German Saxony Elevation Models
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 Sazony. 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 (Digitales Geländemodell 1m oder 2m / Digital Elevation Model 1m or 2m). However, the higher resolution model in windPRO version is resampled by EMD to obtain a slightly coarser resolution - 5m - in order for the data to be operational for the larger areas needed in the context of wind farm analysis’. This resampling is made based on 2m data. The laser-scans in the DGM1 model were obtained with a sampling rate of 1-4 points per square meter. A continuous LIDAR measurement campaign is being made, with the whole of the state being completed at a 6-year cycle. The data made available by EMD represents the data status of January 2019.
Acurracy
Vertical accuracy in the 2m resolution dataset is stated to be ±0.3m. The horizontal acurracy in the same resolution dataset is 0.5m. Both values are 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
Reference System
The following reference system were used in the original data:
- ETRS89/UTM33 (EPSG 25833)
- Vertical: DHHN2016 (EPSG 7837) - Deutsche Haupthöhennetz 2016
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 (geobasis.nrw.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
- Site with description of the elevation model (in German language): https://www.geodaten.sachsen.de/
- InnoWind project: http://www.innowind.dk