1 – Aims

To know the digitization by means of photogrammetric capture.

To know the necessary procedures to carry them out and to be able to apply them.

To know the limitations of this methodology in its aerial form.

Show the adaptability of the technician and the use of different capture tools.

To show the collaboration of different photographic data, both terrestrial and aerial, and their harmonic union.

Showcase modern processing software that is affordable and open to free processing of information and content.

Final obtaining of the photogrammetric result, with a point cloud and a polygonal mesh.

2 – Learning Methodology

Students will read this tutorial and watch the video.

The content of this theoretical-practical video, is focused on the student can know several conventional terrestrial photogrammetric technologies in addition to their methodologies of action; showing the handling of attitudes and digital tools that the photogrammetrist technician must learn.

In order to favour the understanding, different aspects of the tools used that may be of importance for their handling are explained, while the explanation is developed by means of 3 practical examples that recreate different situations both in field work with tasks and procedures that the technician must carry out, and in office work with its corresponding data processing and obtaining three-dimensional elements.

In order for the teacher to evaluate the use of the practice, each student will write a report and will hand in his photogrammetric model, as well as the photographic and georeferenced information if there is any.

3 – Tutorial duration

The practice described in this tutorial of high practical content will be carried out by capturing elements near or belonging to the training center, a heritage element, or a work in phase of structure, are sets of interest to perform this exercise. The duration of the tutorial is variable, and can range from 4 hours of practical application of field and office work to more than 12 hours depending on the element captured and the computer components with which the data is processed.

4 – Necessary teaching resources

Drone equipped with camera if possible compatible with Pix4Dcapture, you can check it in the following link: https://www.pix4d.com/es/producto/pix4dcapture

SLR camera.

Computers compatible with RealityCapture requirements.

64bit machine with at least 8GB of RAM.

64bit Microsoft Windows version 7 / 8 / 8.1 / 10 or Windows Server version 2008+.

NVIDIA graphics card with CUDA 3.0+ capabilities and 1GB VRAM.

CUDA Toolkit 10.2, minimal driver version 441.22

5 – Contents

5.1- Hermitage Case Study

5.2- Video

6 – Deliverables

In order for the teacher to be able to evaluate the students’ use of the internship, the students will write a report of 3 pages maximum.

In this report, the student will explain the steps followed in the practice, the difficulties encountered and the decisions taken. The report will be illustrated with photographs of the data capture process and its processing, while the 3D file must be delivered in the same way and uploaded to the Sketchfab platform.

7 – What we have learned?

The realization of photogrammetric work by drone, in its flight stages and different missions in addition to smartphone applications for handling and subsequent office work of data processing.

The importance of fixing height, speed, camera angle and overlap to the characteristics of the element to be photographed.

The interpolation of aerial and terrestrial photogrammetry in the data capture of the same project.

The collection of geo-referenced data using drone photography.

The processing of images obtained by 2 different mechanisms such as a reflex camera and a drone, the combination of these data in the same geometric model georeferenced.

8 – Files to use in the tutorial

Images in JPG format

Project in RC (Reality Capture)

Geometric model in OBJ format