Sometimes we find in some cities/countries some boundary ways (the ones that define the political borders of provinces/towns/countries) that are missing some tag(not appearing already in the relations, because it’s better to avoid redundant data.

Example of boundary way without any tag:

For the renders and 3rd party apps that is not a big problem because that way is indide the the corresponding relations with different admin_level, it can be shared by one or many relations, but what happens if we need to add a tag to those ways based on the data from their relations?

The script is the following, based on Dmitri Lebedev’s osm2python library (not python3 compatible yet, help migrating).

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After few days of working with the quality assurance of the original OSM data extracted I finally finished the python script that generates the administrative boundary relations from level 5 to level 9

All the .osm files(original and results) can be downloaded here to check them out.

Here are the statistics and screenshots:

• Original ways: 7717 (between level 8 and some level 9)
• (after conversion) Splitted ways/segments: 21627

admin_level=9(in Indonesia: RT) 5006

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After having announced in the Indonesia and Imports mailing list about my intentions of fixing the current administrative boundaries in Jakarta, capital of Indonesia.

So the first I did was to download the boundary:administrative ways in Jakarta area, by using the following Overpass API rule while downloading in JOSM.

(way["boundary"="administrative"];node(w); way(bn);); out meta;

Total boundary:administrative ways: 7809 of admin_level = 9 ways = 5082 of admin_level = 8 ways = 2717

I analyze the data and soon realize that there is a lot of overlapping ways, unjoined nodes with similar coordinates, and some areas that contain ways of admin_level=9 doesn’t have the father way of admin_level=8

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Hi everybody, apa kabar?, this is my first post in OpenStreetMap so I’m quite excited.

My name is Ivan Garcia and I’ve been contributing to OSM since many years now, I am currently living in Yogyakarta Indonesia where I do digital volunteering for various projects. I am an opensource python programmer and I love useful is OSM for the world, no wonder we all feel contributing back to the community when we have free time.

I realized that HOT Indonesia contributed adding most of the administrative boundaries of the Jakarta province in order to make a program for disaster management(flood related), my thumbs up for that team and their tremendous efforts, here is their blog

I see those boundaries have an obsolete OSM format to represent the boundaries, that is, still using the obsolete is_in tags, instead of the new boundary relations.

You can take a look at here:

osm.org/#map=17/-6.172219373575377/106.8088689627239 Boundary RW03 duplicates way with RW06

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