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 years (in Northern Lapland 12 years).

Different versions of orthophoto products:

- Ortophoto

- Ortophoto, false colour

- Ortophoto, forest ortho

- Ortophoto, natural disasters

In addition, there is an index map available presenting the year, when the newest photo was taken in each square.

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

Date (Revision): 2010-04-01

Unique resource identifier: http://paikkatiedot.fi/so/1000244

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. False colour orthopohotos and forest orthos are best suitable for, e.g. forest inventory.

Owner

National Land Survey of Finland

Maintenance and update frequency: As needed

Maintenance note: New colour and false colour images are taken every three years, except for North Lapland, which is photographed approximately every 12 years. Aerial photography plans can be seen on the status map https://tilannekartta.maanmittauslaitos.fi/ilmakuva

In addition, product called Ortophoto (forest ortho) is available. The product is similar to Ortophoto (false colour), but colours have been adjusted in order to perceive coniferous and deciduous forests better.

Other product versions are not updated.

The index map of old aerial photos can be seen in Paikkatietoikkuna https://paikkatietoikkuna.fi/historiallisetilmakuvat

The most up-to-date data is available in the interface and viewing services (see Distribution and further information).

The updating status varies by feature depending on the progress of updating.

Owner

National Land Survey of Finland - ( )

Paikkatietohakemiston asiasanasto

Environment
Built environment
Terrain and land cover
Waterbodies
avoindata.fi
Orthophotos
Aerial photos

GEMET - INSPIRE themes, version 1.0

Orthoimagery

Alueellinen laajuus

National

EU legislation

High-value dataset categories

Earth observation and environment

Access constraints: Other restrictions

Other constraints: no limitations to public access

Use constraints: Other restrictions

Other constraints: Attribution 4.0 International (CC BY 4.0)

Other constraints: Mention the name of the Licensor (the National Land Survey of Finland), the name of the dataset(s) and the time when the National Land Survey has delivered the dataset(s) (e.g.: contains data from the National Land Survey of Finland Topographic Database 06/2014).

Spatial representation type: Grid

Distance: 0.5 m

Metadata language: Finnish

Topic category

Imagery base maps earth cover
Location
Inland waters
Environment

Supplemental Information: The metadata of the orthophotos is provided by request.

Reference system identifier: EPSG / ETRS89 / TM35FIN(E,N) (EPSG:3067) / 8.6

Distribution format

Tiff (tfw) ( 1.0 )
JPEG2000 ( 1.0 )

Transfer size: 4000000

OnLine resource: MapSite Download geospatial data section

OnLine resource

Karttakuvapalvelu (WMS) ( WWW:LINK-1.0-http--link )

Karttakuvapalvelu (WMS)

OnLine resource

Karttakuvapalvelu (WMTS) ( WWW:LINK-1.0-http--link )

Karttakuvapalvelu (WMTS)

OnLine resource: Ortokuvien ja korkeusmallien kyselypalvelu (WCS) ( http://www.opengis.net/def/serviceType/ogc/wcs )

OnLine resource

Maanmittauslaitoksen karttakuvapalvelu (WMS) ( WWW:LINK-1.0-http--link )

Maanmittauslaitoksen karttakuvapalvelu (WMS)

OnLine resource

Ortokuvien ja korkeusmallien kyselypalvelu (WCS) ( WWW:LINK-1.0-http--link )

Ortokuvien ja korkeusmallien kyselypalvelu (WCS)

OnLine resource: Paikkatiedon tiedostopalvelu (OGC API Processes) ( WWW:LINK-1.0-http--link )

OnLine resource: Hakemistokäyttöliittymä ( WWW:LINK-1.0-http--link )

Hierarchy level: Dataset

Conformance result

Date (Publication): 2010-12-08

Pass: Yes

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

Starting from 2009, orthophotos are also available in colour and false colour 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.

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.

Content Information

No information provided.

Included with dataset: No

Date (Revision): 2020-09-18

Other citation details: Film, 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, false colour

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, false 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 (near-IR, red, green).

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