César Hoyos. Español

César Hoyos

Geomatics engineer.

I measure buildings, land and coastlines, and build small tools to make that work simpler and safer.

After over a decade measuring buildings, land and coastlines, I'm still learning something on every job. This is where I share what I know, the tools I build and what I'm learning along the way.

Now

Updated:

What I do

Most of my work is turning places into measurements that other people can trust and build on.

Reality capture with laser scanners

I capture buildings and sites with static and SLAM laser scanners, mostly Leica kit. The result is a registered, georeferenced point cloud that the whole team can measure from.

From point clouds to drawings

I turn point clouds into floor plans, elevations and sections in AutoCAD, and check the drawings back against the cloud.

Drone photogrammetry and LiDAR

I plan and fly survey missions and process them into orthomosaics, terrain models and 3D models. I have also captured thermal imagery for others to interpret. UK CAA drone certificates; Spanish AESA in progress.

Land survey and setting out

Total station and GNSS for topographic surveys, setting out plots and boreholes, and monitoring movement in historic buildings.

CAD and GIS

AutoCAD and Civil 3D for drawings, surfaces and profiles. QGIS for land and boundary plans; I used ArcGIS in earlier jobs.

Automation and small tools

Codelists, templates and procedures that keep field and office data consistent. I'm now learning Python to automate the repetitive parts.

Drawing: on the left, a scattered point cloud of a room; an arrow leads to a clean floor plan of the same room, with a door and a dimension line.8.40
From point cloud to plan: most of the work is deciding what to draw and checking it against the cloud.

Some examples

A few examples among many, to show what this kind of work looks like.

Watching a coastline move

The cliffs of north Norfolk lose ground every year, and the district council needs repeatable measurements to plan for it. With a drone we captured 1,500 m of cliff in 36 minutes of flight, instead of most of a day on foot, and nobody had to work near the edge. The project was commended at the RTPI Awards for Planning Excellence 2019.

Drawing seen from above: a cliff edge between land and sea, with a drone flying a back-and-forth grid of parallel lines over it and the overlapping photo footprints.

Bringing drones into a consultancy

I wrote the business case for the drone, the software and the training, then introduced drone surveying in the group and ran it day to day until I left: planning, risk assessments, flying, processing and delivery. I learned as much about procedures as about flying.

Whole buildings, scanned

Schools and other public buildings scanned from end to end with static and SLAM scanners, then drawn as floor plans, elevations and sections. SLAM is quick along corridors; static stations give the precision on facades. Combining both is often the answer.

Drawing: a laser scanner on a tripod sends thin rays towards a building facade, which appears as a pattern of points with windows and a door.

Over eight years on landfill sites

For more than eight years I surveyed Norfolk County Council's landfill sites: tracking boreholes and pipework, and calculating volumes between campaigns. Repeat work like this teaches you to keep control points, codes and methods consistent.

Where I've worked

Most of my field work has been in the East of England, but jobs took me across the country. Before that I worked around Andalusia and Gibraltar.

Simplified map of England and Wales with numbered points: Norfolk and the East of England (including Peterborough), London, Berkshire and Oxford, Leeds, Hull, Derby, Devon and Exeter, and Bournemouth.12345678
England and Wales
Simplified map of Andalusia with numbered points: building and civil works across the region, a bridge in Benamejí (Córdoba), and Gibraltar.91011
Andalusia and Gibraltar
  1. Norfolk and the East of England, including Peterborough
  2. London
  3. Berkshire and Oxford
  4. Leeds
  5. Hull
  6. Derby
  7. Devon and Exeter
  8. Bournemouth
  9. Andalusia: building and civil works across the region
  10. Benamejí (Córdoba): a bridge under construction
  11. Gibraltar

Sketch map, not to scale.

Kinds of sites

Lab

Free tools I'm building. They are in testing, so please check the results before using them in professional work.

On the wayFree

Distances and elevation changes from CSV

Upload a CSV of coordinates and get cumulative distances, total climb and descent, and a short summary of the route.

Notes

Short, plain explanations for students and colleagues.

Writing and recognition

Path

Over a decade working in the UK, and before that in Spain. In short:

  1. 2007–2009

    Higher technician in surveying

    A two-year course in surveying operations and urban planning projects in Cádiz, where I learned the basics of measuring.

  2. 2009–2010

    Métodos Topográficos del Sur

    A small surveying equipment distributor in Marbella. I worked as a site surveyor on building and civil works across Andalusia and Gibraltar, including a bridge in Benamejí (Córdoba), and ran demonstrations and supported customers with their instruments.

  3. 2010–2015

    Degree at the University of Extremadura

    Bachelor's in Geomatics and Surveying Engineering. My final project mapped wind energy potential from satellite data.

  4. 2015–2016

    Sun Hill Surveying & Engineering, London

    Night-time highway surveys and daytime urban GIS surveys across London, with my own total station and GNSS kit, including road signage data for Transport for London.

  5. 2016–2026

    NPS Property Consultants, Norse Group

    From Assistant Land Surveyor to Senior Land Surveyor in Norwich. I introduced drones to the group, scanned whole buildings and surveyed for councils and public bodies. Since 2025 I have also been an APC counsellor for RICS, helping candidates through their professional assessment.

  6. 2026

    Back in Madrid

    Studying a Master's in Artificial Intelligence and learning to build the tools I used to wish I had.

Memberships

Get in touch

Working on something involving reality capture, geospatial data or survey workflows? I'd be glad to hear about it.

A contact form is coming soon. For now, LinkedIn is the easiest way to reach me.

CV available on request.