[osmosis-dev] completeRelations flag for --bp/--bb not working

[Frederik Ramm]

Hi,

    consider this test case (run with 0.31.3):

<osm version="0.6">
   <node id="1" version="1" timestamp="2007-10-31T23:48:54Z" uid="1" 
user="fred" changeset="1" lat="53" lon="10"/>
   <node id="2" version="1" timestamp="2008-09-28T17:44:53Z" uid="1" 
user="fred" changeset="1" lat="54" lon="10" />
   <node id="3" version="1" timestamp="2008-09-28T17:44:53Z" uid="1" 
user="fred" changeset="1" lat="55" lon="10" />
   <relation id="1"  version="1" timestamp="2005-07-05T02:14:07Z" 
uid="1" user="fred" changeset="1">
      <member type="node" role="" ref="1" />
      <member type="node" role="" ref="2" />
   </relation>
   <relation id="2"  version="1" timestamp="2005-07-05T02:14:07Z" 
uid="1" user="fred" changeset="1">
      <member type="node" role="" ref="3" />
   </relation>
</osm>

Cutting out from this a bbox that only contains node #1, such as

osmosis --rx test.osm --bb left=1 right=90 top=53.5 bottom=52.5 --wx -

one would expect to find in the output:

* without extra flags: node #1, relation #1 referring to nodes #1,#2

   --> pass

* with clipIncompleteEntities: node #1, relation #1 refering to node #1

   --> pass

* with completeRelations: nodes #1,#2, relation #1 referring to both

   --> fail; instead, you get node #1 only, but relations #1 and #2.

It seems that completeRelations always acts as "copy all relations from 
input to output no matter what" and has no influence on handling nodes 
and ways. Re-writing the same example to use ways, and the trying it 
with completeWays=true, yields the expected result.

The Wiki documentation on completeRelations says:

"Include all available relations which are members of relations which 
have at least one member in the bounding polygon."

This describes neither the behaviour I had expected, nor the behaviour I 
have observed. I believe the intended behaviour is really "Include all 
available *objects* ..."- no?

Bye
Frederik