In the URL shown below, TILEINDEX is the variable that identifies all the unique files. The 8m mosaic set contains about 1500 files with a total size of 1 terabyte in zipped format. The Reference Elevation Model of Antarctica (REMA) is an elevation (DSM) model at 8-meter spatial resolution. Iterating through our file (CSV in this case), for each unique sheet name, we can now construct the download URL. Below you see the download URL for the 0.5 meter resolution Digital Surface Model (DSM) in raster format. It is available in point cloud and raster files. Let's take a look at a couple of URL examples.ĪHN3 is an elevation dataset from the Netherlands. When this happens, I copy the link address (right mouse click on the download link to make this option available). Sometimes I cannot see what the download URL looks like, because as soon as I click on the link, a download is initiated. I always start by downloading a single file manually in order to determine the download URL. These files can come in many shapes or forms, as long as the file contains a text element with a unique identifier for the file you want to download. The Python script consists of two major steps:īy far the most difficult step is to create the URLs from a list or file you can iterate through. So if you're not into geography, no worries, this method might also be for you. I often use Wget to download geospatial information, but you can download anything that is made available for download. With Wget you can mirror entire web or FTP sites, but in this case we use it to download numerous relatively large files. All are freely available and work on both Linux and Windows operating systems. This method requires Python, WGet and a code editor. But there is a way that allows you to just sit back and relax while all your files are downloaded automatically. Unfortunately, up to now I have not come across the buttons that say: "click here to download the complete dataset". Data is often offered in a way where you need to click every file manually in order to download it. These satellites are continuously capturing satellite imagery of the earth's surface and these are made available from multiple platforms.Įven though data is publicly available, downloading the data is not always as straightforward as I had hoped. On a more global level you will be able to find elevation datasets such as the Shuttle Radar Topography Mission (SRTM), the topographic OpenStreetMap data and satellite data captured by satellites like Landsat and the Sentinels. Depending on where you live, your national geospatial data portal might give you access to large amounts of the highest quality geospatial data available. These days there is so much geospatial data publicly available.
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