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map stamp error #75

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crankler opened this issue May 21, 2019 · 0 comments
Open

map stamp error #75

crankler opened this issue May 21, 2019 · 0 comments

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@crankler
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crankler commented May 21, 2019

When I use gmapping for save my map , I can alway see the error in tf,
so I check my tf tree, it's right, but when I run rosrun tf tf_echo /map /base_link,
there show

Failure at 1558399180.795866256
Exception thrown:Lookup would require extrapolation into the past. Requested time 40.363000000 but the earliest data is at time 1558399175.095931223, when looking up transform from frame [base_link] to frame [map]

so I echo map and base_link and find that map's stamp is:

header:
seq: 0
stamp:
secs: 1558398434
nsecs: 917620709
frame_id: "map"

But my odom and base_link and other link are all transfome to secs, just as follow:

header:
seq: 1865
stamp:
secs: 37
nsecs: 657000000
frame_id: "odom"
child_frame_id: "base_link"

So how can I do , can you give me some advice?
Thank you for your help!

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