Agricultural doesn't require the same resolution fly a fair bit higher I imagine - but it does require different spectrums. Then again, the multispectral cameras might not have the same mpix counts.
I imagine Nearmap already have their hands full and the planes are probably pretty busy - but a multispectral capture might have a business case.
Large chunk of ground to cover mind you. But if you were to value add with simultaneous LIDAR or other sensors, it might make sense.
NEA Price at posting:
$2.25 Sentiment: Buy Disclosure: Held