What Is Series

The [W]hat [I]s series by SkyWatch
explains common terms used 
in the geospatial industry. 

What is open data?

Read Watch What is open data? Open Data refers to data that organizations provide at no charge, and often with very permissive licensing. An example

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What is SAR?

What is SAR?

Synthetic Aperture Radar (SAR) is a specific satellite that can capture imagery in all weather conditions, day or night. SAR sends a microwave radar signal to the earth’s surface to detect physical properties.

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What are indices?

What are indices?

Indices are calculated using the multispectral bands. These calculations result in the outputs being in the form of an index with values between 0-1. At the same time, the indices provide additional information about the ground surface being imaged.

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What are multispectral outputs?

What Are Multispectral Outputs?

Multispectral outputs are made up of bands within the multispectral spectral ranges. The different options include true colour, false colour urban, false colour infrared, and all optical bands.

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what is an image output?

What Is Image Output?

Image output is about determining the color or bands and indices you want to obtain in order to gain valuable information about your AOI.

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What is archive?

What Is Archive?

Using a console like EarthCache, archive satellite imagery is a purchasing option for imagery that has already been collected. Archive imagery can be passively collected by satellites that constantly collect over the earth.

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tasking

What Is Tasking?

Tasking is the act of “ordering” new satellite imagery from a specific satellite. To task a satellite, coordinates of an area of interest (AOI), time frame and interval are sent to the satellite provider.

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Latency

What Is Latency?

For satellite data, latency refers to the time between satellite observation and the time data is available to users.

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temporal resolution

What Is Temporal Resolution?

Temporal resolution, also known as re-visit rates, vary from different providers. Temporal resolution provides information on the time difference between the acquisitions of two images over the same area.

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What is spatial

What Is Spatial Resolution?

Resolution refers to the spatial resolution a data product has. Spatial resolution can be defined as the amount of data on the ground a single image pixel represents.

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very high resolution

What Is Very High Resolution?

Very high resolution (VHR) refers to the spatial resolution size of a satellite image. In simple terms, the resolution type will determine the clarity of your optical image.

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high resolution

What Is High Resolution?

High resolution refers to the spatial resolution size of a satellite image. In simple terms, the resolution type will determine the clarity of your optical image.

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what is medium resolution

What Is Medium Resolution?

Medium resolution refers to the spatial resolution size of a satellite image. In simple terms, the resolution type will determine the clarity of your optical image.

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low resolution

What Is Low Resolution?

Medium resolution refers to the spatial resolution size of a satellite image. In simple terms, the resolution type will determine the clarity of your optical image.

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what is earthcache

What Is EarthCache?

EarthCache is a satellite imagery marketplace and API. It connects customers to one of the largest marketplaces of satellite data providers in the world.

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mosaicking

What Is Mosaicking?

In a marketplace console like EarthCache, Mosaicking is an optional setting that allows for multiple images from the same satellite sensor to be mosaicked (aka "stitched") together.

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