Control points
Control points and their coordinates and elevations define in practice the reference system for coordinates and elevations used in Finland.
The NLS benchmark register contains information about nationwide control points and benchmarks. The marks are mainly horizontal and elevation control points in classes 1–3 measured by the National Land Survey of Finland.
The product belongs to the open data of the National Land Survey of Finland.
Purpose:
Control points can be used as starting points in surveying and as anchor points in coordinate and height transformations.
Geographic location
Entire Finland
Reference system
ETRS89 / TM35FIN(E,N) (EPSG:3067)
KKJ / Finland Uniform Coordinate System (EPSG:2393)
N2000 height (EPSG:3900)
N60 height (EPSG:5717)
Scale
10000
Spatial representation
Text or table
Spatial representation info
Geometry only
Data content
The control point data includes the coordinates (coordinate reference systems: EUREF-FIN and KKJ = the national grid coordinate system) and the elevation of the points (height systems: N2000 and N60) as well as their other attributes. The attributes include for example information of measurement method of coordinate and height values. Codes can be seen in code catalogue page: http://luettelopalvelu.fi/codelist
Maintenance
Maintenance
The NLS benchmark register is updated once a year at the beginning of the year.
The product is available from the NLS MapSite's Download geospatial data -section according to the above-described updating rhythm.
Quality information
Lineage
Earlier, the method used for determining horizontal control points was triangulation but now satellite surveying is used. The elevation control points have been determined by levelling. The dataset Control points contains points with different levels of accuracy; the information about the accuracy class is included in the control point information.
Distribution and further information
Responsible party
National Land Survey of Finland
Conditions applying to access and use
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).
Distribution format
csv-file
Pricing
Control points
| Product | Price € (excl. VAT) | Price € (incl. VAT) |
|---|---|---|
|
77103011000
Control point coordinate information, 1–14 triangulation or height points
|
21,75 | 27,30 |
|
77103011001
Control point coordinate information, more than 14 triangulation or height points, EUR per coordinate point
|
1,55 | 1,95 |
|
77103011002
Control point benchmark report card, 1–3 pcs
|
21,75 | 27,30 |
|
77103011003
Control point benchmark report card, more than 3 pcs
|
5,50 | 6,90 |
Not based on a decree