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I found the reason for my localization error. Even if i increased my "particle" value to a number of 100, localization is still wrongly estimated. But if I decrease my resolution to 0.01 (e.g. 1 cm grid size), the localization works perfectly and the estimation error (occurs very rarely) is in the range of 2-4 cm.

So maybe that may help you ...

Here is my actual configuration:

<node pkg="gmapping" type="slam_gmapping" name="slam_gmapping" output="screen">
<param name="base_frame" value="base_footprint"/>
<param name="odom_frame" value="odom"/>
<param name="map_update_interval" value="0.5"/>
<param name="maxUrange" value="16.0"/>
<param name="sigma" value="0.05"/>
<param name="kernelSize" value="1"/>
<param name="lstep" value="0.05"/>
<param name="astep" value="0.05"/>
<param name="iterations" value="5"/>
<param name="lsigma" value="0.075"/>
<param name="ogain" value="3.0"/>
<param name="lskip" value="0"/>
<param name="srr" value="0.01"/>
<param name="srt" value="0.02"/>
<param name="str" value="0.01"/>
<param name="stt" value="0.02"/>
<param name="linearUpdate" value="0.01"/>
<param name="angularUpdate" value="0.01"/>
<param name="temporalUpdate" value="-1.0"/>
<param name="resampleThreshold" value="0.5"/>
<param name="particles" value="10"/>

<param name="xmin" value="-4.0"/>
<param name="ymin" value="-4.0"/>
<param name="xmax" value="4.0"/>
<param name="ymax" value="4.0"/>

<param name="delta" value="0.01"/>
<param name="llsamplerange" value="0.01"/>
<param name="llsamplestep" value="0.01"/>
<param name="lasamplerange" value="0.005"/>
<param name="lasamplestep" value="0.005"/>
<remap from="scan" to="$(arg scan_topic)"/>
</node>

BR, Daniel