**Summary of Issue:**Dear friends,
After reading several topics from our forum and making several attempts to generate a uniform dense cloud, I have come to ask for your help help me with large holes in the tie points and dense cloud (PHOTOS). This is an aerial survey work for mining
Flight parameters:
Software used: Drone Deploy
Sidelap: 60%
Frontlap: 80%
Height: 150m
Processing Parameters (Photoscan):
Mascara: Method - From Alpha / Operation: Replacement
Align Photos: Acurracy - High
Reference Preselection (Already tested without preselection)
Key Point Limit: Tested from 40,000 to 80,000
Tie Point Limit: Tested from 0 to 20,000
Constrain features by mask checked
Adaptive camera model fitting checked
Date Issue Began: 15/01/18
Drone Model: Phantom 4
Mobile Device Model and OS version: Ipad mini 4 - iOS 11
DroneDeploy App Version: Last version update