Obtaining satellite images is a relatively straightforward process. Generally the images are acquired from a satellite imaging provider such as DigitalGlobe or Planet Labs. The images can be purchased directly from the provider or through a reseller. Once the images have been purchased they can be downloaded from the providers web-based ordering system.
Many satellite images are also available for free from government agencies such as the U.S. Geological Survey (USGS). The USGS provides satellite images from the Landsat program which is a joint effort between the USGS and NASA. Landsat images can be accessed through the USGSs EarthExplorer website which provides a searchable database of satellite images.
Satellite images are obtained through remote sensing, which involves the use of satellites or other aerial platforms to capture images of the Earth's surface from space. Here are the general steps involved in acquiring satellite images:
Satellite Systems: Satellite imagery is captured by Earth observation satellites orbiting the Earth. These satellites are equipped with sensors, such as cameras or multispectral scanners, capable of capturing images of the Earth's surface.
Image Acquisition: Satellites capture images by scanning the Earth's surface in a systematic manner. The sensors detect and record the reflected or emitted energy from the Earth in various wavelengths, including visible, infrared, and microwave.
Data Transmission: Once the images are captured, they are transmitted to ground receiving stations or processing centers via radio waves or other communication methods. These stations can be operated by government agencies, research institutions, or private companies.
Image Processing: The received satellite data goes through various processing steps to enhance the image quality, correct for distortions, and convert the raw data into usable images. This process involves applying corrections for atmospheric effects, geometric distortions, and calibration.
Distribution: Processed satellite images are then distributed to users through various channels, such as online platforms, commercial providers, or government agencies. Users can access and download the images for analysis, research, or other applications.
It's worth noting that different satellites have different capabilities and resolutions, which can affect the quality and level of detail in the images they capture. Additionally, satellite imagery may be subject to certain restrictions or licensing requirements depending on the provider and the purpose of use.
Binary images, Indexed images, Grayscale images, True color images
There are raster images and vector images.
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No. Raster images define images with pixels. But Vector images paint the pixels on your screen!
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