https://community.esri.com/t5/3d-questions/line-of-sight-tool-output-feature-class-does-not/m-p/1295992#M4879 <P>I'm trying to use the Line of Sight (3d Analyst) tool to determine new building obstructions.&nbsp; I have a DEM assigned to my scene and I have target and observation point feature classes with elevation from a field that I used to create Sight Lines with the Construct Sight Lines tool.&nbsp; The elevation of the Sight Lines is set to a geometry z value at "Relative to Ground" and all line up with their actual physical location.&nbsp; When I run the Line of Sight tool the resulting feature class appears lower than my Sight Lines which causes erroneous "Not Visible" features and obstruction points to be created.&nbsp; The Line of Sight feature class lines up exactly with my Sight Lines if I change the elevation setting to "At an Absolute Height" but then they would be in the wrong location (lower).&nbsp; How do I force the tool to use the correct elevation setting? Any suggestions or input greatly appreciated.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Line of Sight Tool parameters" style="width: 545px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/72380iBD51A80C72532C49/image-size/large?v=v2&amp;px=999" role="button" title="Screenshot 2023-06-05 161523.png" alt="Line of Sight Tool parameters" /><span class="lia-inline-image-caption" onclick="event.preventDefault();">Line of Sight Tool parameters</span></span><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Sight Lines elevation setting" style="width: 639px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/72381i234FB6F428529BD9/image-size/large?v=v2&amp;px=999" role="button" title="Screenshot 2023-06-05 150408.png" alt="Sight Lines elevation setting" /><span class="lia-inline-image-caption" onclick="event.preventDefault();">Sight Lines elevation setting</span></span><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Line of Sigh tool output is thin green line hitting the ground and Sight Line is thick green line above in correct location," style="width: 999px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/72382iB887660581DC0E90/image-size/large?v=v2&amp;px=999" role="button" title="Screenshot 2023-06-05 160903.png" alt="Line of Sigh tool output is thin green line hitting the ground and Sight Line is thick green line above in correct location," /><span class="lia-inline-image-caption" onclick="event.preventDefault();">Line of Sigh tool output is thin green line hitting the ground and Sight Line is thick green line above in correct location,</span></span></P> Mon, 05 Jun 2023 20:24:22 GMT kcederholm6 2023-06-05T20:24:22Z https://community.esri.com/t5/3d-questions/line-of-sight-tool-output-feature-class-does-not/m-p/1295992#M4879 <P>I'm trying to use the Line of Sight (3d Analyst) tool to determine new building obstructions.&nbsp; I have a DEM assigned to my scene and I have target and observation point feature classes with elevation from a field that I used to create Sight Lines with the Construct Sight Lines tool.&nbsp; The elevation of the Sight Lines is set to a geometry z value at "Relative to Ground" and all line up with their actual physical location.&nbsp; When I run the Line of Sight tool the resulting feature class appears lower than my Sight Lines which causes erroneous "Not Visible" features and obstruction points to be created.&nbsp; The Line of Sight feature class lines up exactly with my Sight Lines if I change the elevation setting to "At an Absolute Height" but then they would be in the wrong location (lower).&nbsp; How do I force the tool to use the correct elevation setting? Any suggestions or input greatly appreciated.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Line of Sight Tool parameters" style="width: 545px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/72380iBD51A80C72532C49/image-size/large?v=v2&amp;px=999" role="button" title="Screenshot 2023-06-05 161523.png" alt="Line of Sight Tool parameters" /><span class="lia-inline-image-caption" onclick="event.preventDefault();">Line of Sight Tool parameters</span></span><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Sight Lines elevation setting" style="width: 639px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/72381i234FB6F428529BD9/image-size/large?v=v2&amp;px=999" role="button" title="Screenshot 2023-06-05 150408.png" alt="Sight Lines elevation setting" /><span class="lia-inline-image-caption" onclick="event.preventDefault();">Sight Lines elevation setting</span></span><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Line of Sigh tool output is thin green line hitting the ground and Sight Line is thick green line above in correct location," style="width: 999px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/72382iB887660581DC0E90/image-size/large?v=v2&amp;px=999" role="button" title="Screenshot 2023-06-05 160903.png" alt="Line of Sigh tool output is thin green line hitting the ground and Sight Line is thick green line above in correct location," /><span class="lia-inline-image-caption" onclick="event.preventDefault();">Line of Sigh tool output is thin green line hitting the ground and Sight Line is thick green line above in correct location,</span></span></P> Mon, 05 Jun 2023 20:24:22 GMT https://community.esri.com/t5/3d-questions/line-of-sight-tool-output-feature-class-does-not/m-p/1295992#M4879 kcederholm6 2023-06-05T20:24:22Z