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Terrain Model Download, grid 50+ is a terrain model containing points with coordinates and height values in a regular grid with 50 meter spacing. Previously, the product was called Elevation data, grid 50+. The product name in Swedish is Markhöjdmodell Nedladdning, grid 50+.
About this product
Terrain Model Download, grid 50+ is available in two different variants. One based on the National Elevation model and one based on data from the 1980s produced by photogrammetric measuring of profiles and digitalization of old maps.
To differentiate the two variants of Elevation data, grid 50+, the one based on the National Elevation model has the prefix nh and the one based on old data has the prefix hdb.
Examples of applications
- generation of height contours and for development of digital terrain models that depict the landscape in three dimensions.
- calculations and analyses for creation of altitude- and terrain shading in maps
- gravity determinations
- geometric correction of satellite images
The product also provides valuable information for route planning. By adding elevation data to, for example, the information contained in the product Topography 100 Download, vector, one can calculate a more suitable route.
Geographical selection: Index tiles ( 100 x 100 km), county, Sweden.
Delivery formats: LZW-compressed GeoTIFF, ASCII-table
Coordinate systems: SWEREF 99
Maintenance and update frequency
Grid 50+ (nh) is updated once per year. Grid 50+ (hdb) is not updated.
Fact sheets and reports
It is free to disseminate the information below to organizations and / or individuals who may have an interest in altitude data.
Fact sheets:
- New national height model (in Swedish, pdf, new window)
- Airborne laser scanning (in Swedish, pdf, new window)
Reports from Lantmäteriet:
- Preliminary study of surface models using image matching (pdf, new window)
- Cartographic information from laser data (in Swedish, pdf, new window)
- Height model texture (in Swedish, pdf, new window)
- The accuracy of the height model (in Swedish, pdf, new window)
- Comparison of overlapping height models (in Swedish, pdf, new window)
- Useful analysis, Elevation data - a prerequisite for climate adaptation (in Swedish, pdf, new window)
- LMV Report 2006: 3, Laser scanning, Falun test project (in Swedish, pdf, new window)
External reports:
- The effect of vegetation and slopes on the uncertainty of laser data for a new national height model (new window)
- Examination of algorithms and software for ground classification of point clouds from airborne laser scanning (new window)
- Calibration of ALS Intesity Data (pdf, new window)
- Accuracy check of laser data for new national height model (in Swedish, pdf, new window)
Documentation
For more detailed information of the content, see the product description and quality description in Swedish or English.
- Produktbeskrivning NH (pdf) - baserad på nationell höjdmodell
- Kvalitetsbeskrivning nationell höjdmodell (tillhör grid 50+, NH)
- Produktbeskrivning HDB (pdf) - baserad på höjddatabanken
- Product description NH (pdf) – from the National Elevation Model
- Quality description of National Elevation Model (relates to grid 50+, NH)
- Product description HDB - from the old Terrain Elevation Databank (pdf)
Download product
The product is provided as open data. Ordering takes place via Geotorget Ordering.
During a transition period, the product can also be retrieved via Retrieve Open Geodata (ftp).
Download open geodata via ftp (new window).
To download via ftp, you need a user account.
Create your user account (ftp, new window)
The user account gives us the opportunity to follow up the use of our open geodata and to feedback to you in the event of any changes.
Have you forgotten your username (new window) or your password (new window)?
Here's more about how to find index boxes you want to download via ftp.