Poland Elevation Model

Coverage of the Poland DTM - here shown as polygons for the about 65000 tiles each 2.2km x 2.35km forming the DTM. The color of the individual tile indicates the year of the campaign, see the legend.

Note: This dataset is currently (2022) being integrated into windPRO. Due to data QA issues, the release is unfortunately somewhat delayed.

Introduction

The Poland Elevation Model is a digital terrain model released from the Head Office of Geodesy and Cartography (Główny Urząd Geodezji i Kartografii, GUGiK), Poland. The dataset is an accurate digital terrain model (DTM) developed as a part of a multi-year data-collection process - with the DTM in windPRO holding data from primarily years 2010-2018. The dataset is mainly made from airborne laser-scans and stereoscopic measurements. The original data is mainly stored as a 1m grid - and in approximately 64000 individual tiles - each sized 2.2km x 2.35km. Three Polish elevation models are delivered with windPRO: at 1m, 5m and 20m grid resolutions. The original model is available at resolution of 1.0m, however, the coarser resolution models (5m, 20m) in windPRO are resampled by EMD. 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 1m data using a bi-linear interpolation algorithm. Data made available by EMD represents the data status of December 2021 and July 2023.

Dataset Overview

• Spatial Coverage: Poland
• Resolution: 1m, 5m and 20 m in windPRO (original data in 1.0m grid resolution as asc-format and xyz-format)
• Data-type: Digital Terrain Model (DTM)
• Coordinate systems:
  • Horizontal: Poland CS92 / ETRS89 - EPSG:2180
  • Vertical: PL-KRON86-NH
• Version: Main parts of the data were downloaded in December 2021. A few tiles where downloaded in June 2023.
• Accuracy:
  • The accuracy depends on the data-source and is not explicitly stated. However, typical accuracies are less than 0.3-0.5m for LiDAR data and less than 1.0m-3.0m for stereo-correlation data.

Usage Notes

• A few - 10 to 15 - tiles in a narrow strip approximately 1.5 km from the eastern boarder did not hold data at the 1m grid resolution. These (few) tiles have not been included in this model.

Availability from within WindPRO

The data are available directly from within windPRO in 1m, 5m and 20-meter grid resolutions. 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

The product belongs to the open geo-data of Poland. The data have been licensed under a national open data policy based on the following legal framework:

• Prawo geodezyjne ikartograficzne (Polish geodetic and cartographic law, article 40a)
• Usage-conditions (web-link, accessed 2021-10-12) - HERE

EMD recommends the following attribution when using this dataset:

Polish Elevation Model. 
Source: 
 - Head Office of Geodesy and Cartography (GUGiK). 
 - https://www.geoportal.gov.pl/dane/numeryczny-model-pokrycia-terenu 
Distribution through EMD and windPRO. 

Acknowledgement

• The Head Office of Geodesy and Cartography (Główny Urząd Geodezji i Kartografii, GUGiK) and the Polish public are thanked for producing this digital elevation dataset – and disseminating it in the public domain and thus for aiding the development of renewable energy.

External Links

1. Description of the elevation model - at the Head Office of Geodesy and Cartography (Główny Urząd Geodezji i Kartografii, GUGiK) - HERE
2. Polish geodata portal (with a lot of nice geodata) - HERE