A horizontal geographic transformation and vertical datum transformation cannot be applied in the same Project tool process. These operations must be performed separately unless the "case" for the two projection/transformation processes is previously defined in the hvtdefaults.json file. Since this is difficult to determine, the recommended course is to perform the projection and transformation processes in multiple steps.An input vertical datum must be defined for the data. Use the 'Define Projection' tool in ArcToolbox to define the vertical coordinate system (VCS) for 3D data.The elevation field must be a numeric field, and can be a Short or Long integer, Float, or Double.Using this tool requires a 3D Analyst license. In ArcToolbox, navigate to 3D Analyst > 3D Features > Feature To 3D By Attribute. Converting two-dimensional (2D) data with an elevation field into 3D can be accomplished with the Feature To 3D By Attribute tool.
To apply a vertical datum transformation, the input data must be three-dimensional (3D). Features must be identified as PointZ or PointZM, PolylineZ or PolylineZM, or PolygonZ or PolygonZM in the Shape field in the attribute table.How do I apply a vertical datum transformation in ArcGIS Desktop?Ĭheck the following items to facilitate applying vertical datum transformations in 10.4 and later with the ArcToolbox Project tool. FAQ: How do I apply a vertical datum transformation in ArcGIS Desktop? Question
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