Introduction
Nowadays, amateur Unmanned Aerial Vehicles (UAV, drones) have an amazing range of applications. You may wonder: “Can I use my drone for photogrammetry?” and the answer is “Yes”. In this tutorial, you will create a georeferenced and measurable 3D model, using YouTube video captured by DJI Inspire 1.
First, a few words about the software required to complete the tutorial:
Sputnik GIS allows to measure distances and heights, calculate cut and fill volumes of piles and quarries and volume differences between digital elevation models obtained at different time, generate cross-sections (profiles) of DEMs and export them to DXF. Sputnik GIS is also used for virtual reconstruction of heritage objects. With its’ ability to simultaneously display different types of data: 3D models, spherical panoramas, video and audio files, raster and vector maps, terrain data, texts and images, Sputnik GIS allows to keep various information on heritage objects and places and display it in highly effective form.
Sputnik Web is an advanced online viewer of georeferenced 3D models, created with Agisoft PhotoScan.
Agisoft PhotoScan is a stand-alone software product that performs photogrammetric processing of digital images and generates 3D spatial data to be used in GIS applications, cultural heritage documentation, and visual effects production as well as for indirect measurements of objects of various scales.
The model cannot be used for any kind of important measurements, because the distance measurement errors might reach 1 m or more, due to objective limitations of the method. In case you need a model with an accuracy about 5 cm, consider using GeoScan 401 drone.
Source video (4k / 2160p):