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why does gmapping only return a map with 0 and 100 but no other values?

asked 2016-03-18 02:10:00 -0500

edmond320
61 ●11 ●13 ●15

updated 2016-03-18 02:11:37 -0500

hello everyone

I'm using slam gmapping to produce a map, but I've noticed that the output Occupancy Grid Map(which is broadcast to topic /map) contains only -1,0 and 100 for unknown, free and occupied grids respectively.

I'm wondering is there a way to produce a map with other values say 0.05, 0.37, 0.52 etc. which represent the probability of the grid to be occupied? I've checked out the parameters available for gmapping but could not find a clue about this.If it's not available in gmapping, then how should I do this?

any help will be much appreciated, thank you all!

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answered 2016-03-18 04:33:16 -0500

al-dev
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It seems the GMapping::ScanMatcherMap object contains the probabilities of occupancy all the cells as floating numbers between 0.0 and 1.0 : https://github.com/ros-perception/sla... If you can publish it to a topic you might get what you want.

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Asked: 2016-03-18 02:10:00 -0500

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Last updated: Mar 18 '16

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why does gmapping only return a map with 0 and 100 but no other values?