hi,

from time to time people encounter errors in routes or destinations can't be 
reached. there are a lot of reasons for this. and a lot of reasons can be found 
in the output of my check programs.

so if you no longer want to do "trial and error" and want to correct the map 
data proactively have a look at the programs and their outputs.

waycheck looks for unconnected endpoints of ways and crossings of ways on the 
same layer where the ways don't share a common node.
http://wiki.openstreetmap.org/wiki/WayCheck

checkconn does the above mentioned check, but faster and with less memory.

checkcross does the above mentioned check, but faster and with less memory.

checktouch checks for endpoints of ways that nearly touch another way. so 
presumably these ways should be connected.

motorwaycheck checks for invalid motorways (invalid oneway tags and possibly 
wrong directions of ways).
http://wiki.openstreetmap.org/wiki/MotorwayCheck

lots of reports can be found here: 
http://wiki.openstreetmap.org/wiki/DE:WayCheck

all programs can also be found on my wiki page: 
http://wiki.openstreetmap.org/wiki/User:Gary68

generally there is a wiki page for quality assurance here: 
http://wiki.openstreetmap.org/wiki/Quality_Assurance


cheers 

gary68
gerhard






      

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