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= Tools > Orthogonalize Shape =

[[JOSMImage(ortho,link=,48,margin-right=20)]] ''Keyboard shortcut:'' **`Q`**

**Move nodes that all angles are 90 or 180 degrees.**

With one or more ways selected, the form will be modified so that all angles will be 90 or 180 degrees.

[[JOSMImage(misc/error,24,middle,link=,margin-right=5,margin-bottom=5)]] **Be careful when using this feature e.g. on buildings. A lot of buildings are indeed not orthogonal in reality.**

== Simple use case ==
Select each way separately or several ways together and hit `Q`. This will orthogonalize each single way on its own. Ways with minimum two sharing nodes which are selected together will be orthogonalized together, too.

[[Image(q-simple.gif,link=)]]

== Using two nodes for alignment ==
You can select two additional nodes. Then segments will be aligned in accordance with these nodes.

[[Image(q-align.gif,link=)]]

== Complex buildings == 
* temporarily split buildings with `P` [wikitr:/Help/Action/SplitWay Split Way]
* orthogonalize portions of a building as usual
* reconnect parts back with `C` [wikitr:/Help/Action/CombineWay Combine Ways]

[[Image(split-q-then-combine.gif,link=)]]

To orthogonalize a part of a building without splitting it, simply select the wanted nodes. Note that the selection order of the nodes does matter here, so selecting e.g. via rectangle will usually not work.

[[Image(q-partial-without-split.gif,link=)]]

== Undo moves of selected nodes ==#Undomovesofselectednodes
Select nodes you want to undo, then press `Shift+Q` and selected nodes will be placed back to origin.

[[Image(shift-q.gif,link=)]]

== Orthogonalization is not Rotation ==
Before (note small extrusion, multiple times smaller than other part):

[[Image(Orthogonalization is not Rotation - before - cropped.png,link=)]]

After Orthogonalization ([https://knowledge.autodesk.com/support/autocad/getting-started/caas/CloudHelp/cloudhelp/2016/ENU/AutoCAD-Core/files/GUID-9810D35D-E975-49E2-88EA-51FE4ACC92DB-htm.html dimensions]/length is not preserved):

[[Image(Orthogonalization is not Rotation - after - cropped.png,link=)]]

For rotation see [wikitr:/Help/Action/Select#Rotate Rotate].

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Attachments (10)

q-align.gif (113.7 KB ) - added by openstreetmap.org-user-d1g 9 years ago. https://github.com/mapbox/mapping/wiki/Mapping%20Common%20Features#buildings https://github.com/mapbox/mapping/issues/162
split-q-then-combine.gif (109.0 KB ) - added by openstreetmap.org-user-d1g 9 years ago. https://github.com/mapbox/mapping/wiki/Mapping%20Common%20Features#buildings https://github.com/mapbox/mapping/issues/162
Orthogonalization is not Rotation.osm (1.0 KB ) - added by openstreetmap.org-user-d1g 8 years ago.
Orthogonalization is not Rotation - before.png (32.0 KB ) - added by openstreetmap.org-user-d1g 8 years ago.
Orthogonalization is not Rotation - after.png (31.2 KB ) - added by openstreetmap.org-user-d1g 8 years ago.
Orthogonalization is not Rotation - before - cropped.png (2.5 KB ) - added by openstreetmap.org-user-d1g 8 years ago.
Orthogonalization is not Rotation - after - cropped.png (1.6 KB ) - added by openstreetmap.org-user-d1g 8 years ago.
q-simple.gif (287.1 KB ) - added by Klumbumbus 7 years ago.
shift-q.gif (38.3 KB ) - added by Klumbumbus 7 years ago.
q-partial-without-split.gif (68.9 KB ) - added by Klumbumbus 5 years ago.

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