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Openlayers Controls??

Openlayers??????????????GIS??????????????????????????????????????????????????????????????????Openlayers??????????????

1. ScaleLine??

ScaleLine????????????????????????????????????????????????????????????ScaleLine???????????

map.addControl(new ol.control.ScaleLine());

2. OverviewMap??

OverviewMap?????????????????????????????????????????????????????????

map.addControl(new ol.controlOverviewMap({  layer: map.layers[0]}));

3. FullScreen??

FullScreen?????????????????????????????????????

map.addControl(new ol.control.FullScreen());

4. Attribution??

Attribution???????????????????????????????????????????????

map.addControl(new ol.control.Attribution());

5. Rotate??

Rotate?????????????????????????????????????????????

map.addControl(new ol.control.Rotate());

6. Zoom??

Zoom????????????????????????????????????????????

map.addControl(new ol.control.Zoom());

7. ZoomSlider??

ZoomSlider?????????????????????????????????????????????

map.addControl(new ol.control.ZoomSlider());

8. MousePosition??

MousePosition????????????????????????????????????????????

map.addControl(new ol.control.MousePosition());

9. ZoomToExtent??

ZoomToExtent?????????????????????????????????

map.addControl(new ol.control.ZoomToExtent());

Openlayers Controls????

Openlayers???????addControl()???????removeControl()????????

map.addControl(new ol.control.FullScreen());map.removeControl(map.getControl('attribution'));

????????????????????????????????Openlayers?????????????????????????????

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