Create an orthomosaic in Agisoft

Orthomosiac Guide

Written by Ben Weinstein, September 13, 2022

The goal of this wiki is to document the steps to create a Orthomosaic from a set of UAV raw images. This relates to the everglades project with both Inspire Quadcopter and Wingtra Drones, but can serve as a general guide for the steps to create a georeferenced image.


This tutorial uses Agisoft Metashape Pro. Future work needs to determine whether the standard version will suffice. We are following the manual here: This tutorial is quick and dirty in the sense that we are choosing low quality outputs to speed up the workflow.

Load Images

Raw images look like: Screen Shot 2022-09-13 at 11 19 35 AM

Workflow -> Add Folder Screen Shot 2022-09-13 at 11 21 12 AM

Align Photos

Align photos places the images from a single physical camera into a common reference system. It creates a sparse point cloud of overlap to generally tell where the images are in space.

Screen Shot 2022-09-13 at 11 27 44 AM

To view the coordinate system and alignment, view the ‘reference’ tab in the bottom left. Screen Shot 2022-09-13 at 11 29 45 AM

Set Coordinate Reference System

We are confident that the Inspire knows its geospatial accuracy to about 10m, and the pitch degree to about 1m. Screen Shot 2022-09-13 at 11 38 42 AM

Set Marker Points

If we don’t have ground control points we can skip this step.

Build Dense Cloud

Workflow -> Build Dense Cloud

The dense point cloud is required to build an elevation model to convert the 2D images into a 3d surface.

Build Digital Elevation Model

The elevation model projects the images into 3D space and is saved as a seperate .tif file.

Workflow -> Build DEM

Build Orthomosaic

Use the digital elevation model and the dense point cloud to create a single stitched model of the entire colony.