Orthomosaics are one of the most important imagery outputs from processing drone data. They provide a significant representation of the data collected from the flights. Site Scan allows you to process orthomosaics from multiple flights simultaneously in the cloud. However, because the space is so large, you may have multiple separate orthomosaics that need to fit together like puzzle pieces to give you a complete picture of your project, terrain, or assets. ArcGIS Pro allows you to create a compact orthomosaic from imagery data collected from different drone flights. In this blog post, we will look at how you can use ArcGIS Pro to create a combined orthomosaic from data collected from multiple drone flights. You can apply this process to other types of images as well.
In our example we will study 4 orthomosaics taken from
4 flights along the coastline. The first step in combining orthomosaics is to create a mosaic dataset. Mosaic datasets are used to manage, display, analyze, present, and share imagery and raster data. When you create a new mosaic dataset, an empty space (container) is created in the any expertise and advice geodatabase with some default properties to which you can add raster data.
You can access detailed information about the mosaic dataset here . You can also watch the details of the “ Mosaic to New Raster ” tool, which allows creating a mosaic from a group of separate images in ArcGIS Pro, here .
Steps to follow:
Orthomosaics are first added to ArcGIS Pro by creating a folder link
Right-click on the Folders section in the hale and dorr formula Catalog pane and select “ Add Folder Connection .” Then, navigate to the folder where the orthomosaics text services are stored locally and select the folder.
Orthomosaics are selected from the folder and dragged and dropped onto the map. ArcGIS Pro may ask you to create pyramids. If you want to optimize the performance of the image, select the “Yes” option.
Orthomosaics to be combined
Before starting the process, it can be verified that each orthomosaic is consistent and standard. This can be done by examining the raster properties and checking that the Number of Bands and Pixel Depth are the same for each task.
To do this, right-click on the raster in Contents and select Properties > Source . In the example shown, the image has 4 bands and the pixel depth is 8 bits unsigned. These values will be used as input when creating the mosaic data set.
