topic Re: finding elevation difference in 3D Questions https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586053#M3523 <HTML><HEAD></HEAD><BODY><P>the spatial join option worked. Thanks a lot !!!<IMG src="https://community.esri.com/legacyfs/online/emoticons/happy.png" /></P></BODY></HTML> Tue, 06 Jan 2015 04:04:59 GMT PolashBanerjee 2015-01-06T04:04:59Z finding elevation difference https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586050#M3520 <HTML><HEAD></HEAD><BODY><P>How to find the difference in elevation between points and line feature (example, ground locations and roadway in a hilly terrain) when z-value is available as attribute to these features? </P></BODY></HTML> Mon, 05 Jan 2015 13:50:22 GMT https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586050#M3520 PolashBanerjee 2015-01-05T13:50:22Z Re: finding elevation difference https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586051#M3521 <HTML><HEAD></HEAD><BODY><P>Assuming that these are 3d points/lines without the elevation attributes exposed in the table, I would first convert the line to points. Expose the z-value of the converted points then do a spatial join (closest) with the point data (with exposed z-values). The z-value can then be compared in the resulting joined data.</P><P></P><P>Or if they already have the z-values in the attribute table, you can also just do a spatial join (closest) using the point as your target and the line as the join feature.</P></BODY></HTML> Mon, 05 Jan 2015 22:04:11 GMT https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586051#M3521 MikeCusi 2015-01-05T22:04:11Z Re: finding elevation difference https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586052#M3522 <HTML><HEAD></HEAD><BODY><P>More accurate would to create a script (python), join the point to a location on the line and interpolate the Z values&nbsp; of the two vertices on both sides of the projected point, based on the distance to the point. Obviously you will have to take the distance of the point to the line into consideration. </P><P></P><P>If the number of points is dense, you could create a TIN and then analyze that in relation to the Z-values of the line.</P></BODY></HTML> Mon, 05 Jan 2015 22:23:40 GMT https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586052#M3522 XanderBakker 2015-01-05T22:23:40Z Re: finding elevation difference https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586053#M3523 <HTML><HEAD></HEAD><BODY><P>the spatial join option worked. Thanks a lot !!!<IMG src="https://community.esri.com/legacyfs/online/emoticons/happy.png" /></P></BODY></HTML> Tue, 06 Jan 2015 04:04:59 GMT https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586053#M3523 PolashBanerjee 2015-01-06T04:04:59Z Re: finding elevation difference https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586054#M3524 <HTML><HEAD></HEAD><BODY><P>I am at level 0 in python scripting <IMG src="https://community.esri.com/legacyfs/online/emoticons/cry.png" />, so its gonna&nbsp; take some time I guess to value your suggestion. Thanx a lot anyway. </P></BODY></HTML> Tue, 06 Jan 2015 04:07:02 GMT https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586054#M3524 PolashBanerjee 2015-01-06T04:07:02Z Re: finding elevation difference https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586055#M3525 <HTML><HEAD></HEAD><BODY><P>If the spatial join worked for you, than I would stick to that. Do have a look at the distance field to verify that points are not joined to distant features. In case you change your mind in the future, Python is relatively easy to learn and there are many capable people at this forum that are willing to guide you in the process.</P><P></P><P>Just don't forget to mark the answer from <A href="https://community.esri.com/migrated-users/98510">Mike Cusi</A>‌ as the correct answer.</P></BODY></HTML> Tue, 06 Jan 2015 22:55:23 GMT https://community.esri.com/t5/3d-questions/finding-elevation-difference/m-p/586055#M3525 XanderBakker 2015-01-06T22:55:23Z