Difference between Very High Resolution, High Resolution, Medium Resolution, and Low-Resolution Satellite Images
�
Very high-resolution satellite images typically have a spatial resolution of 30 cm or less, meaning that each pixel in the image represents a 30 cm x 30 cm area on the ground.
�
High-resolution satellite images have a spatial resolution of 30/50/70 cms, which provides pretty good detail and clarity.
�
Medium-resolution satellite images have a spatial resolution of 1 to 5 meters, which provides less detail than high-resolution imagery, but still allows for larger areas to be viewed in a single image.
�
Higher-resolution satellite imagery provides more detail and clarity, while lower-resolution imagery provides a broader overview of larger areas. The choice of resolution will depend on the specific requirements of the application and the level of detail needed to achieve the desired results.
Types of Satellite Imagery
�
There are several types of satellite imagery that are commonly used for various applications:
�
Optical satellite imagery: Captures images using visible light and infrared sensors, and provides detailed information about the physical features of the Earth's surface, such as buildings, vegetation, and topography.
�
Synthetic Aperture Radar (SAR) imagery: Uses radar to capture images, and provides information about the surface of the Earth regardless of weather conditions or time of day. SAR imagery is particularly useful for mapping, disaster response, and military applications.
�
Multi-spectral imagery: Captures images in multiple different bands of the electromagnetic spectrum, such as visible light, infrared, and ultraviolet, and provides information about different types of vegetation, land use, and water quality.
�
Interferometric Synthetic Aperture Radar (InSAR) imagery: Uses multiple SAR images to measure changes in the Earth's surface, and is commonly used for monitoring and studying geological processes such as earthquakes and volcanic eruptions.
�
Hyperspectral imagery: Captures images in hundreds of narrow spectral bands, and provides information about the chemical composition and properties of the Earth's surface. Hyperspectral imagery is commonly used for environmental monitoring, resource management, and military intelligence.
�
Top Satellite Imagery Providers
�
Maxar: Provides high-resolution satellite imagery: Offers high-resolution imagery with a resolution of up to 30 cm, as well as medium-resolution imagery and large-scale mapping solutions. More details: https://www.geowgs84.com/maxar-satellite-imagery/ Singapore in July 2014, Twenty-First Century Aerospace Technology (Asia) Pte. Ltd. (21AT Asia) is a leading provider imagery services. As a subsidiary of Twenty-First�
Planet: Provides high-resolution imagery with a resolution of up to 3 meters, and operates a large fleet of Earth-observing satellites that can capture images on a daily basis.
�
Airbus Defence and Space: Offers high-resolution imagery with a resolution of up to 50 cm, as well as medium-resolution imagery and large-scale mapping solutions.
�
Satellogic: The company's focus is on providing low-cost, high and medium-resolution satellite imagery. More details https://www.geowgs84.com/satellogic
�
SIIS: Offers imagery with a resolution of up to 50 cm, as well as medium-resolution imagery and large-scale mapping solutions. More details: https://www.geowgs84.com/kompsat-satellite-imagery
�
BlackBridge: Offers imagery with a resolution of up to 50 cm, as well as medium-resolution imagery and large-scale mapping solutions.
NRSC/ISRO:
�
Where can WE buy the satellite imagery:
�
LandInfo
L3Harris Geospatial
GeoCento
Maxar
SkyWatch
Airbus
SatImaging Corp
NRSC/ISRO
THANK YOU