What is the Polygonal Method in Topography?

que es la topografia poligonal

Polygonal topography is a surveying method based on creating a model composed of interconnected points that form polygonal shapes. These vertices, which connect to each other, give rise to the term “polygonal,” derived from their geometric forms.

Topography has been used since ancient times to determine the characteristics of terrains. However, its use has been consolidated today thanks to various advancements in topographic measuring instruments, such as GPS technology, which provides great accuracy in representing properties.

Applications of the Polygonal Method

Discover the four main uses of this topographic method:

  • Topographic Surveys: The polygonal method helps us obtain precise data of the terrain, which are necessary for the planning and execution of construction projects.
  • Property Delimitation: Establishing boundaries is important for property cadastre, and the polygonal method helps us demarcate these boundaries, ensuring accurate maps and legal documents.
  • Construction Projects: During the construction process, the polygonal method can be used to verify that the work is being developed according to plans and specifications.
  • Geodesy: In map creation, polygonal topography is essential for good resource management and infrastructure development.

Benefits of the Polygonal Method

The polygonal method offers numerous benefits like:

  • High Precision
  • Versatility
  • Efficiency
  • Reliability

Now that you know a bit more about the polygonal technique, we invite you to contact us. We are Acero Estudio, a consulting firm specializing in topography services and drone topography. We offer a wide range of solutions for the construction, architecture, infrastructure, and mining industries.

Contact us and benefit from working with experience, professionalism, and the guarantee of precise work. Our 25 years of experience and projects in Europe and Latin America back us up.

Our Drone Services

servicios con drones

Drones have become essential tools in the construction and architecture sectors. Their ability to perform complex tasks while avoiding human risks, combined with the use of increasingly advanced cameras and sensors, makes this technology highly useful for data collection and project monitoring.

Acero Estudio, aware of the potential of this expanding technology, made an aggressive approach a decade ago and began training in the use of drones and sensors. This has enabled us to offer our clients maximum value from drone services in Europe and Latin America.

In this regard, we have successfully provided high-value-added services in key areas such as:

Topographic Surveys with Drones

This involves using the drone’s cameras and sensors to capture high-resolution aerial images of a specific terrain. These images are then processed to generate precise maps and 3D models. This method is faster, less expensive, and more accurate than traditional surveying methods.

Photogrammetry with Drones

This process involves photographing large areas of land to create detailed maps and 3D models of these zones. The images are overlapped and processed using specialized software to extract precise geospatial information. It is a very useful service for construction projects and urban planning.

LiDAR Services

This technology uses lasers to achieve a precise topographic model, even in areas with dense vegetation. The data obtained with LiDAR allows for the creation of detailed topographic maps, which are necessary for many types of projects, such as hydraulic engineering in forested areas.

Construction Monitoring with Drones

We monitor the progress of your projects objectively and in real-time. Drones can capture images and videos at regular intervals, providing project managers with a detailed view of progress. This helps identify potential problems and ensures that the project stays on schedule.

Now that you know more about our drone services, do not hesitate to contact us. We are Acero Estudio, a company specialized in services for the construction, engineering, architecture, infrastructure, and mining sectors in Spain and Peru.

How photogrammetry with drones enhances geological exploration in the mining sector

As you already know, Acero Estudio specializes in providing drone photogrammetry service. This technique that is normally used to measure, record and generate models of a surface becomes powerful when drones equipped with high-resolution cameras are used that can capture detailed images of inaccessible mining areas, providing a complete view of the terrain.

Exploration has taken a big step with the help of drones that allow us to reach areas previously inaccessible to ordinary geologists. Today, with powerful drones, equipped with long-lasting batteries and very high-resolution cameras, it is possible to achieve greater results in the mining prospection of a land.

Security Advantages

One of the limitations that geologists always had was access to inaccessible areas such as steep mountains or unstable terrain. Thanks to drones it is now possible to fly over dangerous and difficult-to-access terrain, obtain data from previously unreachable places.

Greater efficiency

Thanks to the ability to cover larger areas, aerial photogrammetry with drones is faster and less expensive compared to traditional aerial mapping methods. It is worth noting that there is software that allows evaluating the characteristics of the terrain to indicate the areas with the best perspectives.

Around the world, the mining industry is adopting drones for various applications such as:

  • Mapping of mineral deposits
  • Environmental monitoring
  • Mine Planning and Development

Contact us and we will help you integrate drone photogrammetry into your land analysis tasks, which will allow you to better understand your lands under exploration.

Aerial photogrammetry and its advantages to create cadastral information

plano catastral generado mediante fotogrametria con drones

The cadastral information of a territory contains a series of data about the properties, that is: physical characteristics such as areas and delimitations, legal information such as ownership of the land and even an economic valuation of the approximate value of the properties.

Thanks to photogrammetry it is now possible to create digitized models and records that provide exact information on the physical characteristics of properties and for this initial record to be used to add more data to said model.

Thanks to our drone fleet, aerial photogrammetry has experienced a considerable improvement in efficiency and what previously could only be done with a small plane or helicopter is now within our reach. Graphic information capture technology, video cameras and other devices are all technological elements that have been improving over time and that today allow us to generate reliable cadastral information.

The Importance of good urban management

As is known, cadastral information is basic for carrying out adequate territorial management and urban planning; In this sense, having this information and using it translates into:

  • Better urban administration.
  • Greater resources and information for future city planning.
  • Greater knowledge of the needs met and not met at the infrastructure level.
  • Projection of number of inhabitants and demographic characteristics.
  • Better management and allocation of public spaces for services: educational, health, etc.
  • Transportation improvement and planning.

It is clear that cadastral management is essential to create a sustainable city, with services equitably provided and functional in terms of transportation. Do not hesitate to request information about our drone photogrammetry service in order to improve the cadastral registry; we are at your service.

Contact Acero Estudio, specialists in photogrammetry with drones and consulting services for architecture and engineering in Spain and Peru.

Drones in Infrastructure: State of the Art and Future Perspectives

dron sobrevolando un puente y realizando vigilancia aérea

While it is true that we often see drones as fun tools, in the last decade their use has amplified our capabilities in various areas. As drone specialists, at Acero Estudio we want to show how this important tool plays a vital role in infrastructure inspection today.

Aerial Photogrammetry: Capturing precise details from above

One of the most significant drone-driven advancements in infrastructure inspection is drone photogrammetry. This technique uses high-resolution cameras mounted on drones to capture detailed images from different angles, allowing the creation of accurate three-dimensional models of existing structures and facilitating the planning of new construction.

Large construction companies use aerial photogrammetry to evaluate the condition of bridges, roads and buildings, identifying possible structural problems early. Additionally, the ability to generate detailed models facilitates informed decision making during the design phase and reduces costs associated with manual inspections.

Monitoring and Surveillance of Works: Guaranteeing Safety and Efficiency

Drones equipped with thermal cameras and advanced sensors can closely monitor construction progress, identify potential safety risks, and provide real-time data to management teams.

Developed countries, such as the United States and China, have integrated drone systems to monitor large-scale construction projects, such as highway expansion and the construction of new facilities. This constant surveillance not only improves workplace safety, but also contributes to overall project efficiency by identifying and addressing issues in a timely manner. In the past, if you wanted to observe a work from the air, it was necessary to hire the service of a helicopter or light plane, but today, thanks to drones, this possibility is within our reach.

Infrastructure and its Impact on the Lives of Populations

Infrastructure plays a fundamental role in the quality of life of populations. From roads and bridges that facilitate transportation to water and energy supply facilities that sustain communities, these structures directly impact the well-being of society.

Large construction companies are using drones to inspect and maintain their critical infrastructure. For example, regular drone inspection of bridges not only ensures their structural integrity, but minimizes closure times and reduces traffic disruptions.

Future Perspectives: Automation and Collaboration with AI

As technology advances, the future prospects for drone infrastructure inspection become even more exciting. The integration of artificial intelligence (AI) will allow drones to analyze data autonomously, identifying patterns and anomalies without human intervention.

Fully automating infrastructure inspection using drones will not only improve efficiency, but also reduce the costs and risks associated with manual work in potentially hazardous environments. This points the way toward a more proactive and predictive approach to critical infrastructure maintenance.

As we move into the future, the collaboration between drone technology and artificial intelligence promises an exciting horizon for global infrastructure development and maintenance.

Practical uses of photogrammetry in sustainable ecosystem management

la Fotogrametría en la Gestión Sostenible de Ecosistemas Amenazados

such as reserve parks, forests and jungles. In a world where illegal logging, deforestation and urban sprawl prey on and threaten the integrity of our natural environments, photogrammetry emerges as an essential tooPhotogrammetry with drones, a technique that combines measurement, topography and image capture, has become a fundamental ally in the conservation of threatened ecosystemsl to monitor, conserve and restore the health of our ecosystems.

Let’s learn about the practical uses of photogrammetry in the sustainability of vulnerable natural environments.

1. Monitoring Changes in Forest Cover

Aerial photogrammetry offers detailed monitoring of forest cover, identifying significant changes in vegetation. For this, it is important that diverse captures are made over time, which will provide us with information to combat illegal logging and deforestation, since it provides precise data on forest loss and early detection of illegal activities.

2. Biodiversity Assessment

3D models from images generated by photogrammetry software facilitate the assessment of biodiversity. This allows scientists and conservationists to understand the composition and structure of ecosystems, identifying key species and areas of biological importance.

3. Ecological Restoration Planning

Ecosystems can not only be conserved but regenerated and for this it is important to know their composition, identifying degraded areas and establishing effective strategies for the restoration of natural habitats.

4. Monitoring Erosion and Landscape Changes

Images captured using photogrammetric techniques are useful for monitoring soil erosion and landscape changes. This is essential to prevent soil degradation and adopt land use practices that maintain healthy ecosystems.

5. Rapid Response to Natural Disasters

In situations of natural disasters, carrying out photogrammetry work helps us to know the magnitude of the damage, recognize the most affected areas and establish with exact and first-hand information necessary activities for rescue or damage minimization.

6. Education and Environmental Awareness

Maps and still image captures are still used in schools and universities. Photogrammetry could go further because using 3D models it provides us with images, videos and simulated tours with real data that will allow students to increase their awareness and knowledge through modern and interactive information.

7. Applications in the Management of Natural Reserves

Natural reserves can also benefit from the modernity provided by this important technique, as has been evidenced in Chile where the Isluga Volcano National Park, Nevado Tres Cruces National Park, in the Antofagasta Region has benefited from photogrammetric studies that provide rangers with information important about the presence of activities that generate risks to the flora and fauna of the protected area.

For these reasons, do not hesitate to contact Acero Estudio, a company specialized in aerial photogrammetry with drones; we are at your service.

What software is used in drone photogrammetry?

ingeniero realizando fotogrametria aerea con drones

Drone photogrammetry is a technique that has gained a lot of popularity in various industries to perform precise mapping and measurements from the air. The process involves capturing aerial images and then processing them to create 3D models, maps and other representations. Here is a list of some of the most used software in drone photogrammetry:

Pix4Dmapper: It is one of the most popular software for processing aerial images captured by drones. It offers powerful algorithms to transform images into digital models and accurate maps.

Agisoft Metashape: It is known for its ability to efficiently process digital images and generate 3D spatial data, including terrain elevation models and orthomosaics.

DroneDeploy: Offers a cloud-based solution that allows users to not only capture images but also process them online to create 3D maps and models. It is designed to be easy to use and accessible to those who are not experts in photogrammetry.

Autodesk ReCap: This software uses photogrammetry to convert photographs and laser scans into detailed 3D models. It integrates well with other Autodesk products, making it popular in construction and engineering.

Bentley ContextCapture: Allows users to create high-fidelity 3D models from ordinary images, which can be especially useful for urban mapping and infrastructure projects.

3DF Zephyr: It is a software that reconstructs 3D models from photos automatically and is aimed at both beginners and advanced users due to its ease of use and comprehensive feature set.

OpenDroneMap (ODM): It is an open source solution for processing drone data. Provides tools to process aerial images and generate maps, 3D models and more.

Global Mapper: Although not exclusively for photogrammetry, it offers a wide range of spatial data processing tools, including drone photogrammetry.

Skyline Photomesh: Another robust software that transforms photos into 3D meshes, surfaces, and complete city models.

SimActive Correlator3D: Specifically designed for processing aerial images captured by drones, this software is used in cartography, construction and mining.

When selecting the right software for drone photogrammetry, factors such as ease of use, project specifics, compatibility with other analysis and design software, and the level of technical support available should be considered. Additionally, accuracy, processing power, and customization options are also crucial aspects to consider.

Aerial Photogrammetry: Capturing the World from Above

capturing world from above with drones

In this article, we will learn how the process of photogrammetry with drones, also known as aerial photogrammetry, works, a very important activity to generate models of large areas using drones with photography and georeferencing tools.


Before starting the photo taking process, it is a priority to clearly define the objectives of the project. This involves determining what information needs to be obtained, such as creating a topographic map, monitoring the growth of an urban area, or surveying urban growth for planning purposes.

In this phase, the appropriate equipment and platforms for the project and the types of drones, cameras, necessary flight altitude, sensors that will be used to capture the images, etc. are selected.


The flight route is planned that allows the necessary images to be captured. This involves determining flight altitude, speed, image overlay and number of passes over the area of interest.

Safety priority in aerial photogrammetry. Flight restrictions, airspace, weather, and other factors that may affect mission safety must be considered.


During the flight, several series of high-resolution aerial images of the area of interest are taken. These images are taken from different angles and positions to ensure complete coverage.

Georeferences are generated for each image, which is the addition of precise geographic coordinates. This is achieved using global positioning systems (GPS) on board the aircraft and reference markers on the ground.


This process serves to correct distortions due to the tilt and curvature of the Earth. Allows images to be overlaid correctly and used for accurate measurements.

Images are paired to create coherent 3D models and mosaics. Common reference points are used on the overlay images to align them correctly.

Digital models of the terrain will then be generated from the captured images. These models represent the elevation and topography of the Earth’s surface.


This phase can include the creation of topographic maps, the identification of changes in vegetation, the analysis of floods, among others.

The results of aerial photogrammetry are applied depending on the objectives of the project. For example, topographic maps are used in urban planning and civil engineering, while detecting changes in vegetation is essential in precision agriculture.


Aerial photogrammetry results are presented in a clear and accessible manner for interested parties. This can include maps, reports and 3D visualizations that help you understand and make decisions based on the data captured.

From urban planning to natural resource management, aerial photogrammetry continues to play an essential role in capturing and analyzing geospatial information. Contact Acero Estudio specialists in drone fleet services.

Benefits of Aerial Photogrammetry in Infrastructure Construction

drone aerial photogrametry

Aerial photogrammetry also known as drone photogrammetry. This technique, which uses aerial and ground images to obtain precise measurements and three-dimensional models, offers a number of key benefits for the planning and execution of public infrastructure projects.

grafico obtenido con la tecnica de fotogrametria con drones
Graphic obtained through the aerial photogrammetry technique with drones.
  1. Precision and Accuracy: One of the greatest benefits of photogrammetry in public infrastructure construction is its ability to provide precise and accurate measurements. High-resolution aerial and ground images capture minute details of the terrain and existing structures. This allows engineers and architects to work with reliable data to make critical decisions in project design and execution.
  2. Reduction in Project Costs and Time: Photogrammetry significantly speeds up the topographic survey process and data capture. Compared to traditional manual measurement techniques or total stations, photogrammetry saves considerable time and resources. This results in reduced project costs and faster completion of public works.
  3. Improved Planning and Design: Photogrammetry provides a comprehensive and detailed view of the construction environment. Engineers and designers can use three-dimensional models to analyze the terrain, identify potential challenges, and optimize the placement of infrastructure. This leads to a more efficient design and the minimization of unforeseen problems during construction.
  4. Progress Monitoring and Control: During project execution, photogrammetry can be used for progress monitoring and control. By comparing images before and after the works, it is possible to evaluate the progress and quality of the work. This facilitates timely decision-making and allows deviations to be corrected before they become costly problems.
  5. Safety and Risk Reduction: Photogrammetry also contributes to improving safety in public works. By providing detailed information about terrain and site conditions, construction teams can identify and mitigate potential risks. Additionally, accurate planning reduces the likelihood of accidents and mishaps.
  6. Complete Project Documentation: Photogrammetry creates complete project documentation that includes images, 3D models, and detailed measurements. This is invaluable for future references, maintenance and possible infrastructure expansions. It also facilitates communication with stakeholders and reporting to regulatory authorities.
  7. Improved Decision Making: By having accurate and updated data in real time, project managers and authorities can make informed and strategic decisions. This is especially important in public infrastructure projects, where the financial and social implications are significant.
  8. Minimizing Environmental Impact: The ability to accurately assess terrain and environmental conditions allows project planners to minimize environmental impact. This includes protecting sensitive areas and implementing measures to reduce the ecological footprint of the building.

This technology has proven to be a valuable tool for engineers and architects working on public infrastructure projects, contributing to the creation of more efficient, sustainable and safe infrastructure for communities around the world. Contact Acero Estudio and request more information about our aerial photogrammetry service with the use of drones.

Photogrammetry with Drones and its advantages for Urban and Rural Digital Restitution

representacion digital de terreno obtenida mediante la tecnica de la fotogrametria con drones

One of the most requested technologies from Acero Estudio is photogrammetry with drones, a set of methods, software and hardware (with drones) that is not only changing the way civil projects are executed but also speeds up and achieves greater efficiency in construction projects. digital restitution in urban and rural areas.

The representations achieved through photogrammetry enable the creation of accurate digital representations while enabling a number of key benefits for project planning and development in these diversified environments.

Creating accurate 3D models

Drone photogrammetry offered by Acero Estudio, a company specialized in photogrammetry and BIM, stands out for its ability to generate precise and detailed three-dimensional models of urban and rural areas. This is achieved by capturing multiple aerial images from different angles and altitudes, which are then processed to create a digital model of the terrain. This digital model, often known as an orthophoto or mosaic, serves to achieve a faithful digital representation of the area in question.

Practical Case

A municipality needs to update its urban plan to allow for sustainable growth. Thanks to photogrammetry, an accurate digital representation of the city can be created, including buildings, streets, vegetation and bodies of water. This digital representation will serve as a basis for future analysis and planning.

Efficient Planning

The availability of accurate digital representations is very useful for effective planning in urban and rural environments. Data generated through drone photogrammetry allows planners and designers to make informed decisions about infrastructure siting, natural resource management, and land use planning. This significantly reduces the margin of error, minimizing risks associated with any large project.

Practical Case

In a region prone to flooding, photogrammetry is used to generate various digital representations that are very useful to identify flood-prone areas, allowing corrective and protective measures to be taken in the surrounding areas.

Change Analysis

Drone photogrammetry allows for monitoring changes over time. This is especially valuable in constantly evolving urban and rural environments. Drones can perform regular inspections to capture updated images and detect significant changes to the landscape or infrastructure.

Practical case

A municipality seeks to evaluate the impact of an urban development project and for this drone photogrammetry can be used to track the evolution of the area over several years. This allows them to make data-driven decisions and adjust their planning as necessary.

Access to Remote Areas

In difficult-to-access rural areas, drone photogrammetry becomes an invaluable tool. Drones can reach remote and hard-to-reach places, allowing data capture in mountainous areas, dense forests or rugged terrain. This expands the possibilities of collecting accurate information in environments that were previously inaccessible or expensive to study.

Practical Case

In the preservation of remote natural areas, drones can be used to monitor the health of the ecosystem and detect signs of deforestation or erosion in places that are difficult to access or at risk for people.

If you want to know more about photogrammetry or other services that Acero Estudio offers, do not hesitate to write to us, we are here to support you in your construction or engineering projects in adverse environments.