Google Maps and Google Earth are very common platforms today to explore maps and satellite images of the earth. But there are many other ways to explore the earth. Some are listed here. 1. Earth Explorer This map is developed by USGS helpful to obtain earth imagery across available geo-spatial data types. Users can navigate via interactive map or text search to obtain Landsat satellite imagery, Radar data, UAS data, digital line graphs, digital elevation model data, aerial photos, Sentinel satellite data, some commercial satellite imagery including IKONOS and OrbView3, land cover data, digital map data from the National Map, and many other datasets. Users can search by exact location via the interactive map or input specific coordinates to view what data types are available. 2. Sentinel Hub This platform developed by Sinergise has Sentinel, Landsat, and other Earth observation imagery easily accessible for browsing, visualization and analysi...
Satellite Resolution (m) Revisit Time Bands Best For Landsat 8/9 15–30 16 days 11 Land cover change, geology Sentinel-2 10–60 5 days 13 Agriculture, vegetation MODIS 250–1000 Daily 36 Climate, global-scale ASTER 15–90 16 days 14 Geology, elevation models PlanetScope 3–5 Daily 4 Local monitoring WorldView 0.31–2 Daily 8–16 High-precision mapping Key Differences in Use: Resolution needed? → Sentinel- 2 > Landsat for detail, WorldView for ultra- fine resolution. Geological mapping? → Landsat, ASTER, Sentinel- 2 ( for alteration zones, structural mapping). Monitoring frequency? → Sentinel- 2 and PlanetScope are better for frequent monitoring. Historical data? → Landsat ( archive since 1972) is unmatched.
