Geoinfotech Resources Limited was awarded a Drone Mapping/Survey of a railway 24km line with a 20m setback located in the central city of Lome, Togo. The project was carried out between the 30th of November, 2022 with mobilization and was concluded on the 4th of December, 2022. Image processing and analysis commenced immediately and the submission of all deliverables and the technical reports were made on the 23rd of December 2022. This report describes in detail the works carried out.

1.1.   Guide Map

The flight plan was prepared using the listed groupings. During fieldwork, flight plans were made in phases for accuracy purposes and connectivity of the Drone with RTK Base Station. We have grouped each route into linear batches (A, B-C, D, E-F, G) and (P, Q, R, S, T and U) for proper visualization of every phase in the map.

1.2.   Project Specifications
The scope of work for this project is as follows:
•Reconnaissance Survey for Ground Control Points
•Planning, Testing and Calibration of Drone Instrument
•Flight Planning for Linear (Route) Survey
•Drone Mapping for Data Capture
•Drone Data Processing with PIX4D Software for Orthophotos
•Production of 3D Map & Digital Elevation Models
•Deliverables (Softcopy of Orthophoto, Geotiff and PDF, Photos and Videos of the study site)
•Report to be presented using Ms. Office Suite

2.0Project Personnel and Equipment

2.1Personnel:

The following personnel made up the project team that carried out the project

4.0   Deliverables
The deliverables for the project are in softcopy and stated in the table below:

4.1. Orthophoto

Orthophoto Map displays many small pieces of the aerial geotagged photograph, mosaic together and then geometrically corrected and mapped out to its proper scale (this shows the true image of the site route).

4.2. Orthophoto 3D Model

Orthophoto 3D Map displays 3 dimensions of many small pieces of the aerial geotagged photograph, mosaic together and then geometrically corrected to give a realistic representation of the area. In this study, the orthophoto presents the real world in a
photographic image, it re-combined the small pieces of all the aerial imagery acquired during field data acquisition duly adjusted (georectified) to its actual ground position.

4.3. Digital Surface Model

Digital elevation models (DEMs) contain the elevation of a point on a surface above the mean sea level. DEMs are sometimes referred to as the digital terrain model (DTM), or Digital Surface Models (DSM). A Digital Surface Model of section (A) represents the
elevation of features on the surface, modeled to visualize and understand the terrain of the surface and other features within the area.

4.4. Contour Map

A contour map of section (A) from the guide map, showing the topography of the area with a contour level of 5-meters interval. The contour map shows the changes in elevation of the study area it allows one to look at a two-dimensional map and visualize
the study area in 3-dimensions.

5.0   Conclusions
The Drone Mapping was completed and on careful analysis of the data acquired, the results of the data processing and the maps produced, we safely came to the following conclusions:

The maps produced as a result of the drone mapping are a true and realistic representation of the subject site at the time the survey was carried out.

The mapping was carried out in full accordance with existing specifications, survey laws and regulations and in compliance with our company’s Quality Control.

PHOTO PLATE

Drone Mapping of Parts of Lome Rail Line for Graceland Energy Located at Lome Togo

Drone Mapping of Parts for Graceland Energy