SKY/opegieka: aerial survey & remote sensing

Between 2021 and 2023, we produced two full 3D datasets of Kraków for the City of Kraków. Over approximately 580 km², we acquired high-resolution vertical imagery, oblique imagery in four directions and LiDAR data exceeding 20 points/m², and a year later we repeated the entire flight and processing cycle. The city received two generations of 5 cm orthophotos, oblique orthophotos, DTM/DSM and 3D mesh models covering its entire area. Comparing the two shows how the city changed within a year. It also feeds the 3D part of the municipal Observatory Portal, built on our SimplyGEO platform and hosted by us for the city, so users can explore Kraków in 3D straight from a web browser, without GIS software. The hardest part was the UNESCO-listed Old Town, with its dense historic buildings, varied roof shapes and wealth of architectural detail that the model had to reproduce.

Kraków 2021 vs 2023 – 3D model comparison

In 2022–2023, we mapped approximately 550 km² of Warsaw, Poland's largest city, where historic districts and dense housing estates sit next to high-rise business quarters and extensive infrastructure. By combining 5 cm RGB orthophotos, oblique imagery captured from multiple directions and LiDAR data at 30 points/m², we built detailed 3D mesh models of the entire city. City departments now have one current dataset for the whole capital to work from when planning, preparing investments or presenting projects to residents.

Warsaw – Wola business district, oblique aerial image

W 2023 roku, na zlecenie Głównego Urzędu Geodezji i Kartografii, przygotowaliśmy pełny zestaw danych 3D dla 24 km² Malborka, razem z zamkiem krzyżackim wpisanym na listę UNESCO. Był to pierwszy projekt 3D mesh zamówiony przez GUGiK, od którego zaczął się krajowy program obejmujący później m.in. Zieloną Górę i Zakopane. Pozyskaliśmy zdjęcia pionowe i ukośne o rozdzielczości 5 cm oraz dane LiDAR o gęstości 12 pkt/m², a następnie opracowaliśmy ortofotomapy, ortofotomapy ukośne, NMT, NMPT i oteksturowane modele 3D mesh. Od lutego 2024 roku dane są częścią państwowego zasobu geodezyjnego i kartograficznego, a w serwisie geoportal.gov.pl można je bezpłatnie pobrać. Mogą z nich korzystać zarówno urzędy, jak i projektanci.

Malbork – Teutonic castle on the Nogat river as a 3D mesh model

Malbork – Teutonic castle as a 3D mesh model

In 2015-2019, we executed four times the project related to scanning of the Polish marine coastal zone for the purposes of the Maritime Office in Gdynia. The scope of the project provided for carrying out photogrammetric flight missions as result of which we acquired the data used for monitoring and analysis of the environmental changes. By using the scanner which emits laser at two different frequencies, we succeeded in collecting the essential topographic and bathymetric data.

In 2015-2017, we executed two projects on the territory of the Republic of Lithuania. The projects were associated with acquisition and development of a point cloud (density higher than 30 points/m2) for ten biggest towns, as well as taking aerial images and preparing an orthophoto map of the entire country. The real challenge that our team had to face was to process, in a very limited period of time and in relation to a large area, dense point clouds captured by means of VQ-1560i-DW scanner.

Analysis and development of a dense point cloud

For the purposes of executing the project we captured aerial images characterised by ground sample size not exceeding 5 cm, where longitudinal overlap range was at the level of 78% and transverse overlap range at the level of 88%. Such dense values resulted from the specific requirements defined by the Ordering Party. The distance between buildings taller than 50 cm and the nadir point could not exceed 80 metres. The economic execution of the project required dynamic planning of the flight missions in order to ensure the overlap range parameters of the imagery.

Preparation of an orthophoto map for Wrocław

In 2017-2019, we monitored the forest stand in the Polish part of the Białowieża Forest by means of taking aerial images and developing orthophoto maps. The analysis of those images/photographs and maps may facilitate implementing actions aimed at protection of the site of high natural value, which is included on the list of UNESCO World Heritage Sites.

In 2018, we carried out another project involving the use of IGI DigiThermdo airborne thermal camera in order to capture the images necessary to draw up the thermal map of Elbląg. It was the first time that we had applied artificial intelligence for analysing thermal imaging with the use of vector data concerning the distribution network and for predicting the locations of potential failures and defects. The project provided the local heat supplier with excellent materials in respect of conducting further analyses and planning activities.

In 2017, we developed an orthophoto map and a point cloud for the city of Rybnik. It was the first time that we had changed the combination of the sensors to be installed for the purposes of the project, mounting the scanner and large-format camera on board SP-OPG aircraft. Therefore, we were able to capture two types of data, i.e. LiDAR and large-format aerial photographs, during one flight mission. In this way we managed to reduce the time necessary for the flight missions, take advantage of just one weather window, avoid differences arising from changeable weather conditions and terrain changes occurring as a result of the time-lags between particular flight missions.

Synchronous acquisition of remote sensing data

Projects

Locations of our operations

Selected projects

Selected projects

GUGiK’s first 3D mesh model, in Malbork

Monitoring of the marine coastal zone

Analysis and development of a dense point cloud

Preparation of an orthophoto map for Wrocław

Monitoring of the Białowieża Forest

Preparation of a thermal map for Elbląg

Synchronous acquisition of remote sensing data

OPEGIEKA Sp. z o.o.

Head Office

Office in Warsaw