Photogrammetric Survey and GNSS Georeferencing at the Corallium Beach Hotel

At Digital Fibers Planners S.L., we are committed to technological innovation to offer precise solutions for topographic surveys and technical architecture.

One of our most notable recent projects has been the photogrammetric survey of the Corallium Beach Hotel by Lopesan, located in San Bartolomé de Tirajana, Gran Canaria.

This work combined the use of drones with high-resolution RGB cameras and GNSS technology with RTK, achieving precise georeferencing and reliable results with a maximum uncertainty of only 3 cm in façade measurements.

Project Location

The Corallium Beach Hotel is located at 25 Los Jazmines Street, within an urban and tourist area of the municipality of San Bartolomé de Tirajana. Its surroundings, comprised of residential and hotel buildings, required meticulous planning to ensure the construction would not interfere with the hotel's activities or the urban environment.

Equipment used

To ensure precision in the process, the following devices were used:

• Dron DJI Air 3S

  RGB camera with a 1-inch 50MP CMOS sensor. Equipped with 360° anti-collision sensors for greater operational safety.

• GPS Topcon HiPer SR

  GNSS receiver with RTK technology for real-time positioning, used to establish ground control points.

Photogrammetric Survey Working Methodology

1. Establishing GNSS points

   Ground control points were strategically distributed using GPS in RTK mode, connected to the permanent Maspalomas antenna.

2. Planned photogrammetric flight

   Aerial images were captured with sufficient longitudinal and lateral overlap to ensure dense and complete coverage of the property.

3. Processing and orthorectification

   The images were processed with specialized software to generate a dense, georeferenced point cloud. The analysis was divided by facade to optimize resources.

4. Corrections and digitization

   Minor adjustments (less than 3 cm) were made in AutoCAD to ensure consistency of the model with the physical reality of the building.

   
   
   
   

Results

The resulting model allowed for a highly accurate calculation of the total area of the façades, which amounts to 5,884.53 m². The uncertainty in the GNSS readings was estimated at 8.42 mm, which allowed the overall model error margin to be maintained within 3 cm, even after correcting for possible architectural deformations.

Viewing the Elevations

The final elevations of the hotel and its annexed elements were generated in AutoCAD and organized by orientation and structure: main facades, supermarket, interior patios and entrances.

These plans provide a reliable basis for future structural interventions, renovations, or architectural inspections.

Conclusion

Thanks to the combination of high-precision GNSS technology and aerial photogrammetry, Digital Fibers Planners S.L. was able to document all the façades of the Corallium Beach Hotel in detail and with rigor, providing a reliable basis for future architectural and technical interventions.

This project is a clear example of how civil engineering, geomatics, and drone technology can be integrated to offer modern, fast, and highly accurate solutions.

At Digital Fibers Planners S.L., we are ready to assist you with civil engineering, urban planning, or technical architecture projects, supported by advanced technology.