How to identify the data not actually matching the spatial reference?

Discussion created by huangs3 on Apr 9, 2013
Latest reply on Apr 16, 2013 by huangs3
Hi Everybody:

    I am making a data manipulation tool to handle some WGS84 data.
    There is some data with "fake" WGS84 spatial reference, which means: when I use ArcCatalog to look at the property of the datasets and feature classes, it shows WGS84. However, the underlying data is actually NAD83. The tool I developed will not give correct result with this kind of data. How can I identify these kind of data? I want to put some data validation logic to the tool to reject this data. Any idea>
    Thank you!