Measure and compare data quality between two time periods

[mataharimhairi]

Measuring the quality of OSM data is something that has come up on several projects. A possible way of calculating this, is to do a simple feature count and run the error tool in JOSM on data captured from two different periods, using percentages.

This is generally done manually, but would it be able to be incorporated into OSM Analytics? It already does feature counts between two periods. If this could be done by administration boundaries #1, it would be a great feature for analysing OSM data.

[tyrasd]

run the error tool in JOSM

this might be a bit hard to implement in practice since I wouldn't know a way to run JOSM's internal validator on global OSM data.

But one could probably even just use the output of other existing data validation tools, for example keepright, tofix, osmlint, etc.