Sentinel-2 Composites for Any Map View
Satellite images are often cloudy. A composite combines several passes over the same place into one clear image. Draw a box on the map, pick a date range, and this canvas builds a 10 m Sentinel-2 composite you can download as a GeoTIFF.
Try it out
The dashboard opens on a stored composite of New York. Draw your own box and click Run composite to make a new one.
1 · Dashboard
- Area: click Draw box and drag on the map, or use the current view.
- Bands: any three Sentinel-2 bands, with presets for true colour, false colour and SWIR.
- Dates and Settings: the date range, how cloudy an image may be, and how to combine them (
medianby default). - Machines: how many parts of the area run at the same time, up to 200.
When the run finishes, click Download COG to save the image.
2 · Find the images
s2_scenes lists the Sentinel-2 images that cover your box in the date range, least cloudy first:
curl "https://udf.ai/fc_fused/Sentinel2_Composite/s2_scenes/run/file?format=csv&aoi=-74.05,40.68,-73.90,40.82&date_start=2025-06-01&date_end=2025-09-30&max_cloud=10&limit=5"
3 · Build the composite
The box is split into square blocks of about 10 km. Each block runs on its own machine: s2_composite loads the clearest images for that block with odc.stac and takes the median of each pixel over time. That keeps the ground and drops most clouds. Finished blocks are saved, so running the same settings again is instant.
4 · Download
The blocks are then joined into one Cloud-Optimized GeoTIFF (COG), cut to your box. The map shows it at every zoom level, and Download COG saves it.
About the data
| Property | Value |
|---|---|
| Imagery | Sentinel-2 L2A, AWS Open Data |
| Scene catalog | tge-labs s2-stac-geoparquet on Source Cooperative |
| Output | One COG (.tif) per box, about 10 m per pixel |
See also
- Monthly Median Composite: one composite per calendar month, each on its own machine.
- NDVI Time Series for Farm Fields: Sentinel-2 sampled per field as time series.
- STAC catalogs guide: how Fused reads Sentinel-2 scenes through STAC.