Introduction
USGS EarthExplorer is a powerful, free online platform for finding, viewing, and downloading satellite imagery, aerial photographs, elevation data, and other Earth observation datasets. Developed by the U.S. Geological Survey (USGS), EarthExplorer gives researchers, students, GIS professionals, environmental scientists, and other users access to a wide range of geospatial data from different locations and time periods.
Whether you need Landsat satellite imagery, historical aerial photographs, digital elevation models, or other remote-sensing datasets, USGS EarthExplorer makes it possible to search for data by location, date, dataset, and geographic area. Users can preview available scenes and download suitable datasets for mapping, research, environmental monitoring, land-use analysis, and GIS projects.
In this guide, you’ll learn what USGS EarthExplorer is, how to use it, how to search for satellite imagery, which datasets are available, and how to download Earth observation data. We’ll also cover practical tips for finding the right imagery quickly and using EarthExplorer effectively for GIS and remote-sensing projects.
What Is USGS EarthExplorer?
USGS EarthExplorer is a free online platform developed by the United States Geological Survey that gives you access to one of the largest archives of satellite imagery, aerial photography, elevation data, and remote sensing datasets in the world. You can search, preview, and download geospatial data covering virtually every corner of the Earth, spanning decades of historical imagery.
Whether you are a GIS professional, a researcher, a student, or just someone curious about how your neighborhood looked thirty years ago, EarthExplorer puts an extraordinary library of earth observation data right at your fingertips. It hosts collections from Landsat missions, commercial satellite providers, aerial survey programs, and radar datasets, all in one searchable interface.
This article covers everything you need to know: what EarthExplorer is, how to use it step by step, how to download images, how to find Landsat data specifically, and answers to the most common questions people ask about the platform. By the time you finish reading, you will know exactly how to get started.
Is USGS EarthExplorer Free?
Yes, USGS EarthExplorer is completely free to use. The platform is funded by the United States Geological Survey, a federal science agency, which means all of its core data collections are publicly available at no cost. You do not need to pay a subscription fee or purchase credits to access the vast majority of its datasets.
There is one small requirement. You need to create a free USGS account to download data. Browsing and searching the archive does not require a login, but downloading any files does. Registration takes only a few minutes and asks for basic information like your name, email address, and how you plan to use the data.
Some specialty commercial datasets hosted within EarthExplorer do carry a cost, but the flagship collections including all Landsat imagery are entirely free. For most users, the free data is more than enough to do serious work.
How Do I Use USGS EarthExplorer?
Using EarthExplorer for the first time can feel a little overwhelming. The interface packs a lot of functionality into one screen. Once you understand the basic workflow, though, it becomes very intuitive. Here is how to navigate it from start to finish.
Step 1: Create Your Free USGS Account
Before you download anything, you need a free account. Go to the EarthExplorer website and click the login button in the upper right corner. From there, select the option to create a new account. Fill in your details, verify your email, and you are ready.
Step 2: Define Your Search Area
When you open EarthExplorer, you will see a world map on the right side of the screen and a search panel on the left. You have several ways to define the area you want to search:
- Use the map directly. Click and drag to navigate, then use the polygon or point tools to draw your area of interest on the map.
- Enter coordinates manually. If you know the latitude and longitude of your location, type them into the coordinate fields in the search panel.
- Search by address or place name. Type a city, region, or landmark into the address search box to jump to that location automatically.
- Upload a shapefile or KML. If you are working in GIS and already have a boundary file, you can upload it directly to define your search area.
Step 3: Set Your Date Range
Just below the area selection tools, you will find date range fields. Enter the start and end dates for the period of imagery you want. If you are looking for the most recent data available, set the end date to today. If you want historical imagery, narrow the range to the specific years or months you need.
Step 4: Choose Your Dataset
This is the most important step. Click the “Data Sets” tab in the left panel. You will see a tree of dataset categories. Common categories include: source: UNESCO
- Landsat satellite imagery
- Sentinel satellite data
- Aerial photography collections
- Elevation and radar datasets
- Commercial satellite imagery
Expand each category by clicking the arrow next to it. Check the box next to the dataset you want to search. You can select multiple datasets at once.
Step 5: Apply Additional Filters
Click the “Additional Criteria” tab to narrow your results further. For satellite imagery, the most useful filter is cloud cover. Set a maximum cloud cover percentage, such as 10 percent, to avoid images where clouds block your area of interest. You can also filter by specific sensors or data quality levels depending on the dataset.
Step 6: Run Your Search
Click the large “Results” button at the bottom of the left panel. EarthExplorer will return a list of scenes matching your criteria. Each result shows a thumbnail preview, the acquisition date, the cloud cover percentage, and a scene identifier. You can hover over results to see the footprint of each image highlighted on the map.
How Do I Download Images from EarthExplorer?
Downloading is straightforward once you find the images you want. Here is the process:
- Log in to your USGS account. You cannot download without being logged in.
- Run your search using the steps above.
- Browse your results. Click the thumbnail to preview a larger version of any scene.
- Add scenes to your bulk download list. Click the shopping cart icon or the download icon next to each result you want.
- Open the download options. Click the download icon and you will see a list of available file formats and resolution options. Landsat data, for example, is available in GeoTIFF format at full resolution.
- Select your product. Choose the file type that fits your needs. GeoTIFF is the standard choice for use in GIS software like QGIS or ArcGIS.
- Download directly or use the Bulk Download Application. For single files, you can download directly in your browser. For multiple files, the USGS Bulk Download Application makes the process much faster and more reliable.
I always recommend using the Bulk Download Application when grabbing more than two or three scenes. It manages the queue automatically and resumes if your connection drops.
How Do I Find Landsat Images in EarthExplorer?
Landsat is the most popular dataset on the platform, and for good reason. The Landsat program has been capturing satellite imagery of Earth’s surface since 1972, making it the longest continuous record of land observation from space. Here is how to find Landsat data specifically.
Navigating to the Landsat Dataset
- Define your search area and date range as described above. viewflare
- Click the “Data Sets” tab.
- Expand the “Landsat” category. You will see several subcategories representing different missions: Landsat 1 through 5, Landsat 7, Landsat 8, and Landsat 9.
- For the most current and highest quality data, select “Landsat Collection 2 Level 2” under Landsat 8 or Landsat 9. Collection 2 data includes atmospheric correction, which makes it ready for most analysis tasks without additional preprocessing.
- Check the box next to your chosen dataset and run the search.
Understanding Landsat Scene Results
Each Landsat result represents a single scene covering roughly 170 by 183 kilometers. The scene ID tells you the path and row (the orbital grid location), the satellite number, and the acquisition date. Pay attention to the cloud cover percentage. For land cover analysis or change detection, aim for scenes with less than 10 percent cloud cover.
Landsat data comes in multiple bands including visible light, near infrared, shortwave infrared, and thermal. This multispectral capability is what makes Landsat so valuable for remote sensing applications like vegetation analysis, water body mapping, urban growth monitoring, and agricultural assessment.
Tips for Getting the Most Out of EarthExplorer
A few practical tips that will save you time and frustration: source: Freie Universität Berlin
- Be specific with your date range. Broad date ranges return huge result sets. Narrow it down to the season or year you actually need.
- Use the cloud cover filter aggressively. Even 20 percent cloud cover can ruin an image for analysis. Set it to 10 percent or less whenever possible.
- Preview before you download. Always click the thumbnail to check the image quality before committing to a download, especially for large files.
- Understand file sizes. A single Landsat scene at full resolution can be several gigabytes. Make sure you have adequate storage before downloading large collections.
- Check data collection frequency. Landsat 8 and 9 together revisit the same location every eight days. If your target date has cloud cover, try searching eight days earlier or later.
Conclusion
USGS EarthExplorer is one of the most powerful and underused tools available to anyone working with geographic data. It gives you free access to decades of satellite imagery, aerial photography, elevation data, and remote sensing collections that would cost thousands of dollars elsewhere. Learning to navigate the platform takes a little patience, but the payoff is enormous.
Whether you are tracking land use change, studying natural disasters, conducting environmental research, or simply exploring what your region looked like in 1985, EarthExplorer has the data you need. The entire archive is free, the account setup takes minutes, and the download process is straightforward once you know the steps.
Have you tried using EarthExplorer for a project? What kind of data are you looking for? Drop your experience in the comments or share this guide with someone who could put this incredible tool to work.
Frequently Asked Questions
1. Do I need to pay to use USGS EarthExplorer? No. The platform is free to use and most datasets including all Landsat imagery are available at no cost. A free account is required to download files.
2. What types of data are available on EarthExplorer? EarthExplorer hosts satellite imagery, aerial photography, elevation data, radar datasets, and commercial satellite collections. The archive spans from the early 1970s to the present day.
3. Can I use EarthExplorer data for commercial projects? Yes. Most USGS data is in the public domain and can be used for commercial purposes. Always check the specific dataset license to confirm before using it in a commercial product.
4. What file formats does EarthExplorer provide? The most common format is GeoTIFF, which is compatible with most GIS software including QGIS, ArcGIS, and ERDAS. Some datasets are also available as compressed archives containing multiple band files.
5. How current is the imagery on EarthExplorer? Landsat 8 and Landsat 9 imagery is typically available within a few days of acquisition. The archive is updated continuously as new scenes are collected and processed.
6. Can I search EarthExplorer without an account? Yes. You can browse, search, and preview imagery without logging in. An account is only required when you want to download data.
7. What is the best Landsat dataset for beginners? Landsat Collection 2 Level 2 from Landsat 8 or Landsat 9 is the best starting point. It is atmospherically corrected, well-documented, and widely supported by analysis tools.
8. How do I open EarthExplorer data in QGIS? Download the GeoTIFF files from EarthExplorer and drag them directly into QGIS. Each band is a separate file. You can combine bands into a false color or true color composite using the raster layer styling options.
9. What is the spatial resolution of Landsat imagery? Landsat 8 and 9 capture imagery at 30 meters per pixel for multispectral bands and 15 meters per pixel for the panchromatic band. Thermal bands are captured at 100 meters.
10. Can EarthExplorer be used on a mobile device? The website works on mobile browsers but the interface is designed for desktop use. For serious data searching and downloading, a desktop or laptop with a stable internet connection is strongly recommended.
Author Bio: Marcus Webb is a geospatial analyst and science writer with more than a decade of experience working with satellite imagery and GIS platforms. He has used USGS EarthExplorer extensively for environmental research and remote sensing projects, and enjoys making complex geospatial tools accessible to beginners and professionals alike.
email: johanharwen@314gmail.com
Author Name: Marcus Webb
