which vertical coordinate system should I use for arcgis online

[AllisonHoff]

I would like to add a layer to arcGIS online that has vertical coordinates. Which coordinate system and projection should I use?

[OwenEarley · Accepted solution]

Hi Allison,

ArcGIS Online uses the WGS 1984 Web Mercator (auxiliary sphere) coordinate system:

When designing your map, use the WGS 1984 Web Mercator (auxiliary sphere) coordinate system, which is the same coordinate system used by ArcGIS Online, Google Maps, and Bing Maps.

http://resources.arcgis.com/en/help/main/10.1/index.html#//0154000002r6000000

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.

Owen

Spatial XP