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NLS orthophotos

NLS Orthophotos are an aerial photo dataset covering the whole of Finland. An orthophoto is a combination of several individual aerial photos. The geometry of the orthophotos corresponds to a map.

The aerial photo data set in orthophoto format is available as

- the most recent data set consisting of the most recent aerial photos available. The most recent data is usually 1–3 years old.

- old aerial photos, consisting of data sets that are older than the most recent data set. The oldest aerial photos were taken in the 1930s. New data is added to the data set continuously.

NLS Orthophotos are updated every 3 to 10 years.

The product belongs to the open data of the National Land Survey of Finland. The latest orthophotos can be downloaded free of charge from the File service of open data.

Purpose:

Orthophotos are utilized for mapping and also for planning and monitoring the environment. Colour or black-and-white orthophotos are suitable for planning or as background material for various map presentations. Colour-IR orthophotos are best suitable for forest inventory.

Geographic location
Entire Finland
Reference system
ETRS89 / TM35FIN(E,N) (EPSG:3067)
N2000 height (EPSG:3900)
Pixel size
0.25 m
0.5 m
Spatial representation
Raster
Data content

Product versionsFilm, black-and-white

Pixel size 0.5 metres.

Normal size 10,000 x 10,000 pixels (general map-sheet division, KKJ).

Normal size 12,000 x 12,000 pixels (TM35 map-sheet division, ETRS-TM35FIN) consists of a maximum of 256 different greyscale values (8 bit).

Film, colour-IR

Pixel size 0.5 m.

Normal size 10,000 x 10,000 pixels (general map-sheet division, KKJ).

Normal size 12,000 x 12,000 pixels (TM35 map-sheet division, ETRS-TM35FIN) consists of three colour channels (near-IR, red, green).

Each colour channel contains a maximum of 256 different shade values (8 bit).

Digital, colour

Pixel size 0.5 m.

Normal size 12,000 x 12,000 pixels (TM35 map-sheet division, ETRS-TM35FIN) consists of three colour channels (red, green, blue).

Each colour channel contains a maximum of 256 different shade values (8 bit).

Digital, colour-IR

Pixel size 0.5 m.

Normal size 12,000 x 12,000 pixels (TM35 map-sheet division, ETRS-TM35FIN) consists of three colour channels (near-IR, red, green).

Each colour channel contains a maximum of 256 different shade values (8 bit).

Digital, colour

Pixel size 0.25 m.

Normal size 6,000 x 6,000 pixels (TM35 map-sheet division, ETRS-TM35FIN) consists of three colour channels (red, green, blue).

Each colour channel contains a maximum of 256 different shade values (8 bit).

Digital, colour-IR

Pixel size 0.25 m.

Normal size 6,000 x 6,000 pixels (TM35 map-sheet division, ETRS-TM35FIN) consists of three colour channels (near-IR, red, green).

Each colour channel contains a maximum of 256 different shade values (8 bit).

Maintenance

The updating frequency of product versions Digital, colour 0.5 m and Digital, colour-IR 0.5 m is 3–10 years, depending on the area. The most up-to-date version is available via our service interfaces and browsing services.

Other product versions do not have a maintenance plan.

Coverage index maps (in Finnish): https://www.maanmittauslaitos.fi/laserkeilaus-ja-ilmakuvaus.

Lineage

NLS Orthophotos is the only set of aerial photographs that covers the whole of Finland.

Orthophotos are available as of 1995. Starting from 2009, orthophotos are also available in colour and colour-infrared format. The coordinate reference system used in the photo shoots until 2007 was KKJ, i.e. the national grid coordinate system (zones of the coordinate reference system). As of 2008, the coordinate reference system used in aerial photos has been ETRS89/TM35FIN.

Starting from 2014, orthophotos with a 0.25 m pixel size are available for some random areas.

The accuracy of an orthophoto depends on the sensor used in aerial photography, the photographing altitude and the elevation model used in producing the orthophoto. The elevation model has the biggest influence on the geometrical accuracy of the photo. The positional accuracy of an orthophoto is 0.5–2 metres.

The product can be printed out on scale ranging from 1:1 000.

Responsible party

National Land Survey of Finland

Conditions applying to access and use
Distribution format
Tiff (tfw)
Further information

The metadata of the orthophotos is provided by request.

Processing fees for NLS orthophotos

Product Price € (excl. VAT) Price € (incl. VAT)
77103010030
Orthophoto, first photo (max 6 km * 6 km)
92,02 114,10
77103010031
Orthophoto, following photos
15,73 19,51
77103010032
Orthophoto, entire Finland
3150,00 3 906,00
77103010033
Orthophoto, all photos from one year
1575,00 1 953,00
Not based on a decree