Not OP but good question. The diffs end up being semantic and not merely a difference of triples. This is due at least in part to the open world nature of RDF and concepts such as reasoning and materialization.
Opposite experience here. Services like Dark Sky and Wunderground are so inaccurate up here in Alaska that it's dangerous. NWS is also often pretty wrong but way less wrong than anything else. Interesting to hear your
This is immensely useful. Would love to see support for custom drop-zones with custom actions. For example, allow the user to change the width from 1/2 screen to 1/3 or 1/4. Or even 1/2 width and 1/2 height instead of 1/2 width and full height.