You can get the most recent free satellite images from Landsat 7, Landsat 8, Sentinel-1, Sentinel-2, CBERS-4, MODIS, aerial data from NAIP, or historical satellite imagery from Landsat 4 and Landsat 5. EOSDA LandViewer offers miscellaneous global satellite images. EOSDA LandViewer: Free Access To Satellite ImagesĮOSDA LandViewer is a GIS database with an easy-to-master interface that gives free access to the most widely used open-data satellite images, offers free previews of high-resolution satellite imagery, allowing you to select and order only the ones you require, and features extensive analytic tools. So be prepared that your first search for the required satellite data can be quite time-consuming. It may take a while to familiarize yourself with all the buttons, menu options, and datasets available on the provider’s platform. If you want to analyze the retrieved satellite data, you will need special software.ĮarthExplorer is an undisputed leader among free satellite imagery providers in terms of data variety, but it is not the most user-friendly, especially for a non-expert. The provider’s interface can be used for search, preview, and free GIS data download purposes only. Depending on the sensor, various free data products can be downloaded (Level 1-3, natural color and thermal imagery, etc.).Īnalysis. For downloading large amounts of the USGS’s free satellite images of Earth at once, you will need to install the Bulk Download Application. For free, you can find all possible features, even less common ones - like ancient roads or graves - anywhere in the world.ĭownload. On top of the standard Area of Interest (AOI) selection options (address, coordinates, file upload, or drawing), the provider’s interface offers a feature-based search, which is pretty fun to test. All the found tiles can be conveniently previewed one by one or all at once. The provider allows you to narrow down the search for free satellite imagery by area, date, and cloud cover percentage. The provider also features free datasets provided in collaboration with ISRO (Resourcesat-1 and 2), ESA (Sentinel-2), and some commercial high-resolution satellite images (IKONOS-2, OrbView-3, historical SPOT data). Using this provider, you will find 40 years’ worth of free satellite images from USGS-NASA Landsat missions and a diversity of data from other NASA remote sensors (Terra and Aqua MODIS, ASTER, VIIRS, etc.). The selection of free satellite imagery in EarthExplorer is overwhelming, from optical and radar data to weather satellite photos to digital elevation maps. The USGS agency has the longest record of collecting free GIS data (free satellite images, aerial, and UAV), which is made available via EarthExplorer (EE). Hide USGS EarthExplorer: Free-To-Use Satellite Imagery Making the Most of Free Imagery Providers.Zoom pan around to confirm you have what you expected. Select the image layer to view your new satellite imagery, zoom in to see firstly, your 14 level zoom. You will see a red box outlining the satellite images. If the directory is not already there, click scan charts and update database, click apply and vain. Now start OpenCPN go to options and main chats. Leave everything else on the defaults and click start the export. Check the zoom levels you used previously. Go to the save to box and choose the directory where you store your charts. This is a high resolution geo referenced database that open CPN can read, go to operations, selection manager and select last selection. Now, we need to export this cashed image as an MBTile file. Make sure your map overlay is set to the imagery you chose in this case. DOWNLOAD THE DATA Now with selection manager, open on the download tab, select zoom levels, 14 and 18. Click the battery of the area of interest and click the green checkbox to finish. Now I go to operations selection manager and select polygonal selection. For general scale viewing 14 works pretty well. I find 18 is about the limit for satellite imagery, zoom out and choose a broader zoom level. FIND THE ZOOM LIMIT The zoom limit is shown in the bottom left hand corner. Move to your area of interest and choose what imagery gives you the best detail zoom in and find the limit where no more detail is offered. Linking to Google maps, Google satellite images, satellite images from Bing sonar charts from Navionics and many more. SAS planet has done all the work for you. Double click the icon to open and scroll through the list of imagery available. Copy the executable and send to your desktop. Find the file and downloads, right click and extract to your root directory. Now go to SAS Planet in the link provided and download the zip file. Many thanks to all the contributors for creating these open source tools.įirstly, install open CPN. And, you can copy the text summary to use as a reference.
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