topic about line of sight in 3D Questions https://community.esri.com/t5/3d-questions/about-line-of-sight/m-p/232005#M1410 <HTML><HEAD></HEAD><BODY><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I want to use line of sight and I have a problem.For Example I select an observer and a target and When I run this program, it is visible.But I want to learn nearest height on this road.(observer -&gt; target) İf height is&nbsp; smaller than 500 meter on road , this road should be invalid.How can I do this.(in .NET C#)</SPAN></BODY></HTML> Wed, 07 Nov 2012 09:43:51 GMT HasanKapukiran 2012-11-07T09:43:51Z about line of sight https://community.esri.com/t5/3d-questions/about-line-of-sight/m-p/232005#M1410 <HTML><HEAD></HEAD><BODY><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I want to use line of sight and I have a problem.For Example I select an observer and a target and When I run this program, it is visible.But I want to learn nearest height on this road.(observer -&gt; target) İf height is&nbsp; smaller than 500 meter on road , this road should be invalid.How can I do this.(in .NET C#)</SPAN></BODY></HTML> Wed, 07 Nov 2012 09:43:51 GMT https://community.esri.com/t5/3d-questions/about-line-of-sight/m-p/232005#M1410 HasanKapukiran 2012-11-07T09:43:51Z