I would note that the circle is 1600 wide (as expected) but the scale distance between roads ~ 2500m. You are running foul of the fact mercator a terrible projection for this kind of use. ie the ratio of map distance to true distance gets large as you move towards the poles. On a good map in mercator, you will see often that varying scale in the legend.
Fixing it. From memory, for spherical mercator scale is h=1/cos(lat), so instead of 800, you would use 800/cos(lat). You need to be very careful that the projection you use for a map is "fit for purpose". If distance is important, then the distance from OL is meters on the projection and you might want to correct that to true scale. Notice: This email and any attachments are confidential. If received in error please destroy and immediately notify us. Do not copy or disclose the contents. _______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users
