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One, the Del Norte Titan, was found near the Oregon border in 1998 by Taylor and another big-tree specialist, Stephen Sillett, who teaches forest ecology at Humboldt State University.Part of a stand of massive coast redwoods, the Del Norte’s diameter measures about 24 feet, just less than the width of a tennis court.The forests make a tantalizing playground for adventurers armed with rangefinders and dreams of the next big find.“For big tree hunters, this is not a profession,” said Lea Sloan, a spokeswoman at American Forests, a group that tracks America’s tallest trees.“In some ways you could call it an obsession.”Among the elite are naturalists like Mike Taylor and Chris Atkins, who in 2006 discovered the current world height champion — a coast redwood called Hyperion that rises an incredible 379 feet, equivalent to about 35 stories.Results from Pix4Dmapper will be absolute and comparable under different light conditions: sunny or overcast.Note: as shown in the illustration below, flying under scattered clouds might lead to reflectance inaccuracies, clouds may block sunlight heterogeneously across the field while the irradiance sensor can only capture one illumination condition per image.Full dataset available to download on our support page here.The goal of this project is to get an NDVI index map of a field using the Sequoia camera that captures Green, Red, Red edge and NIR wavelengths.
In the age of Google Maps, you might be tempted to think the world has no places left to discover. Even in 2017, there are areas of forest along the teeming north coast and beyond that few humans have penetrated.
This protocol enables access to many camera functions, including capture and trigger for automatic control with a flight planning software. Pix4Dcapture will support Sequoia’s automatic triggering and is finalizing mobile app integration.
There are three image capture modes: Parrot has launched a crowdsourced project on Drone Code for the integration of Sequoia with Pix Hawk. Yes, the irradiance sensor is designed to provide the information needed to correct for illumination differences.
Here an example of a 3D printable integration kit from one of our partners.
Sequoia hosts a Wi-Fi interface that can be connected to using any Wi-Fi capable device.