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= Tools > Create a multipolygon =

This tool is used to quickly create a [wikitr:/Help/Concepts/Object#Relations relation], more specificity a valid [wikitr:/Help/Concepts/Object#typemultipolygon multi-polygon].

== a multipolygon with single outer ring and single inner ring ==

 1. Select a relation members that would form:
   a. an outer ring ([wikitr:/Help/Concepts/Object#Ways ways]) - in this demo we will use [wikitr:/Help/Action/SelectNonBranchingWaySequences Select > Non-branching way sequences] to speed up process. 
   a. an inner ring
 2. after all members selected, activate a tool
 3. enter details using [wikitr:/Presets presets], [wikitr:/Help/Dialog/TagsMembership Tags/Membership Dialog] or [wikitr:/Help/Dialog/RelationEditor Relation editor]
 4. This tool creates only valid multi-polygons, but you may '''optionally''' check that new muti-polygon contains no mistakes using [wikitr:/Help/Dialog/Validator validator], as there might be mistakes after human intervention.

A new relation with single [wikitr:/Help/Concepts/Object#Tags tag] {{{type=multipolygon}}} would be created. You can add more details, using tags such as {{{natural=water}}} for water objects and so on.

[[Image(3seg_outer_1seg_inner.gif)]]


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