topic which vertical coordinate system should I use for arcgis online in ArcGIS Online Questions https://community.esri.com/t5/arcgis-online-questions/which-vertical-coordinate-system-should-i-use-for/m-p/472362#M23792 <HTML><HEAD></HEAD><BODY><P>I would like to add a layer to arcGIS online that has vertical coordinates. Which coordinate system and projection should I use? </P></BODY></HTML> Wed, 06 Aug 2014 20:32:44 GMT AllisonHoff 2014-08-06T20:32:44Z which vertical coordinate system should I use for arcgis online https://community.esri.com/t5/arcgis-online-questions/which-vertical-coordinate-system-should-i-use-for/m-p/472362#M23792 <HTML><HEAD></HEAD><BODY><P>I would like to add a layer to arcGIS online that has vertical coordinates. Which coordinate system and projection should I use? </P></BODY></HTML> Wed, 06 Aug 2014 20:32:44 GMT https://community.esri.com/t5/arcgis-online-questions/which-vertical-coordinate-system-should-i-use-for/m-p/472362#M23792 AllisonHoff 2014-08-06T20:32:44Z Re: which vertical coordinate system should I use for arcgis online https://community.esri.com/t5/arcgis-online-questions/which-vertical-coordinate-system-should-i-use-for/m-p/472363#M23793 <HTML><HEAD></HEAD><BODY><P>Hi Allison,</P><P></P><P>ArcGIS Online uses the WGS 1984 Web Mercator (auxiliary sphere) coordinate system:</P><BLOCKQUOTE><TABLE border="1"><TBODY><TR><TD> <P><SPAN style="font-size: 10.0pt; font-family: 'Arial','sans-serif'; color: #4d4d4d; background: white;">When designing your map, use the WGS 1984 Web Mercator (auxiliary sphere) coordinate system, which is the same coordinate system used by </SPAN>ArcGIS Online, Google Maps, and Bing Maps.</P> </TD></TR></TBODY></TABLE></BLOCKQUOTE><P><A href="http://resources.arcgis.com/en/help/main/10.1/index.html#//0154000002r6000000">http://resources.arcgis.com/en/help/main/10.1/index.html#//0154000002r6000000</A></P><P></P><P>However, if your data already has elevation values then you should use the vertical coordinate system that they were captured in. Otherwise the z values might be misleading.</P><P></P><P>Owen</P><P><A href="http://www.spatialxp.com.au/">Spatial XP</A></P></BODY></HTML> Wed, 06 Aug 2014 21:56:35 GMT https://community.esri.com/t5/arcgis-online-questions/which-vertical-coordinate-system-should-i-use-for/m-p/472363#M23793 OwenEarley 2014-08-06T21:56:35Z