M30T & M3E Questions

[FrostBite]

 I'm interested in purchasing the DJI M30T or DJI M3E for mapping with RGB and Thermal.

I'm curious to know everyone's input! I've been using an older drone, and am looking to upgrade.

1) Does the DJI Pilot 2 app allow for mapping large areas with large variations in terrain? I ask only because the Drone Deploy app only allows the use of terrain awareness with areas under 200 acres.
2) How much actual flight time do you get, on average, with one battery, with either drone?
3) Is the M30T a good drone for creating orthomosaics and 3D models of large areas?? I've been reading that it isn't suited for those kind of missions
4) I'm reliant on using terrain awareness for mapping areas with large variances in terrain (mountainous). How hard is it to import the DSM from 3rd party websites into the DJI PIlot 2 app?
5) Does the speed of the mapping mission get reduced or increased based on shutter speed/low light?
6) Would the RTK system on the DJI M3E work when I'm outside of cell service? Do I need a base station for it? Or does it give better location information on its own?

Thanks for any and all input!

[gto234]

I can speak for M3E which I have.
It is almost perfect for mapping. I say almost because I would like it to have a little bit better camera.
It fly's for about 45min on one battery but in real conditions I'd say for 30-35min.
It has real-time terrain follow and it works above 30m AGL. It can also import custom DEM easily.
The RTK can work with their base station or via NTRIP. If you have emlid M2 or the RS2/3 you can output the corrections locally with gps's hotspot or other local network so no internet is needed.
Pilot 2 is very good planning app but it has some bugs that DJI fixes very slowly.
Overall I am happy with the M3E.