Background: I’m a civil engineer with a firm that has a relatively large and accomplished survey department. Our survey group is interested in evaluating the use of UAV’s to assist with certain aspects of their survey field work. We have done a small-scale experiment on a ¼ acre mountain site using my H to develop topography and boundary information which was then compared to GPS based ground shots and the comparative results were impressive. I now have an opportunity to do a much larger scale experiment on a full section of vacant farmland (640 acres, one square mile) and need to get well organized to have a chance at success in promoting the use of UAV technology to the firm. Questions: I have the 640-acre section laid out on Google Earth which provides a KMZ file format. What apps accept that format? I have UAV toolbox but don’t see the ability to import an external file of that type to create my mission. Admittedly, I am rookie with UAV toolbox and the mission function. I plan to shoot in 4k and curious to better understand the sweet spot for altitude (400' AGL and below) vs speed. Any experienced advice in this regard is appreciated. A mission of this magnitude will require several battery changes. I’ll have to abort the mission at some point along the route to return to base for more juice. In addition, my base location will be changing to maintain VLOS. Can a way point mission be restarted at a select point along the route or do I have to create a new mission? Thanks to all in advance. This forum and its members have been a wealth of knowledge through my UAV educational journey and I’m very appreciative.