Long time drone deploy user i have completed lots of regular mapping mission But this will be the first time i have to map a corridor.
The project in question is a 40km section of roadway with approximately 50 m on each side of the highway from center line that will need to be mapped. so 100m total width ±
all we need from this map is the edge of the trees on the existing clearing so we can survey a r/w for this roadway to lie in but the government wants to utilize the existing cleared space and not just go 50m from the centerline of the road. I figure it will be easier for us to map this and calculate the right of way using the orthophoto rather than send one of my survey crews out to survey in the edge of bush and c/l of roadway on both sides for 40km.
It will obviously need to be tie to ground control so we can insert it into our CAD drawing to find suitable locations for the boundary posts. realistically i only need this to be accurate to within 50cm or less. and i dont need super high resolution only to make sure we arent putting the right of way through the trees is all so i am planning on flying at 400ft
i am looking at the linear mapping APP and it looks perfect i only have a few questions.
i have it planned for 3 runs, edge,CL road, Edge is that overkill? could i get away with 2? i am planning a trial run on a short 1km section before proceeding.
Ground control - i was planning for 1 every KM painted on the roadway. would this suffice? Im thinking i may need more if i end up doing this in smaller sections…which brings me to my next question
should i map this as one? right now its telling me 3500 images so its totally possible. But after doing some reading on here it seems people are breaking these corridors down into sections.
How does drone deploy handle the elevation change? i have a 400ft drop from one end of the project to the other, which is not much over 40km. will the linear mapping APP hold a GPS altitude or will it still just go above ground level from the home point? which also brings me to my next question
Home points - the fastest way to do this is to fly 40km one way, then back, then back etc however i would have to follow with the truck to manually land the drone once the batteries are low because the drone will want to return many KM back to home. Not really a fan of this method so im thinking this is why people are splitting these into smaller sections.
Overall compiling…if i map this into say 3km segments, wwould a person compile all the images together if you overlap flight plans? because there will be an elevation change at each flight plan. will those compile ok?
Thanks for the help and any tips!