how many rows and columns does the landsat image have
The images are composed of thousands of pixels that the satellite scanned into rows and columns. The satellite gathers a group of rows into a computer file. This file covers an area of Earth known as a scene. The scene size varies depending on the sensor. Sensors on Landsat, the US satellite series, has scenes about 185 km (115 miles) on each side. The illustration shows a Landsat scene coverage for the San Francisco Bay Area. Scenes for other commonly-used sensors range in size from 60 km to 2200 km. A scene of Landsat can have over 6000 rows and columns of pixels. You usually purchase satellite imagery by the scene. Scenes can cost anywhere from $50 for poorer-resolution, public-domain data to over $5000 for higher-quality scenes.