[[TranslatedPages]]
= Improve Way Accuracy =
[[Image(source:trunk/images/mapmode/improvewayaccuracy.png)]] ''Keyboard shortcut:'' **{{{W}}}**  — is a one of the [wiki:Help/Modes JOSM modes]

This mode can ''add, move and delete'' '''nodes''' of the previously entered [Help/Concepts/Object ways]; this mode used only to update existing data (ways).

The goal of the mode is to substitute dragging and dropping nodes with clicking to quicken the editing process.

== Activation steps ==

Two options:
* Select a way, then [Help/Modes#Activateamode activate a mode as usual]
* Activate a mode, then select a way to update (icon: [[Image(source:trunk/images/cursor/modifier/mode.png,middle,nolink)]])

To start working on a different way without leaving the mode, unselect current way by pressing **{{{Esc}}}** and click on another one.

== Usage ==

Mode automatically finds segments and nodes that are the closest to the cursor. Candidate for deletion/move/addition will be changed as many times as you move cursor.

Highlighted node can be locked (see [[#Locksegment]]).

When you add or move nodes, **they are not merged with existing nodes** as it happens in the [[Select|Select]] or [[Draw|Draw]] modes. You have to quit editing in ''Improve Way Accuracy'' mode and use [[MergeNodes|merge nodes]] tool or alternatives.

=== To move existing nodes ===

Click on the map where you think a node should be. The highlighted (nearest) node will be moved there.

''Helper geometry: dashed red line - indicates a way after moved node''

=== To create new nodes [[Image(source:trunk/images/cursor/modifier/addnode.png,middle,nolink,inline)]] (+{{{Ctrl}}}) ===

[[Image(JOSM-plugin-IWA-example.jpg, right)]]

Hold **{{{Ctrl}}}** button and click - a new node will be added into highlighted segment.

''Helper geometry: solid red line - indicates a way after new node''

=== To remove nodes [[Image(source:trunk/images/cursor/modifier/delete.png,middle,nolink,inline)]] (+{{{Alt}}}) ===

Hold **{{{Alt}}}** button and click - the highlighted node will be deleted. 

Please try to keep as much existing nodes as you can, because thus you keep their history.

**You cannot delete nodes that are connected to more than one way or that have tags** to prevent accidental breaking of topology or loss of information. Note that "uninteresting" tags are excluded, like FIXME, note, source, etc.

If {{{Alt}}} doesn't work, see [[Shortcuts#Altkey]].

=== Lock segment ===

* Lock moved node: [[Image(source:trunk/images/cursor/modifier/lock.png,middle,nolink)]] + {{{Shift}}} - when moving a mouse, hold **{{{Shift}}}** or left mouse button and the highlighted node or segment will be kept the same no matter where you move the cursor.
* Lock added node: [[Image(source:trunk/images/cursor/modifier/add_node_lock.png,middle,nolink)]] + {{{Ctrl}}} {{{Shift}}}


== See also ==

* [[Image(source:trunk/images/dialogs/mappaint/wireframe_small.svg,20,nolink,middle)]] {{{Ctrl+W}}} [wiki:Help/Action/WireframeToggle "Wireframe view"] - turns off any styles and makes lines very thin, it might be a good idea to toggle that view before improving ways accuracy

== External resources ==

* [http://www.youtube.com/watch?v=NzunbvpVIX4 Improve Way Accuracy used to adjust imprecise highway]

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