possible to use utilsplugin2 and the Replace Geometry command, OR the conflate plugin to resolve.
- To use the utilsplugin, select the worse building, hold shift, and select the better building. Then press ctrl+shift+G or More Tools > Replace Geometry.
- To use the conflate plugin, Configure it, select Reference (imported) geometry by going to Edit > Search and searching for all `building=* type:way new` data. Click Reference: Freeze. Then, select Subject (original) geometry by going to Edit > Search and searching for all `building=* type:way -new` geometry. Click Subject: Freeze. Finally, you probably want to use Simple, Disambiguiating, Standard <2,ReplaceGeometry,MergeTags.
- Run the JOSM validator again until all the building-related changes seem fine. Don't bother yourself with issues unrelated to the building/address import. You can be sure if something is your problem or not by enabling the Authors window and selecting the building: if it says `<new object>` it's yours, otherwise it's preexisting.
- Upload the data with the following information:
- Comment: `Imported addresses and building footprints from Sonoma County #sonomaimport`
- 80,341 new buildings would be inserted with addresses (green) (non-conflated, with addresses)
- This generally excludes the city of Santa Rosa as those addresses were previously imported as POIs with better accuracy and can be conflated at a later date
- 166,088 new buildings would be inserted without addresses (non-conflated, no address)
- Some of these we "have" addresses for, but have nulled so as not to conflict with Santa Rosa address POIs
- 32,581 buildings already exist and would not be inserted
Here are sample screenshots of Santa Rosa, the City of Sonoma, Petaluma, Sebastopol, and Healdsburg. Note the relative lack of conflated addresses in Santa Rosa due to the aforementioned POI import.
psql -d openstreetmap -U openstreetmap -W -h localhost -p 5432 -c "drop table if exists son_polygon; drop table if exists son_line; drop table if exists son_nodes; drop table if exists son_point; drop table if exists son_rels; drop table if exists son_roads; drop table if exists son_ways"
