![]() The coordinate system of the Data Frame is adopted from the first data added to the new Data Frame. Go to View > Data Frame Properties > Coordinate System tab, and verify that a Current Coordinate System is set for the Data Frame.The following are suggestions for troubleshooting the cause of data alignment problems in ArcMap. If the proper geographic (datum) transformation is not specified, the data will not line up properly with other data displayed in the map document.If the coordinate system definition is incorrect, or.If there is no coordinate system associated with the data, or.When displaying multiple datasets with different coordinate systems, ArcMap will project the data 'on-the-fly' to the coordinate system that is set for the Data Frame: When adding data to ArcMap, the application reads the coordinate system (projection) information stored with the dataset. ![]() ![]() Problem: Datasets do not line up when added to ArcMap DescriptionĪfter adding several datasets to an ArcMap Data Frame, features in some layers do not align correctly with other layers.
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