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= Contourmerge Plugin =

[[Image(/pluginicon/contourmerge.jar/images/mapmode/contourmerge.png,48,link=,middle,margin-right=20)]] The `contourmerge` plugin helps you to align the contours of areas in JOSM.

== Usage ==
**Step 1 - Select the "cut-nodes"**:
* Enable mode, you will need to select (**at least**) two points for every area; but not [#Usagewithways on ways] - there no requirement in minimal node count for ways that are not areas;
* Use left mouse click to select point (icon: standard icon add node will appear); use left mouse click to deselect a point (icon with cross will indicate selected point);
* After all 2+ points selected, you can pick one of 2+ ''parts'' as ''source geometry'' to move. Hover a mouse over one ''part'' and cursor will be changed to (cursor: move with 4 arrows);
**Step 2 - Drag the source contour**:
* After you started to drag ''source geometry'', you have options in target geometry. Your ''source geometry'' will change it's shape to a ''target geometry'' shape after mouse hover and ''shortcut icon'' will be displayed;
**Step 3 - make adjustments and continue editing as usual**:
* Contours will be merged. But if a ''source geometry'' had only one segment left, it will be completely collapsed;
* You can repeat steps 2-3 as many times as you want until tool will disabled or there nothing left to merge

=== Usage on areas ===
* Regular usage:
[[Image(ex1-merge-contour-with-another-countour-usage-on-areas.gif,nolink)]]
* Complete collapse of the source geometry:
[[Image(ex3-merge-contour-with-another-countour-usage-on-areas.gif,nolink)]]

=== Usage with ways ===#Usagewithways
Notes on source:
* tags on a way will be kept
* tags on nodes will be discarded
* geometry will be replaced

Notes on target:
* nothing is changed

* No cut points selected (because both objects are ways, not area):

[[Image(ex2-merge-contour-with-another-countour-usage-on-ways.gif,nolink)]]

* multiple source geometries:
[[Image(ex4-merge-contour-with-another-countour-usage-on-areas.gif,nolink)]]

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