A layer in your document is using the NetCDF data format as a data source, which can perform slowly in some situations.
Check the drawing performance for your layer or basemap layer in ArcMap. If you are publishing, check the drawing performance for your service in the Preview window.
- If you see the need to make changes, convert your data source to a file geodatabase or enterprise geodatabase.
NetCDF is an open standard for the sharing of array-based data and is primarily used in the climatology, meteorology, and oceanography disciplines. NetCDF is a flexible format that is well suited for the distribution of multidimensional data sources, but it is not optimized for draw performance. For instance, NetCDF data drawn as a raster dataset does not draw via pyramids. When NetCDF data is drawn as a vector data source, the vector data does not have a spatial index resulting in decreased performance. For faster performance, consider converting your data to a spatial data source such as a file geodatabase or enterprise geodatabase.