Frame a place
Choose a place or enter coordinates, then frame the area on the map.
NASA HLS · 30 m source pixels
Compare satellite images. Make change visible.
Two dates, one shared view. Turn regional changes into a clear, labelled image for your next article or lesson.
Satellite CompareHLS S30
01 — See how it works
Three steps to a clearer comparison
Satellite Compare helps you choose two NASA HLS satellite views of the same place and put them into one useful picture. Check available dates, inspect clouds and gaps, add a title or markers, then export with source information included. The 30 m imagery is suited to landscapes, reservoirs and large urban patterns.
Choose available dates
Find available images around two dates. Select the same product and inspect the actual data dates and coverage.
Label and export
Compare, add a title or markers, and export a labelled PNG or JPG. Share the view with a link.
02 — Made for a story worth explaining
Made for a story worth explaining
Satellite Compare helps you choose two NASA HLS satellite views of the same place and put them into one useful picture. Check available dates, inspect clouds and gaps, add a title or markers, then export with source information included. The 30 m imagery is suited to landscapes, reservoirs and large urban patterns.
03 — Guides
Practical guides for clearer comparisons
01
Your first satellite comparison
Frame a place, choose two verified dates and make a labelled comparison using the Lake Mead example.
Read guide 02Choose dates that are fair to compare
Reduce seasonal and sensor differences when choosing satellite dates, and understand what a daily data date can prove.
Read guide 03Understand clouds and missing imagery
Tell catalogue cloud estimates, missing pixels and service failures apart before using a satellite comparison.
Read guideQuestions before you begin
Can I choose any date?
You can search around a date, but a usable observation is not guaranteed. Select a date listed in the NASA catalogue. We check the imagery service's date range and show gaps instead of silently changing dates.
Does a low cloud percentage mean a clear picture?
No. The cloud percentage describes a whole catalogue granule, which can be larger than your view. Check both images for clouds, haze, shadows and missing areas before comparing them.
Can I see changes to an individual house?
HLS source pixels cover about 30 m on the ground. Use this tool for regional patterns. Increasing the exported image size cannot reveal smaller objects.
What is included in the download?
A PNG or JPG containing both views, their UTC data dates, source information and your labels. It is a visual illustration, not the original georeferenced data or a scientific change measurement.
Do my searches stay on my device?
Map and imagery requests go to NASA services. When configured, place searches go to Geoapify. These providers receive request information such as the area or search text. Image composition happens in your browser.
What does the displayed date mean?
It is the UTC date of the daily imagery product. Catalogue acquisition times provide additional context. Daily imagery can combine granules; this tool does not establish the exact acquisition time of every pixel.
Your satellite comparison
Choose one area and two available dates. Inspect both images, then export with their sources.
Start a comparison