Is there any research or specific analytical methodology to assess the degree of comparability between two different data? For instances, my current research is trying to assess the correlation between road roughness (IRI) data and the photo from public that taken by crowdsourcing application to report road defects. I understand that these two data have different time resolution (IRI is taken biannually, while the report from public can be taken everyday), different spatial resolution, different measurement, etc.
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