alt Hacker NewsCurrent or most recent data is very expensive, indeed, but researchers as well as governments should have access to data that allows them to measure the rates of change across time and extrapolate them, no?
Current or most recent data is very expensive, indeed, but researchers as well as governments should have access to data that allows them to measure the rates of change across time and extrapolate them, no?
Not really in developing countries which the OP is talking about.
While most developed countries have aerial imaging campaigns on some recurrent schedule (NAIP in the US is on a rolling 3-year cycle), this is usually not the case in developing countries.
Quite a few never had any large scale aerial imaging campaigns and most do not have them on regular schedules.