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Sythus (으)로 부터 도착한메세지 - English

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exercise for english class, pls help with my bad english :)
So navigation requires the knowledge of the current position in the building.
Without localisation a navigation is not possible.
To localize a person in a building it was necessary to create a coordinate system on the basis of a building plan.
The idea was to spread QR-Codes in the building and save their position as x- and y-coordinates in them.
So reading a QR-Code automatically provides the position in the building.

SythusJune 2013투표하세요!
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각 문장을 수정해주세요! - English

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- exercise for english class, pls help with my bad english :)
  투표하세요!
- ADD a NEW CORRECTION! - 제목
문장 1
- So navigation requires the knowledge of the current position in the building.
  투표하세요!
- ADD a NEW CORRECTION! - 문장 1
문장 2
- Without localisation a navigation is not possible.
  투표하세요!
- ADD a NEW CORRECTION! - 문장 2
문장 3
- To localize a person in a building it was necessary to create a coordinate system on the basis of a building plan.
  투표하세요!
- ADD a NEW CORRECTION! - 문장 3
문장 4
- The idea was to spread QR-Codes in the building and save their position as x- and y-coordinates in them.
  투표하세요!
- ADD a NEW CORRECTION! - 문장 4
문장 5
- So reading a QR-Code automatically provides the position in the building.
  투표하세요!
- ADD a NEW CORRECTION! - 문장 5