Presenters-0026

From CSDMS
CSDMS 2018 annual meeting - Geoprocesses, geohazards


How to make accurate digital elevation models using imagery from drones - or even walking around

Chris Sherwood
USGS, United States
csherwood@usgs.gov

Abstract
Modern photogrammetry allows us to make very accurate three-dimensional models using images from consumer-grade cameras. Multiview stereo photogrammetry, also known as structure from motion (SfM) is now easily accessible. Coupled with drones, this is transformative technology that lets us all make better maps than the National Geodetic Survey could not long ago. This hands-on course will demonstrate the basic tools and provide some tips that will allow you to map your favorite field area with 3 - 5 cm horizontal resolution and vertical RMS errors of less than 10 cm. Even better resolution can be obtained for smaller areas, such as outcrops, archaeological digs, or your daughter's art project.
We will use Agisoft Photoscan Pro software...please download the free demo (Pro) version before the class. It works equally well on Mac, Windows, and Linux. If you have a choice, chose a machine with an NVidia graphics card. We encourage you to collect a set of images to bring to the class. Guidelines on how best to take images intended for SfM will be send around before the meeting.



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Of interest for:
  • Terrestrial Working Group
  • Coastal Working Group
  • Hydrology Focus Research Group