About unit in map

asked 2017-09-05 20:55:23 -0500

rozoalex gravatar image

How does the unit in map related to the real world unit? Since I want to modify the map by hand to make it more accurate. I really want to know how is the unit working. For example, how many pixels in the pgm is one meter? I couldn't find relevant document about this.

Thanks!!

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Comments

1

The map resolution (pixels per meter) is typically specified in the yaml file that goes with your map.

ahendrix gravatar imageahendrix ( 2017-09-06 00:42:48 -0500 )edit

Mine says: "resolution: 0.050000". What does it suppose to mean? Thanks!

rozoalex gravatar imagerozoalex ( 2017-09-06 07:12:58 -0500 )edit
1

That means 5cm. Everything in ROS uses SI units or direct derivatives. See REP-103.

gvdhoorn gravatar imagegvdhoorn ( 2017-09-06 07:15:18 -0500 )edit