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We want to design a robot web monitor of robot location. We has been built the indoor map through the ros and generate a map picture, the file pf yaml parameters are as follows:

[resolution: 0.050000
origin: [-24.45000, -28.000000, 0.000000]
negate: 0
occupied_thresh: 0.65
free_thresh: 0.196]

, according to the html5 canvas will always show the location on the indoor map. But we do not know how to change ros(map) coordinate system to html5 canvas coordinate system. Hope that experienced people can give me some ideas or algorithms, thank you.

how to change ros(map) coordinate system to html5 canvas coordinate system We want to design a robot web monitor of robo