[OSM-dev] Data Consistency Checks

[Harald Kleiner]

Hi!

According to the task Data Consistency Checks on Things_To_Do-page I set up a framework that implements checking for errors and allows to give every issue some state information to see if errors are getting corrected. (In fact errors are stored in a table.)

What you get is a splitted tool: On the backend a plugin-based script does error-checking. It produces new error entries and new state information for existing errors. On the frontend users could be directed to errors that occurred in their area using JOSM or Potlatch and so errors could be corrected.

Error-checking procedures run on the database directly using SQL. I have done it this way for performance and flexibility reasons (and because my SQL-skills are much better than my RoR-skills...). The framework itself is implemented in php running SQL queries, so the scripts dont have magic inside - you could easily reimplement them using RoR...

I have already implemented some checks that looked interesing to me. Let me show you just three examples:

* Dead-ended one-ways
http://www.openstreetmap.org/?lat=48.2197604&lon=16.3590016&zoom=17

* almost-junction between roads
http://www.openstreetmap.org/?lat=48.3591848&lon=15.3883847&zoom=18

* non-closed areas (click Edit! the area is not displayed in the map)
http://www.openstreetmap.org/?lat=47.3929566&lon=11.6303181&zoom=13


Is there anyone (still) interested in such a framework (need more details)?

Kind regards,

Harald Kleiner

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