A control displaying rough y-axis distances, calculated for the center of the
viewport. For conformal projections (e.g. EPSG:3857, the default view
projection in OpenLayers), the scale is valid for all directions.
No scale line will be shown when the y-axis distance of a pixel at the
viewport center cannot be calculated in the view projection.
By default the scale line will show in the bottom left portion of the map,
but this can be changed by using the css selector .ol-scale-line.
new ScaleLine(opt_options)
control/ScaleLine.js, line 63
Name
Type
Description
options
Scale line options.
Name
Type
Default
Description
className
string
'ol-scale-line'
CSS Class name.
minWidth
number
64
Minimum width in pixels.
render
function
Function called when the control
should be re-rendered. This is called in a requestAnimationFrame callback.
target
HTMLElement
|
string
Specify a target if you want the control
to be rendered outside of the map's viewport.
OpenLayers