Swedish Elevation Model: Difference between revisions

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[[Category: Online Data]][[Category: Digital Elevation Models]]
[[Category: Online Data]][[Category: Digital Elevation Models]][[Category: InnoWind]]
[[Image:ExampleGSDSweden.png|right|thumb|350px|GSD Data in WindPRO - Site near Oscarshamn.]]
== Introduction ==
== Introduction ==
The GSD Elevation Data for Sweden. The dataset consists of a 50 meter grid.
The GSD Elevation Data for Sweden. The dataset consists of a 50 meter grid. The national elevation model was produced during 2009-2017 using airborne laser scanning. A grid with 1 m resolution is produced by linear interpolation in a TIN (Triangulated Irregular Network), constructed from laser points representing ground and water. Grid 50+ is based on this data set. A 5 m grid is interpolated from the 1 m grid, then 10 m from 5 m, 20 m from 10 m, and finally 50 m from 20 m. Bilinear interpolation is used for this interpolation. This chain of interpolations means that every height value is representative for a larger area than if the 50 m grid was produced by selecting heights directly from the 1 m grid.


The national elevation model was produced during 2009-2017 using airborne laser scanning.
=== Dataset Overview ===
A grid with 1 m resolution is produced by linear interpolation in a TIN (Triangulated
* '''Spatial Coverage:''' Sweden nationwide coverage
Irregular Network), constructed from laser points representing ground and
* '''Resolution:''' 50 m grid
water. Grid 50+ is based on this data set.
* '''Data-type:''' [[:Category%3ADigital_Elevation_Models#What_type_of_elevation_model.3F_DEM.2C_DSM_and_DTM.3F|Digital Terrain Model (DTM)]]
A 5 m grid is interpolated from the 1 m grid, then 10 m from 5 m, 20 m from 10 m,
* '''Coordinate system:''' SWEREF 99 TM (EPSG:3006) in original data
and finally 50 m from 20 m. Bilinear interpolation is used for this interpolation. This
* '''Version:''' Data downloaded in 2018.
chain of interpolations means that every height value is representative for a larger
* '''Vertical Accuracy:''' N/A
area than if the 50 m grid was produced by selecting heights directly from the 1 m
 
grid.
== Usage Notes ==
GSD-Elevation data, grid 50+ is nationwide. However, the production of a new Swedish national elevation model is not yet complete. The grid data from Lantmäteriet is updated once a year as as the productions continues.
Production of the national elevation model can be followed at Lantmäteriets homepage. See [https://www.lantmateriet.se/sv/Kartor-och-geografisk-information/geodataprodukter/stodsidor/hojddata---nationell-hojdmodell/ here].


== Availability from within WindPRO ==
== Availability from within WindPRO ==
The data are available directly from within windPRO in 50 meter resolution. The data can be accessed from the online-services in the following objects:
The data are available directly from within windPRO in 50 meter resolution. As a part of the processing of the GSD elevation data from our EMD server, the user has an option of choosing if the data downloaded should be received as either raw gridded data or converted to height contour lines. In order to use the data for energy yield calculations, the data must be converted to contours. The data can be accessed from the online-services in the following objects:


* Line Object (with purpose to height contour lines)
* Line Object (with purpose to height contour lines)
* Elevation Grid Object
* Elevation Grid Object


== Data Type ==
== License and Attribution ==
The GSD Elevatiopn Data are delivered as gridded data with a spatial resolution of 50 meters. As a part of the processing of the GSD Elevation Data from our EMD server, the user has an option of choosing whether the data downloaded should be received as either raw gridded data or converted to height contour lines. In order to use the data for energy yield calculations, the data must be converted to contours.
The product belongs to the open data of the Swedish Geodata Agency (Lantmäteriet). The data have been released through the Creative Commons Zero (CC0) license.  While the CC0 license does not require attribution, EMD recommends to use one – such as the following:


The elevation grid is in coordinate system: SWEREF 99 TM (EPSG:3006)
<pre>
Source: Contains GSD elevation data from Lantmäteriet, Sweden.
Distribution through EMD and windPRO.
</pre>


== Coverage ==
== Acknowledgements ==
GSD-Elevation data, grid 50+ is nationwide. However, the production of the national elevation model is not yet complete but the grid will be completed as the productions continues.
* Lantmäteriet, Sweden for the dissemination of the GSD-Höjddata (GSD-Elevation Data) are thanked for making this great digital elevation dataset available in the public domain and thus for aiding the development of renewable energy.
Production of the national elevation model can be followed at Lantmäteriets homepage. See www.lantmateriet.se/geolex, under Höjddata.
* Integration of this dataset into EMD services was co-supported through the InnoWind project ([http://www.innowind.dk www.innowind.dk) which is co-funded by the Danish Innovation Fund


== External Links ==
== External Links ==
* More information on GSD Elevation is available at https://www.lantmateriet.se/sv/Kartor-och-geografisk-information/Hojddata/GSD-Hojddata-grid-50-/
* More information on GSD Elevation is available at https://www.lantmateriet.se/sv/Kartor-och-geografisk-information/Hojddata/GSD-Hojddata-grid-50-/
 
* InnoWind project - http://www.innowind.dk
== Acknowledgement ==
Lantmäteriet, Sweden for the dissemination of the GSD-Höjddata (GSD-Elevation Data) are thanked for making this great digital elevation dataset available in the public domain and thus for aiding the development of renewable energy.

Latest revision as of 14:24, 24 June 2020

GSD Data in WindPRO - Site near Oscarshamn.

Introduction

The GSD Elevation Data for Sweden. The dataset consists of a 50 meter grid. The national elevation model was produced during 2009-2017 using airborne laser scanning. A grid with 1 m resolution is produced by linear interpolation in a TIN (Triangulated Irregular Network), constructed from laser points representing ground and water. Grid 50+ is based on this data set. A 5 m grid is interpolated from the 1 m grid, then 10 m from 5 m, 20 m from 10 m, and finally 50 m from 20 m. Bilinear interpolation is used for this interpolation. This chain of interpolations means that every height value is representative for a larger area than if the 50 m grid was produced by selecting heights directly from the 1 m grid.

Dataset Overview

  • Spatial Coverage: Sweden nationwide coverage
  • Resolution: 50 m grid
  • Data-type: Digital Terrain Model (DTM)
  • Coordinate system: SWEREF 99 TM (EPSG:3006) in original data
  • Version: Data downloaded in 2018.
  • Vertical Accuracy: N/A

Usage Notes

GSD-Elevation data, grid 50+ is nationwide. However, the production of a new Swedish national elevation model is not yet complete. The grid data from Lantmäteriet is updated once a year as as the productions continues. Production of the national elevation model can be followed at Lantmäteriets homepage. See here.

Availability from within WindPRO

The data are available directly from within windPRO in 50 meter resolution. As a part of the processing of the GSD elevation data from our EMD server, the user has an option of choosing if the data downloaded should be received as either raw gridded data or converted to height contour lines. In order to use the data for energy yield calculations, the data must be converted to contours. The data can be accessed from the online-services in the following objects:

  • Line Object (with purpose to height contour lines)
  • Elevation Grid Object

License and Attribution

The product belongs to the open data of the Swedish Geodata Agency (Lantmäteriet). The data have been released through the Creative Commons Zero (CC0) license. While the CC0 license does not require attribution, EMD recommends to use one – such as the following: 

Source: Contains GSD elevation data from Lantmäteriet, Sweden. 
Distribution through EMD and windPRO.

Acknowledgements

  • Lantmäteriet, Sweden for the dissemination of the GSD-Höjddata (GSD-Elevation Data) are thanked for making this great digital elevation dataset available in the public domain and thus for aiding the development of renewable energy.
  • Integration of this dataset into EMD services was co-supported through the InnoWind project ([http://www.innowind.dk www.innowind.dk) which is co-funded by the Danish Innovation Fund

External Links

Retrieved from "http://help.emd.dk/mediawiki/index.php?title=Swedish_Elevation_Model&oldid=11904"