The best tool depends on whether you need to find data, preview or download it, connect it to GIS software, or analyze it with code. The six options below focus on open Earth-observation data and the STAC ecosystem, where authoritative documentation is available. They are complementary workflows rather than six equivalent data providers.
Quick comparison
| Tool or workflow | Best for | Access style | Technical level |
|---|---|---|---|
| Copernicus Browser | Searching and previewing satellite imagery | Browser portal; downloads and exports | Beginner to intermediate |
| Copernicus Data Space APIs | Automated catalog access, processing and GIS connections | STAC, openEO, Sentinel Hub and OGC services | Intermediate to advanced |
| STAC static catalogs | Browsing a structured collection of linked geospatial assets | Files and web links; no search service required | Intermediate |
| STAC APIs | Searching items by place, time and collection | Queryable web API | Intermediate to advanced |
| QGIS STAC connections | Using online catalogs from desktop GIS | Browser panel or Data Source Manager | Beginner to intermediate |
| Google Earth Engine Data Catalog | Scripted analysis of raster and vector Earth-science data | Cloud scripting environment | Intermediate to advanced |
1. Copernicus Browser
Copernicus Browser is the most accessible starting point when you want to explore satellite imagery in a web browser. It lets you search and visualize Copernicus products before committing to a download.
What you can do
- Define an area of interest (AOI) by drawing it or uploading supported geometry such as GeoJSON or JSON.
- Search and inspect available products, then download a complete product or individual files.
- Export images in multiple formats and create timelapses.
- Use selected statistics and data-exploration features when they are supported by the chosen dataset.
Important limits
Features are dataset-specific. For example, the documentation identifies Spectral Explorer as a Sentinel-2 feature. Check the current Copernicus Browser documentation for supported collections and tools before planning a repeatable workflow.
2. Copernicus Data Space APIs
Copernicus Data Space is a broader access layer for catalog discovery, downloads, visualization and processing. It is useful when a browser interface is not enough or when you need to connect services to software and scripts.
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Available routes
- STAC: structured catalog discovery for items, collections and assets.
- openEO: cloud-hosted Earth-observation processing accessed through programming libraries and related clients.
- Sentinel Hub: programmatic access and visualization services.
- OGC services: standards-based map and data services that compatible GIS clients, including QGIS, can consume.
These are different access methods within the Data Space ecosystem, not separate datasets. Choose the route according to whether you need search, streaming, processing or GIS interoperability.
3. STAC static catalogs
STAC (SpatioTemporal Asset Catalog) is a shared structure for describing and organizing geospatial assets. A static catalog is a set of linked catalog, collection and item files. It can be hosted as ordinary web-accessible data and does not require a search server.
Core concepts
- Item: a single spatiotemporal observation or scene, with metadata and links to assets.
- Collection: related items grouped by dataset or mission.
- Catalog: an index linking collections or items.
- Asset: the actual file or service endpoint, such as an image band or metadata document.
Static catalogs work well when a publisher wants a portable, crawlable structure. They are less convenient when you need interactive filtering across a very large archive.
4. STAC APIs
A STAC API uses the same concepts but adds a searchable service. Instead of manually following catalog links, a client can request items by spatial extent, date range and collection, then inspect footprints, metadata and asset links.
Rank #3
When an API is the better choice
- You need repeated searches for different areas or dates.
- You want to automate discovery in a script or application.
- You need server-side filtering before downloading large files.
- You want a standard interface that can be used by multiple GIS and analysis tools.
STAC itself does not guarantee that every catalog contains the same sensors, geographic coverage, formats or licensing terms. Those details must be checked in each collection and item.
5. QGIS STAC connections
QGIS turns online STAC data into a desktop-GIS workflow. The QGIS 3.44 documentation describes two connection patterns: static catalogs through the Browser panel and STAC APIs through the Data Source Manager.
Rank #4
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Connect to a static catalog
- Open the QGIS Browser panel.
- Add or locate the web-accessible static STAC catalog.
- Expand its collections and items to inspect linked assets.
- Add a compatible asset to the map or open its metadata.
Connect to a STAC API
- Open Data Source Manager and choose the STAC-related source.
- Enter the API endpoint supplied by the data provider.
- Set a spatial extent and date range, then narrow the search by collection where available.
- Review result footprints and metadata.
- Download an asset or add a cloud-optimized format such as COG directly to the map canvas when supported.
QGIS is desktop software, so this is not a browser-only tool. Its advantage is combining online discovery with established GIS editing, styling and analysis tools.
6. Google Earth Engine Data Catalog
Google Earth Engine is a cloud analysis route rather than a simple download portal. Its public catalog contains raster and vector Earth-science datasets that can be imported into scripts for filtering, visualization and computation.
The Tool Desk
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Why use it
- Analyze large collections without downloading every source file locally.
- Combine raster and vector datasets in a reproducible script.
- Build repeatable processing steps instead of manually exporting scenes.
- Upload your own raster or vector data for private use or sharing in scripts.
Catalog availability and access conditions can change, and each dataset has its own metadata and terms. Confirm that the collection you need is currently available before designing a production workflow.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to choose the right tool
Start with the task
- Just need a visual answer or a few images? Start with Copernicus Browser.
- Need repeatable searches? Use a STAC API or the catalog services in Copernicus Data Space.
- Already work in QGIS? Add a static catalog, STAC API or compatible OGC service.
- Need cloud-scale, scripted analysis? Consider Earth Engine or openEO through Copernicus Data Space.
Check these details before committing
- Coverage: Does the collection include your location and required sensor?
- Time range: Are the dates you need available?
- Filtering: Can you filter by geometry, date, collection and, where exposed, cloud conditions?
- Preview: Can you inspect a footprint, thumbnail or metadata record first?
- Access path: Will you download files, stream cloud-hosted assets or process them remotely?
- Formats: Can your software read the offered assets, including formats such as COG where relevant?
- Skill and setup: Is a browser enough, or do you need QGIS, an API client or scripting?
- Licensing: Read the terms for the specific collection or asset; open access does not mean every dataset has identical conditions.
Can you download open geospatial data?
Yes, but the method varies. Copernicus Browser can provide product or file downloads, QGIS can expose downloadable STAC assets, and APIs can return links or subsets. Other workflows stream data or process it in the cloud, which may be more practical than downloading a complete archive. Always inspect the item metadata and collection documentation for format, size and usage terms.
Can you open satellite data in QGIS?
Yes. QGIS can connect to static STAC catalogs and STAC APIs, filter API results by location and date, inspect footprints and metadata, and access assets. It can also consume compatible OGC services. Whether a particular asset opens directly depends on its format and the provider’s service configuration.
Quick Recap
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