![]() ![]() This is just a warning because the files weren't scanned by Google Drive, and no indication of a real infection. Google Drive: If you're downloading 1" or 3" models, depending on the download-method, you may get a virus warning for some files. zip files within your file manger > right mouseclick > "7-Zip" > "Extract Here" You can use any file archiver to decompress them, I recommend using 7-Zip. On the other hand the 20m and 50m models just contain the individual country's pure sourcedata. Thus you can replace used SRTM tiles by simply overwriting them with the tiles from here without getting data gaps. The tiles of the 1" and 3" models are cross-country entirely filled with elevation data: where available using LiDAR data, otherwise with SRTM data. Because of their finer grid the 20m-DTMs are more precise than the 50m-DTMs but on the other hand also much larger regarding download- and filesizes. Their horizontal resolution is 20 x 20 m (20m) and 50 x 50 m (50m), and their vertical resolution is 0.1 m. The 20m and 50m models are provided as GeoTIFF elevation files. Because of their finer grid the 1"-DTMs are more precise than the 3"-DTMs but on the other hand also much larger regarding download- and filesizes. 60 x 90 m (3"), and their vertical resolution is 1 m. The 1" and 3" models are split into several 1 x 1° files in the popular file format of the SRTM datasets (.hgt files). No need to individually download thousands of files and put them together on your own for a country One-click downloads of whole countries or even whole Europe.No complicated convertions between dozens of fileformats and projections necessary Provide them in unique fileformats and geographic projections.Such fine grid sizes are hardly needed (and if so: download the original source files -) No need to download hundreds of GB of files with grid sizes of 2 m or even less of just one country. Create them with appropriate grid sizes and hence keep the file- and download sizes as compact as possible to still benefit from the excellent source data.Intended use cases are for example elevation grids for flight simulator sceneries, contour lines for hiking maps, calculation of accurate elevation differences of outdoor sports tracks. ![]() Based on the best available OpenData sources of a country (LiDAR or at least good photogrammetry).My goals of this project are to collect, edit and publish Digital Terrain Models of Europe: Especially in wooded areas, steep rocky terrain or narrow valleys.Ĭomparison: Maps based on LiDAR-DTM versus SRTM-DTM The accuracy and resolution of my models' elevations compared to satellite-based surveys like ASTER, ALOS, COPERNICUS or SRTM is significantly better. They have been surveyed using the method of Airborne Laserscan (ALS). These Digital Elevation Models (DEM), exactly Digital Terrain Models (DTM) - in contrast to Digital Surface Models (DSM) - are based on precise LiDAR elevation sources. : Romania v1, Croatia v1, Italy v2, EUROPE v21.: France v3, Czechia v1, Hungary v1, Lithuania v1, EUROPE v20.: Norway_Mainland v2, Norway_Svalbard v1, Norway_Jan Mayen v1, Denmark_Faroes v1, United Kingdom v2, Ireland v1, Portugal_Mainland v0, Portugal_Madeira v1, Portugal_Azores v1, EUROPE v18.: Germany v2, Luxembourg v2, EUROPE v17.If you don't want to use PayPal or credit card, you can also donate via bank transfer, just ask for my account details. Since I'm not a professional I appreciate, if you honor my voluntary work by supporting me with a Donation - Thank you very much! Further to search for errors, plug gaps within the data, compile, resample it and create files in useful formats.Īnd finally to provide them to you, FOR FREE. I spent Hundreds of hours during my leisure time to search for new Opendata source files, get in contact with national public authorities and to download those giant amounts of data. Welcome to my Website! I am a geographic enthusiast from Austria and back in 2016 I started collecting and compiling free Digital LiDAR Terrain Models ("DTMs"). ![]() SONNY's LiDAR DIGITAL TERRAIN MODELS (DTM) OF EUROPEAN COUNTRIES ![]()
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