UAV construction for agronomy

Hi All, we are planning to manufacture uav flying wings for agronomy uses in our country.
We will equip the kits with multispectral cameras for ndvi mapping.
We have selected some airframes for the plane, and we want to use the px4 for the autopilot.
Please, can you recommend us about the set of components will be needed to this type of application?
Gps, airspeed sensor, laser rangefinder, etc.
All information you can send us will be very appreciated.
Thank you for all
best regards