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= Contourmerge Plugin =

[[Image(/pluginicon/contourmerge.jar/images/mapmode/contourmerge.png,nolink)]] The {{{contourmerge}}} plugin helps you to align the contours of areas in JOSM.

== Usage ==

=== Usage on areas ===

1. Enable mode, you will need to select ('''at least''') two points for every area; but not [#Usageonways on ways] - there no requirement in minimal node count for ways that are not areas;
2. 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);
3. After all 2+ points selected, you can pick one of 2+ parts as ''source geometry'' to move. Hover mouse over part and you will (cursor: move with 4 arrows);
4. After you started to drag ''source geometry'', you have one of two options in target geometry. Your ''source geometry'' will change it's shape to a ''target geometry'' shape after mouse hover and icon of a shortcut will be displayed;
5. Contours will be merged. But if ''source geometry'' had only one segment left, it will be completely collapsed;
6. You can repeat steps 2-6 as many times as you want until tool will disabled or there nothing left to merge

No cut points selected on the left (because both objects are ways, not area) and complete collapse of the source geometry on the right:

[[Image(ex1-merge-contour-with-another-countour-usage-on-areas.gif,nolink)]]
[[Image(ex3-merge-contour-with-another-countour-usage-on-areas.gif,nolink)]]

=== Usage with ways ===

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

Note no cut points were selected on the left (because both objects are way, not areas) and multiple source geometries on the right:

[[Image(ex2-merge-contour-with-another-countour-usage-on-ways.gif,nolink)]]
[[Image(ex4-merge-contour-with-another-countour-usage-on-areas.gif,nolink)]]

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