Hey- Heidt, Christopher M. wrote: > this is definitly a clever aproach, but it is still a work-around for > what i consider to be a basic shape. > I just wonder why i cant have something along the lines of: new > Openlayers.Geometry.Circle(lon,lat,radius);
Would you expect this to be a circle on the ground or a circle on your map? If the former, you'd be disappointed. Not sure if it has been mentioned in this thread, but if you want a regular polygon with many sides (approximating a circle), you can use the OpenLayers.Polygon.createRegularPolygon method [1]. See the modify feature example for use (and set the number of sides to 30 or so) [2]. Tim [1] http://dev.openlayers.org/apidocs/files/OpenLayers/Geometry/Polygon-js.html#OpenLayers.Geometry.Polygon.createRegularPolygon [2] http://openlayers.org/dev/examples/modify-feature.html > ------------------------------------------------------------------------ > *From:* Estanislao Gonzalez [mailto:[EMAIL PROTECTED] > *Sent:* Mon 12/8/2008 11:47 AM > *To:* Heidt, Christopher M. > *Subject:* Re: [OpenLayers-Users] Circles > > That's not true. You can always recalculate the circle radius when > changing the zoom. That's what I did and had no problem at all. > > //radius unit is in kilometers > var DOTS_PER_UNIT = OpenLayers.INCHES_PER_UNIT.km * > OpenLayers.DOTS_PER_INCH; > > // 5 km radius > var circleRadius = 5; > > "default": new OpenLayers.Style({ > pointRadius: "${radius}" > }, { > context: { > radius: function(feature){ > //very rough. Be sure it is at least somehow correct. > var rad = circleRadius * DOTS_PER_UNIT / > feature.layer.map.getScale(); > return rad; > } > } > > }); > > Still I didn't check if the measurement is right, but it is constant. So > you might have to multiply it by a constant if required (probably by > adapting DOTS_PER_UNIT). > > Note that I'm reading the radius from a feature in a WFS layer, so you > might have to change that as well (feature.attributes.radius) > > Hope it helps, > > Regards, > Estani > > Heidt, Christopher M. schrieb: > > right, changing a points radius in the style makes the marker that > represents a point larger, but it isnt a "Circle" Feature because it > remains the same size when u zoom in and out. > > > > oracle has a WKT outputer that makes a CURVEPOLYGON(# #,# #,# #,# #) > or some such nonsence to represent circles. the problem is that it isnt > part of the WKT spec so nothing supports it. > > > > I'd change it to a format that is supported, > > but i can't find anything in any format that can represent a circle. > > Anybody know if it would be a daunting task to add CURVEPOLYGON > support to the WKT parser? > > > > ________________________________ > > From: [EMAIL PROTECTED] on behalf of Lehtonen, Mika > > Sent: Tue 12/2/2008 2:23 PM > > To: Didrik Pinte > > Cc: users@openlayers.org > > Subject: Re: [OpenLayers-Users] Circles > > > > > > Hi Didrik, > > > > I guess the points are still points regardless of their style? So you > > can't use their geometry as a replacement of a circle? > > > > - mika - > > > > Didrik Pinte kirjoitti: > > > >> On Tue, 2008-12-02 at 08:27 -0500, Heidt, Christopher M. wrote: > >> > >> > >>> Probably a dumb question, but how can I create a circle feature using > >>> the api? > >>> > >>> I'm hoping you're not going to say I have to generate a bunch of > >>> points an make a polygon :( > >>> > >>> > >> Using a point with a style using a radius will do it fine. > >> > >> For example : > >> http://openlayers.org/dev/examples/stylemap.html > >> > >> Didrik > >> > >> ------------------------------------------------------------------------ > >> > >> _______________________________________________ > >> Users mailing list > >> Users@openlayers.org > >> http://openlayers.org/mailman/listinfo/users > >> > >> > > _______________________________________________ > > Users mailing list > > Users@openlayers.org > > http://openlayers.org/mailman/listinfo/users > > > > > > > -- > Dipl.-Kfm. Estanislao Gonzalez, Fraunhofer-Institut für Software- und > Systemtechnik ISST > Location-based Services, Steinplatz 2, 10623 Berlin, Germany > Telefon: +49 (0) 30 / 2 43 06-3 36 > mailto:[EMAIL PROTECTED] > www.isst.fraunhofer.de > > > ------------------------------------------------------------------------ > > _______________________________________________ > Users mailing list > Users@openlayers.org > http://openlayers.org/mailman/listinfo/users -- Tim Schaub OpenGeo - http://opengeo.org Expert service straight from the developers. _______________________________________________ Users mailing list Users@openlayers.org http://openlayers.org/mailman/listinfo/users