OSM: Redo Urban Typology Areas as multipolygons

[batje]

1. Right down corner of the map (Miembeni) is missing the urban typology
2. Upper side of the map (Bwawani) is missing the urban typology
3. Limited access area is missing too Amelie has all the updated information to correct the urban typologies info in osm.

To make working on this easier in Josm

• In the File menu, choose "Download from OverPass API"
• use the following query:

`[timeout:25]; // gather results ( // query part for: “"urban:typology"=*” node["urban:typology"]; way["urban:typology"]; relation["urban:typology"]; ); // print results out meta;

; out meta;`

Make sure to tick the 'Download as new layer' box. This will download a new layer with only nodes/ways/relations that are marked with an urban:typology tag. You can edit things and re-upload. Please note there might be boundaries/ways that were supposed to be tagged but were not still in the OSM database. Please make sure to remove these as well!

The big note:

The way the typologies seem to have been done is by drawing each area as its own polygon. The real proper way would be for all areas to be a relation of type multipolygon where all the ways from corner to corner are the members of the relation. To do this:

• Go into Select Mode
• CTRL+click the polygon
• CTRL+click all the corners where you want to split the polygon
• Tools > Split
• click anywhere
• CTRL + Click all the new ways that you just untangled
• In the 'Relation' window, click 'Create New Relation'
• Move all the selections you see on the right, to the left
• Their role is 'outer', in most cases
• type of the relation is multipolygon
• here you set the urban:typology

Next All shared ways are duplicates at the moment, so you have to delete a lot. Use the validation tool to see how well you are doing.

Some quick notes:

• the institutional_complex should not need area=yes
• the grid_swahili_urban in the top right corner seems to be overlaying the much bigger organic_swahili_urban that it is in. Please use a Multipolygon with 'role=inner' to cut out this area

[MariekeOosterom]

I changed all the issues with names from arch. typologies and styles. Now I wanted to start with the urban typologies, but when I use the query, I can't see the polygons. They are there in JOSM, but I just can't see them. (when I do crtl + A you can see that I selected things in the selection list on the right) Can you maybe tell me why? :)

[batje]

• Try this:
• Open Josm
• File > Download from OverPass API
• In the first box, paste "urban:typology"=*”
• Make sure on the map, you draw a big square around Zanzibar City
• Download

That will give you only everything that is tagged with 'urban:typology'