IGIS Tech Notes describe workflows and techniques for using geospatial science and technologies in research and extension. They are works in progress, and we welcome feedback and comments below.

On July 3, 2025, at 3:54 pm ET, the Earth will officially reach its furthest point from the Sun for this year. This is called aphelion.

A photo capturing the true scale of the distance between the Earth and the Moon has blown people's minds. A viral Reddit post has reminded us once again just how tiny and ultimately insignificant our ...

The cosine similarity distinguishes the difference more from the direction, it is impossible to measure the difference of the value in each dimension, while the kernel tensor can represent the ...

Fresh advances in 3D scanning technology are making it possible to explore some of the hardest-to-reach and most fragile sites on Earth.

Use Street View in Google Maps to see how various places looked like in past years.

The Global Ecosystems Atlas is a tool that aims to serve as an open-source repository for data on all the ecosystems in the world. Developed by the intergovernmental initiative Group on Earth ...

A newly-deployed satellite has created the most-detailed map yet of the ocean floor, finding hundreds of hills and underwater volcanoes that were previously missed.

The distance between Big Ben in London (51.5007° N, 0.1246° W) and The Statue of Liberty in New York (40.6892° N, 74.0445° W) is 5574.8 km. This is not the exact measurement because the formula ...

Spread the loveCalculating the distance between two points is a fundamental concept in mathematics, often applied in various fields such as geometry, physics, and engineering. Understanding how to ...

Python script to compute Fourier Shell Correlation curve between two half-3D density maps - mpopara/FourierShellCorr ...