Surely this researcher knows the difference between accuracy, precision, and resolution. Millimeter resolution on GPS readings does not imply that precision or accuracy.
Using enhanced GPS techniques may be able to get a differential accuracy of a few inches. But these measurements have not been available for reference until recently so the older measurements are less accurate.
I thought about that very point.
The area has been said to be ‘subsiding’ forever. There’s even a Harris County Subsidence District which taxes your water wells, supposedly to help stop subsidence.
Of course, the horrible pronouncements that have been made over the last 30+ years keep not coming true. If they had, the whole of Houston would be 10 feet under water...
There is a new group in Houston that is trying to get a “fee” passed by voters to help with flooding, as if we aren’t already taxed for that anyway. This is likely just a scare pronouncement geared to help with the new tax campaign.