[OpenLayers-Users] Dynamically Sized Points With Styles

[Chris Streeter]

As a followup to this question, I'm trying to wrap my head around how to
translate actual distances to what is shown on the map.  For example, if I
wanted to create a feature with a radius of 20 kilometers, how do I specify
the radius for the feature based on the map's resolution and scale.  I'm not
quite clear on how feature radii relate to map resolution and scale.

Thanks,

- Chris

On Wed, Oct 8, 2008 at 11:49, Arnd Wippermann <arnd.wippermann at web.de>wrote:

>
> http://n2.nabble.com/GML%2C-Point-and-Change-the-Size-of-the-Circle...-tc791275.html#a791275
>
> listen to the zoom event and redraw the feature with the new styleMap,
> where the pointRadius is a function of the zoom level:
>
> new OpenLayers.StyleMap({
>     "default": OpenLayers.Util.applyDefaults({
>         pointRadius: faktor*map.getZoom()
>     }, OpenLayers.Feature.Vector.style["default"]
> });
> Arnd Wippermann
>  ------------------------------
> *Von:* users-bounces at openlayers.org [mailto:users-bounces at openlayers.org]
> *Im Auftrag von *Chris Streeter
> *Gesendet:* Mittwoch, 8. Oktober 2008 07:04
> *An:* users at openlayers.org
> *Betreff:* [OpenLayers-Users] Dynamically Sized Points With Styles
>
>  I was wondering if it is possible to dynamically resize a point based on
> the zoom level of the map.
>
> With the example at
> http://www.openlayers.org/dev/examples/styles-unique.html, can we make the
> points change their radius as we zoom in?  I'd like to keep the circles the
> same relative size to the underlying map layer.
>
> Thanks,
>
> - Chris
>
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