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Buildings 3D

The 3D vectors for buildings are three-dimensional instances of the Building target category in the National Topographic Database (KMTK). The 3D vectors are produced with a high degree of automation from laser scanning data 5 p based on 2D vectors for buildings in KMTK. For the time being, data is available only from a few example areas, but the coverage will be extended to the whole of Finland as the laser scanning programme proceeds.

The product belongs to the open data of the National Land Survey of Finland.

Purpose:

The 3D vectors for buildings can be used as the source data for a visual cityscape and utilised in land use planning and analyses related to determining the solar energy potential of buildings, for example.

Geographic location
Entire Finland
Reference system
ETRS89 / TM35FIN(E,N) (EPSG:3067)
EPSG:3900
Spatial representation
Vector
Spatial representation info
Full surface graph
Data content

The produced building 3D vectors have been modelled in accordance with the recommendation JHS210 Paikkatiedon mallintaminen: Rakennukset ja rakennelmat (Spatial data modelling: buildings and structures) https://www.suomidigi.fi/ohjeet-ja-tuki/jhs-suositukset/jhs-210-paikkatiedon-mallintaminen-rakennukset-ja-rakennelmat

The 3D vectors correspond to level of detail 2 (LoD2), and their surfaces have been supplemented with semantic information about the surface type (floor, ceiling, wall).

Latest update
27.1.2022
Maintenance

As a general rule, the generation of the data follows the schedule of the national laser scanning programme. The aim is to complete the data for each laser scanning production area during the year following the scanning. The generation of the data can be monitored with the production status map of the National Land Survey of Finland: https://tilannekartta.maanmittauslaitos.fi/3drakennukset..

Lineage

At this stage, quality requirements have not been defined for 3D vectors for buildings produced by the National Land Survey of Finland. The generation of the data is highly automated.

Factors that affect the quality of the data include:

Vectoring logic

- 3D vectors are produced based on a data-driven process

2D vectors

- The generation of the data is based on 2D vectors for buildings, which means that the location accuracy of the data on which these two data types are based is identical.

Point cloud data

- The quality of point cloud data affects the quality of 3D vectors.

The data is geometrically complete and, taking into account the above-mentioned factors, tries to model reality as accurately as possible.

Responsible party

National Land Survey of Finland

Conditions applying to access and use
Distribution format
CityGML
Distribution channels
Not based on a decree