How do I combine multiple flights?

Learn how combine multiple data collections into a single map.

If you are flying several hundred acres and require battery changes to cover the field, rather than turning off the SlantRange system and having to combine multiple Datasets manually, leave the SlantRange system on throughout the return to base, battery change, and return to the field. SlantView is able to recognize the pit stop, and data quality will not be affected. This is possible if you are using a dual battery setup on your aircraft, or have a separate battery powering your sensor. If the sensor is being powered by onboard aircraft batteries rather than its own external battery (and the aircraft is using at least 2 onboard batteries), replace the aircraft batteries one at a time. As long as one battery is connected, the sensor will stay powered on. If a single onboard battery is powering your sensor and your aircraft, you will have to turn off the sensor, remove the battery, connect the new battery, boot the sensor, and then continue the mission, producing two separate Datasets.

Keep data volume and SlantView processing in mind when covering large acreage and combining datasets. A 30 minute flight is approximately 8GB of data. To process efficiently in SlantView, you will need as much available RAM as the size of the raw dataset (please see this page of the User Guide for considerations of what computer to use to run SlantView).

To combine two Datasets, copy the images into one folder and combine the gpsIndex.log files. The images will sort themselves into chronological order automatically based on their given timestamps. The gspIndex.log files must be combined in chronological order manually; just copy and paste the text from a gpsIndex file into the bottom of the gpsIndex file from the prior flight using a text editor such as Notepad on Windows. Remember, for SlantView to open a Dataset, the folder must be named with the 15 character date/time identifier. For a combination Dataset, that does not have a unique name assigned by the sensor, just copy the folder name of one of the component Datasets and change the last digit. The grey.tif and sensor settings.json files from multiple Datasets will overwrite each other when copied into the same folder, just make sure at least one copy of each of these files (from any of the component Datasets) is included.