What version of KML can be displayed in ArcGIS?
Display support for KML in ArcGIS cannot be described as a KML version number. Given that many KML tags introduced in KML 2.0 are still present in KML 2.1 and KML 2.2, it is possible to have a KML file with a 2.2 header that contains only tags that were released with KML 2.0 or 2.1. In these cases, ArcGIS may fully support the display of a KML 2.2 file. Some key KML items supported for display include geometry (points, lines, polygons), ground overlays, network links, feature symbology, LookAt positions, screen overlays, COLLADA files, radio button folders, regions, and nested folders. Examples of KML items not yet supported for display include photo overlays, balloon styles, and time spans (animations). Furthermore, there is currently no support for any of the more than 20 new tags included in KML 2.2. For example, ArcGIS does not support display of the improved schema tags or photo overlays. All unsupported tags are simply ignored when reading the KML. This means that KML files with
