Map Of Spread Of Christianity

From a sect of Jews to a world dominating religion with over two billion followers, the story of Christianity is fascinating. This animated map gives a geographic await at the past 2,000 years and shows how the religion was spread around the world, first past Jesus's disciples, then by emperors, kings, and missionaries.

It is also interesting to see how all 5 of the biggest religions in the world: Hinduism, Buddhism, Christianity, Judaism, and Islam spread beyond our planet.

The video is a part of a larger Business Insider series. Y'all can find all of these videos here.

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Tanya Knowles 11.fourteen.2021

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John Kimmance 01.21.2022

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Christopher Beddow 06.6.2022

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Understanding and choosing the right map projection can be tricky. For GeoGeeks information technology is painful to see the unconscious overuse of Mercator. If yous desire to change something, start with yourself. These set of tools will let y'all master map projections, their characteristics, compare them and select the correct one for your project.

1. The scale of Mercator project distortions

For starters, information technology's important to fully become the calibration of the problem related to the unconscious use of Mercator projection. This tool called The Truthful Size lets you compare the size of countries by allowing you to movement their shapes around a map. In the case beneath, you can see how the size and shape of the US changes when it's near the equator and the pole.

two. Understand distortions with Gedymin faces

My favorite image describing map projections comes from the volume "Elements of map projection with applications to map and nautical chart structure" written in 1921 by Charles H. Deetz. A similar concept has been further developed in 1950s by a Soviet cartographer named Gedymin who developed an fifty-fifty larger fix of heads used to show in an piece of cake to understand way, distortions caused by map projections.

Ningchuan Xiao from the Ohio State University has applied this technique in this awesome tool where y'all can illustrate the distortions using both Tissot's indicatrix and the Gedymin faces.

three. Analyze key characteristics of each major project

Another great tool lets y'all understand details of some of the fundamental projections out there. Each of the projections is described with name and a couple of parameters:

Acc. forty° 150% – The Acceptance alphabetize is a numerical mensurate that summarizes overall projection distortion, in this case with a maximum angular distortion of forty° and areal distortion of up to 150%.
Calibration – The weighted hateful error for overall scale distortion.
Areal – The weighted mean error for areal baloney.
Angular – The hateful angular deformation index.

In other to go it, have a look at Mercator. You lot can easily say that it's a conformal projection (preserving the angles) every bit angular deformation index is zippo (while the scale and areal deformations are at the maximum).

4. Compare over 200 projections

This website is probably the biggest repository of map projection knowledge that y'all've ever seen. It features over 200 projections and allows you to easily compare them.

Once you select projections, you can overlay them:

and compare their Tissot's indicatrix distortions:

five. Find the best project for your purpose and geography

Finally, there is also a tool chosen Projection Wizzard that was designed to help cartographers select an appropriate projection for their map. Depending on the extent and the baloney holding of the map, the application returns a list of advisable map projections with boosted project parameters if necessary.