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Temporal and spectral satellite comparison with Grid, Swipe, Timeline, and Opacity visualization modes
Answers to the most common questions about this tool
It lets you compare satellite imagery using 8 layer types (RGB, NDVI, NDWI, NDMI, LST, Night LST, Light Pollution, UTFVI). You can compare the same layer across different years (Temporal mode) or different indices for the same year (Spectral mode). Results are displayed in four interactive views: Grid, Swipe, Timeline, and Opacity.
There are two modes: Temporal and Spectral. In Temporal mode you fix one layer type (e.g., NDVI) and compare it across 2 to 6 different years. In Spectral mode you fix one year and compare 2 to 6 different layer types (e.g., RGB vs. NDVI vs. LST) for the same period. A Scenario mode is planned for future release.
Four views are available. Grid shows all layers side by side with synchronized pan and zoom. Swipe places two layers on the same map with a draggable divider. Timeline animates through years for temporal comparisons. Opacity blends two layers with an adjustable slider. Swipe and Opacity require exactly 2 layers; Timeline is only available in Temporal mode.
Eight types: RGB (true color), NDVI (vegetation health), NDWI (water bodies), NDMI (moisture), LST (daytime land surface temperature), Night LST (nighttime temperature), Light Pollution (nighttime radiance), and UTFVI (urban thermal field variance index). Some types like Night LST, NDMI, UTFVI, and Light Pollution have longer generation times.
Each layer type x year combination costs 0.4 credits. A Temporal comparison with 1 layer across 4 years costs 1.6 credits. A Spectral comparison with 3 indices for 1 year costs 1.2 credits. On signup you receive 10 free credits. Additional packages start from 19.90 EUR.
Without registration you can compare areas up to 100 hectares. With a free account and credits, there is no enforced maximum. Credit cost is based on the number of layers and years selected, not the area size.
Yes. Each completed comparison generates a shareable link. Recipients can view the full visualization, switch between Grid, Swipe, Timeline, and Opacity views, and explore the results at no credit cost.
Satellite imagery is available from 2017 to the current year. You can select any combination of years within this range for temporal comparison.