German Saxony Elevation Models

Elevation models DGM2 (left) and DGM20 (right). Part of wind farm south of Wermsdorf, Saxony. Color legend uses a 10m equidistance.

Coverage of the DTM (DGM).

Introduction

The elevation model of the German Bundesland of Saxony (Sachsen) is a digital terrain model produced from data originally obtained from the open geodata of Saxony. It is produced and delivered by the Staatsbetrieb Geobasisinformation und Vermessung Sachsen (GeoSN). Two elevation models are delivered with windPRO: one at 5m resolution and one at 20m resolution. The original models are available at a maximum resolution of 1m and 2m, however, the highest resolution model in windPRO version is resampled by EMD to obtain a slightly coarser resolution - 5m. This is done in order for the data to be operational for the larger domains needed in the context of wind farm analysis’ and wind flow modelling. The resampling is made based on 2m data using a bi-linear interpolation algorithm. Data made available by EMD represents the data status of October 2019.

Dataset Overview

• Spatial Coverage: Bundesland of Saxony
• Resolution: 2m and 20m (in windPRO)
• Data-type: Digital Terrain Model (DTM)
• Coordinate system
  • Horizontal: ETRS89/UTM33 (EPSG 25833)
  • Vertical: DHHN2016 (EPSG 7837) - Deutsche Haupthöhennetz 2016
• Version: Data were downloaded in october 2019. Data originates from years 2008-2019, dependent on area (see map to the right).
• Accuracy:
  • Vertical: For the 2m resolution dataset the vertical accuracy is stated to be ±0.3m (given as a 95% confidence, 2 sigma)
  • Horizontal: For the 2m resolution the horizontal accuracy is ±0.5m (given as a 95% confidence, 2 sigma)

Availability from within WindPRO

The data are available directly from within windPRO in 5-meter and 20-meter grid resolution. Please note that for the 5-meter grid - the downloaded area is limited to 10 km x 10 km to keep the files at a usable size. The data within the elevation object may be extended with coarser data fo a bigger area if needed. 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 geo-data of the Bundesland of Saxony. The data have been licensed under a Data license Germany – attribution – version 2.0 (Datenlizenz Deutschland - Namensnennung - Version 2.0) -"dl-de/by-2-0".
Please accept the license conditions and use a proper attribution when using this dataset, such as:

Contains modified elevation data from GeoSN (www.geodaten.sachsen.de). 
Adapted and distributed by EMD and windPRO. “dl-de/by-2-0".

Acknowledgement

• The GeoSN are thanked for producing this digital elevation dataset – and disseminating it in the public domain and thus for aiding the development of renewable energy and wind energy in particular.
• Integration of this dataset into EMD services - was co-supported through the InnoWind project (www.innowind.dk) - which is co-funded by the Danish Innovation Fund

External Links

1. Site with description of the elevation model (in German language): https://www.geodaten.sachsen.de/
2. InnoWind project: http://www.innowind.dk