topic Re: Creating ClassBreaks for rendering graphics (polygons) in ArcGIS API for Silverlight Questions

Creating ClassBreaks for rendering graphics (polygons)

VincenzoPiscitelli — Tue, 05 Apr 2011 16:30:24 GMT

Given a set of values, how would one go about generating the appropriate classes to use in the ClassBreaksRenderer.

Details:

I first query a data source via a web service. Using the results of the query I need to build a ClassBreaksRenderer and apply it to a dynamic layer with a where clause to restrict the polygons. The same where clause was used to get the data in the first place.

Example:

Polygon     Population
----------------------------
CSD1        125,121
CSD2        49,125
CSD3        495,824
CSD4        120,458
CSD5        325,958

Ideally I would like ranges that would include all the data, with equal sized ranges. In the real app, there may be hundreds of values.

Could this be done client-side? And if so, how would one construct the ranges.

Any help would be appreciated.

Re: Creating ClassBreaks for rendering graphics (polygons)

DominiqueBroux — Wed, 06 Apr 2011 07:09:41 GMT

Did you look at this sample : http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#Thematic_Interactive ?

Seems close to what you need.

Re: Creating ClassBreaks for rendering graphics (polygons)

VincenzoPiscitelli — Wed, 06 Apr 2011 11:08:32 GMT

Did you look at this sample : http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#Thematic_Interactive ?

Seems close to what you need.

I don't know how I missed that sample. I could have sworn that I examined each one. Thanks for the info. It is close to what I want and I can definitely expand on that sample.

Thanks again.