[OpenLayers-Users] RegularPolygon radius document questions

[杨华杰]

nice, thank you very much, it help me a lot


On Mon, Jan 28, 2013 at 4:38 PM, Grégory COLLIN <gcollin at v3d.fr> wrote:

> Le Mon, 28 Jan 2013 08:15:48 +0100,
> 杨华杰 <yhjhoo at gmail.com> a écrit :
>
> > Hi
> >
> > I have a question about the document.
> >
> > Here is the URL:
> >
> http://dev.openlayers.org/docs/files/OpenLayers/Handler/RegularPolygon-js.html#OpenLayers.Handler.RegularPolygon.setOptions
> >
> >
> >
> > The
> > radius<
> http://dev.openlayers.org/docs/files/OpenLayers/Handler/RegularPolygon-js.html#OpenLayers.Handler.RegularPolygon.radius
> >
> > explain as {Float} Optional radius in map units of the regular
> > polygon.
> >
> >
> > What's the unit? kilometer/meter/mile/NM?
> >
> >
> > Regards,
> > Hua Jie
>
> Hi Hua Jie,
>
> The units requested could be defined in the map object.
>
> So here is the code sample i used :
>
>   var map = new OpenLayers.Map({
>        div: "map",
>        theme: null,
>        units: 'm',
>        projection: "EPSG:900913",
>        controls: [
>          new OpenLayers.Control.Navigation({zoomWheelEnabled: false}),
>          new OpenLayers.Control.NavToolbar({zoomWheelEnabled: false}),
>          new OpenLayers.Control.PanZoomBar(),
>          new OpenLayers.Control.ScaleLine()]
>     });
>
>
> So you can add the unit you want in this constructor.
> according to the documentation :
>
> http://dev.openlayers.org/releases/OpenLayers-2.6/doc/apidocs/files/OpenLayers/Map-js.html#OpenLayers.Map.units
>
> you can specify : ‘degrees’ (or ‘dd’), ‘m’, ‘ft’, ‘km’, ‘mi’, ‘inches’.
>
> Enjoy,
>
> Best regards.
>
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