# the yellow line

**URL:** <https://boards.straightdope.com/t/the-yellow-line/37346>\
**Category:** Factual Questions\
**Created:** [October 18, 2000, 12:54am UTC](https://boards.straightdope.com/t/the-yellow-line/37346 "2000-10-18T00:54:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![turner](https://avatars.discourse-cdn.com/v4/letter/t/22d042/32.png) [@turner](https://boards.straightdope.com/u/turner)\
**Post date:** [October 18, 2000, 12:54am UTC](https://boards.straightdope.com/t/the-yellow-line/37346/1 "2000-10-18T00:54:30Z")

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How do they put the ten yard mark on the TV screen in football games. It doesn’t seem like it’s something as simple as super-impostion. The line seems to change as camera perspective changes and players seem walk “over” it not through it.

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**Author:** ![Arjuna34](https://avatars.discourse-cdn.com/v4/letter/a/eb8c5e/32.png) [@Arjuna34](https://boards.straightdope.com/u/Arjuna34)\
**Post date:** [October 18, 2000, 1:15am UTC](https://boards.straightdope.com/t/the-yellow-line/37346/2 "2000-10-18T01:15:23Z")

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From [http://www.howstuffworks.com](http://www.howstuffworks.com):  
[http://www.howstuffworks.com/question225.htm](http://www.howstuffworks.com/question225.htm)

From the website of the company that makes it:  
[http://www.sportvision.com/loader.asp?level=3&node=first&subnode=info](http://www.sportvision.com/loader.asp?level=3&node=first&subnode=info)

Arjuna34