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JOSM/Plugins/FastDraw
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JOSM/Plugins/FastDraw
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Contents
Fast Draw - creating lines with mouse or pen
Usage:
2.1
Advanced
2.1.1
Editing existing line
2.1.2
Edit action list [no undo!]
2.1.3
Snapping to existing nodes, point fixation
2.1.4
Simplification detailed description
Fast Draw - creating lines with mouse or pen
Example usage of using the plugin to trace a complicated geometry.
Main area of usage - tracing forests, rivers, lakes, twisted roads etc. without too much clicking.
Line is drawn by mouse, then simplified and becomes a way.
It is a specialized alternative to standard drawing tool (A).
Please use simplification and validator! Do not upload huge and self-intersecting lines.
Usage:
GIF of Fast Draw use in context CLIC TO SEE
Main cycle
Shift
draw by mouse
Enter
looking in status bar —
Enter
or
Ctrl
Enter
Enter the drawing mode -
Shift
button (when there are no shortcut conflicts), or
in left panel.
Draw object contour by mouse. Available actions:
Click
or mouse dragging - adding new nodes to the line (you can draw a line by dragging or by single clicks)
Ctrl
+ Click
= add
fixed
node (green). Fixed nodes will go to final line for any level of simplification, they are also used to delimit line
fragments
(for example, 4 bounds of forest, used rarely)
Space bar
is equivalent to mouse click. You can hold it and draw too.
arrows - changing minimal distance between auto-added points (starting from fastdraw.mindelta advanced parameter).
Backspace
- delete last node.
Shift
+ Click
- delete selected node (highlighted by cross) or line fragment.
Dragging
the node, to move it.
When drawing fragment is finished, press
Enter
. The line is simplified and becomes orange. When automatic simplification is turned on
epsilon
parameter is tuned if maximal
points per 1 km
count is too high (configured by
).
You can drag the map and zoom; look in status bar for statistics. If you see that there are too many nodes - press
, too few nodes - press
. You can skip this step or press multiple times.
Configuration windows, reachable pressing Q key when the plugin is selected on the toolbar
- main
drawing and simplification settings
(all listed in advanced JOSM preferences fastdraw.*).
Press
Enter
a second time
(or start drawing next line, or switch the map mode) - way is created and selected. If you press
Ctrl
Enter
tags from clipboard are pasted.
To start new drawing press
Shift
again.
You can give feedback or propose enhancements in
or by using JOSM TRAC
Advanced
Editing existing line
If only one way is selected (not downloaded from server, to reduce possible problems), you can redraw or re-simplify it by pressing
Shift
twice (
Shift
Shift
). Unused points will be deleted when saving line (
Enter
Enter
). Beware - tags are deleted. Undo
Ctrl
works. This feature can be used to simplify alternatively created ways (tracks etc.) or for resimplifying with different parameters.
Edit action list [no undo!]
Backspace
- delete last added point.
Shift
+ Click
- delete selected point or line fragment.
Dragging
node moves it.
After deleting line fragment you can
redraw
it by mouse. Segment being redrawn is highlighted orange. Always draw from start to the end of line! To
return to line continuation
from this mode press
Shift
+ Click
not on a node or
ESC
Ctrl
Shift
+ Click
- delete the whole line and start new one
Snapping to existing nodes, point fixation
When dragging and clicking near existing nodes, these can be automatically included in drawn line (they become fixed and are not changed by simplification). You can turn off this behaviour in settings (
).
After clicking on starting line point you close the line, it can not be continued by mouse.
Ctrl
+ Click
on existing line point - fix or release this point.
By using checkboxes in settings, you can force all nodes added by
mouse clicks
or
Space bar
to be fixed.
Simplification detailed description
When
Enter
if first pressed, depending on settings plugin performs
simplification with initial epsilon
or
autosimplification
: while there are line fragments with 10 (
fastdraw.pkmblocksize
) points with PointsPer1Km greater then max PKM(
fastdraw.maxpkm
), detalization is decreased.
Initial epsilon value is given in
screen pixels
fastdraw.startingEps
), so the simplification depends on current zoom level.
buttons multiply epsilon by configured coefficient (
fastdraw.epsilonmult
). Current line information is displayed in status bar.
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