Comments on: Proportional Circle Maps in GeoMedia http://jeffhobbs.net/2008/03/26/proportional-circle-maps-in-geomedia/ "A picture is only worth a thousand words. A map may be worth a thousand numbers. But a GIS is worth a thousand tables." Mon, 26 Jul 2010 03:43:50 +0000 hourly 1 http://wordpress.com/ By: danielle miller http://jeffhobbs.net/2008/03/26/proportional-circle-maps-in-geomedia/#comment-2184 danielle miller Thu, 29 Jan 2009 23:04:09 +0000 http://jeffhobbs.wordpress.com/2008/03/26/proportional-circle-maps-in-geomedia/#comment-2184 when you get this please email my back because this is my homework. ASAP pleaes:( when you get this please email my back because this is my homework.

ASAP pleaes:(

]]> By: danielle miller http://jeffhobbs.net/2008/03/26/proportional-circle-maps-in-geomedia/#comment-2183 danielle miller Thu, 29 Jan 2009 23:01:56 +0000 http://jeffhobbs.wordpress.com/2008/03/26/proportional-circle-maps-in-geomedia/#comment-2183 how do you draw a circle map to arang things?i do not want a picture of a united states!!!!!! how do you draw a circle map to arang things?i do not want a picture of a united states!!!!!!

]]> By: xav http://jeffhobbs.net/2008/03/26/proportional-circle-maps-in-geomedia/#comment-2152 xav Tue, 23 Dec 2008 09:08:11 +0000 http://jeffhobbs.wordpress.com/2008/03/26/proportional-circle-maps-in-geomedia/#comment-2152 Seems a wrong solution. Proportional circles, as the name suggests, must be directly proportional to the dimension shown. So, circle area of a state having 53,2 % of another one must be exactly 53,2 % of this state (see the example map - first picture). Working with classes in then wrong. The solution is to create a field containing the radius of the circle and then to use the buffer option. As surface = pop = Pi*R^2, then Radius = sqrt(pop/Pi). of course then, you probably must use a dividing factor or play with units to get a reasonable circle size. This solution is not easy but is correct although displaying a legend is difficult... I think a software like Geomedia should implement such a basic cartographic functionality. Seems a wrong solution. Proportional circles, as the name suggests, must be directly proportional to the dimension shown. So, circle area of a state having 53,2 % of another one must be exactly 53,2 % of this state (see the example map – first picture). Working with classes in then wrong.
The solution is to create a field containing the radius of the circle and then to use the buffer option. As surface = pop = Pi*R^2, then Radius = sqrt(pop/Pi). of course then, you probably must use a dividing factor or play with units to get a reasonable circle size.
This solution is not easy but is correct although displaying a legend is difficult…
I think a software like Geomedia should implement such a basic cartographic functionality.

]]> By: zelazko http://jeffhobbs.net/2008/03/26/proportional-circle-maps-in-geomedia/#comment-1896 zelazko Wed, 02 Apr 2008 12:09:14 +0000 http://jeffhobbs.wordpress.com/2008/03/26/proportional-circle-maps-in-geomedia/#comment-1896 It is another way - centerpoint + atribute base symbology - 1 legend entry, no thematic It is another way – centerpoint + atribute base symbology – 1 legend entry, no thematic

]]>