topic Re: Change symbol when more than 1 object at the same coordinate. in ArcGIS API for Silverlight Questions

Change symbol when more than 1 object at the same coordinate.

CarlTremblay — Wed, 01 Dec 2010 12:02:24 GMT

Hello all,
I would like to know, what is the best way to show a particular symbol if I got more than one object at the same coordinate ? Is there a way to do it directly in the MXD or at runtime with the Silverlight API.

Thank you verry much

Re: Change symbol when more than 1 object at the same coordinate.

nakulmanocha — Wed, 01 Dec 2010 15:14:24 GMT

Could you please elaborate on your work flow? Are you looking to have a particular symbol if more than one features are located on the exact same location? and are these features from the same feature layer or different? I am assuming you are looking to display a graphic where more than one features (point geometry) coincide. Please clarify. Thank you.

Re: Change symbol when more than 1 object at the same coordinate.

CarlTremblay — Wed, 01 Dec 2010 15:58:27 GMT

Thanx, you are right, features comes from the same location and I want to display another graphic
when 2 or more features coincide (X/Y perfectly match).
I tough I could create an Oracle view with a group by ... But is there any other way to do this ?
Thanx a lot ...

Re: Change symbol when more than 1 object at the same coordinate.

MarniFowler — Thu, 28 Jun 2012 14:25:30 GMT

I need to do this exact same thing. Any suggestions?

Re: Change symbol when more than 1 object at the same coordinate.

DominiqueBroux — Fri, 29 Jun 2012 09:47:16 GMT

If you are using a DynamicMapService layer or a tiled layer. This has to be done at the server side. But I am not sure if this can be done easily (probably by using cartographic rules). You may get better answers by posting the question on the server forum.

If it's a feature layer, you should be able to do it by code at the client side. For each graphic that overlaps another graphic(tolerance to define), you can change the symbols of these graphics.
Unfortunately I don't see any sample doing that.

Re: Change symbol when more than 1 object at the same coordinate.

LanceCrumbliss — Fri, 29 Jun 2012 12:10:54 GMT

What I've done for points features is create a symbol that repeatedly animates slowly, very slightly growing and shrinking the symbol. Since the animation for each point doesn't seem to start at the same time, it forces at least part of each symbol to be exposed and visible at some point during the animation. Obviously, this is rendering client-side.

Lance