Map Projections Explained - A Beginners Guide

Learn what a map projection is, why they are used and what impact they have on maps GIS systems. We will taker a closer look at the popular Mercator projection and examine how the projection affects area and distance calculations.

0:00 Beginner's guide to map projections
0:37 What is a map projection?
2:24 The Web Mercator projection
2:58 Distortion in the Web Mercator projection
3:54 The size of Greenland in Web Mercator vs actual
4:21 So what? What impact does this distortion have on me?

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Hosted by: Chris Brown

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[gracekaba]

I have a test in an hour...this has been really helpful

[Turnip]

Not only a beginners guide, I explained projection to my friend and googled, this was the first result and it did not disapont, the visuals are amazing I also got a new grasp of prespective

[TheLoganatorz]

First 4 words said in this video made my day

[mohammedalmazrouei]

just wanted you to know that your my homework for this week :)

[vibhupande]

hey, a great introductory video! wanted more, but don't see any more educational content uploaded since. so many requests down in the comments, pls find time, because your wisdom and style is wonderful.

[ankitrana]

Thanks Buddy it will help in my today's geo practical

[maxinesun]

Well explained, now I understand a bit better.

[crucialaccount]

Thanks so much! I understand map projections much better.

[adedipepaul]

I've always thought Russia, Canada, Greenland and other "polar" locations were actually bigger
Now i know better 👏🏾

[shadow]

Very nice video, thanks for the info !

[tanyamatveeva]

Great job, thanks!
but Google did not create Mercator projection, of course :)

[BusetBali]

This is great content...and I like to make a video like this

[effbeeess]

very simply and playfully taught a very difficult subject

[cozynblue]

Global Business Class, ugh. Thanks for making maps explainable.

[DemonCactus]

how about the south part ? did you measure the south polar region ?

[TylerSimonds]

Google originally created the Mercator projection? Lol. I guess you probably meant the Web Mercator projection.

[TheSmoothToad]

How often do you still post im a wind energy major who is taking GIS ArcMap

[erealify]

whats orthomorphic projection in a nutshell ?

[DonaldKronos]

Good video, but I would like to point out an error, or at least an apparent error. It is not correct to say that a map projection is the process of transforming a spherical object into a two-dimensional flat surface. The process of map projecting is more general than that and does not require that the source object be spherical nor that the destination surface must be flat or two-dimensional. In fact, it is possible to project the three-dimensional surface of a hypercube onto the three-dimensional surface of a hypersphere. Yes, there was a qualifier added of "as you can see on screen at the moment", which could be taken to mean "in the context of the example shown on screen at the moment" but it seems the implication was that the definition given was not meant to be a restrictive one applicable only to the presented example. A more general definition woud be that a map projection is the result of a methodical process of presenting the features of one surface onto another surface, especially when done in such a way as to maintain some recognizable correlation between the source features and their projected representations.

[josephcoleman]

l use google earth ..its a globe Also on googles marcator map as you scroll away from the equator the scale line increases in lenth