Hello friends,
i have two DTMs and two DSMs created from LAS files......
first LAS files were created in autumn
second LAS were created in spring
when i compare elevations between DTM autumn and DTM spring.......differences are minimal, but to and fro are big differences, like -50 metres
same at DSMs..
what could have caused it? may it be caused by noise by scanning or even something else?
thank you so much