[[TranslatedPages]]

= Contourmerge Plugin =

[[Image(/pluginicon/contourmerge.jar/images/mapmode/contourmerge.png)]]

== Usage ==

=== Usage on areas ===

1. ''Enable mode, you will need to select two points for every area (make sure you are editing areas, not [#Usageonways on ways])''
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 4 points selected, you can pick one of 4 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 collaplsed''

Regular usage on the left and complete collapse to 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 on ways ===

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

= Old content below =
== In a nutshell ==

The {{{contourmerge}}} plugin helps you to align the contours of areas in JOSM.

[[Image(lake-and-forest.1.png,align=left, valign=top, margin-right=10)]]
Here's a typical example: a '''lake''' with a detailled shoreline and a '''forest'''. 

The contour of the forest should be aligned with the lakes shoreline. 

Select the {{{contourmege}}} map mode in the toolbar for map modes and perform the steps below.
{{{
#!html
<br clear="all"/>
}}}

=== Step 1 - Select the "cut-nodes" ===

[[Image(lake-and-forest.2.png, 160px, align=left, valign=top, margin-right=20)]]

* Select the part of the contour you want to merge, in both the areas for the lake and the forest. '''Left-Click''' on the respective nodes to mark them as selected.

{{{
#!html
<br clear="all"/>
}}}


=== Step 2 - Drag the source contour ===

[[Image(lake-and-forest.3.png, 160px, align=left, valign=top, margin-right=20)]]
* Drag the source contour between two "cut-nodes"

{{{
#!html
<br clear="all"/>
}}}
[[Image(lake-and-forest.4.png,160px, align=left, valign=top, margin-right=20)]]
* When you drag it over a possible target contour, the source contour is aligned with the target contour.

{{{
#!html
<br clear="all"/>
}}}

=== Step 3 - Align the contours ===
[[Image(lake-and-forest.5.png, 160px, align=left, valign=top, margin-right=20)]]
* Drop the source contour. The contours of the lake and the forest are merged.

If the merge doesn't happen as expected, reversing one of the ways helps.

{{{
#!html
<br clear="all"/>
}}}

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