Build me a Survey Flight plan application inside my platform

I have a project in mind and I need help :) I have a cloud-based web platform where people can outsource their drone data analysis「 SIMPLE-POINT」 Basically, I was thinking about adding an AERIAL Flight plan application inside SIMPLE-POINT. I made a presentation to explain it better about it but there is a short brief. An AERIAL Flight plan is an application that allows the drone operator to design their flight route during the survey. There is 2 type of flights, LASER and PHOTOGRAPHY. The operator draws inside the map to set the area where the drone will fly and output that information in a KML. file, the file is put in the drone by an SD card. After that, the drone does all the work automatically. This kind of application is really helpful but here in Japan, we have just one software to do it {TREND-ONE}. The problem is that TREND-ONE is very expensive and most of the operators can't afford it. It would have a good impact on the UAV market if We could add something like that in SIMPLE-POINT. There are many open-source applications so I don't think that would be necessary to create everything by 0. I would like to know what you think about it :) Here are some of the links inside the presentation. [login to view URL] [login to view URL] [login to view URL]