The time properties of your temporal data can be set using the information stored in the data source. The temporal information can be stored in attribute fields for feature classes or mosaic datasets. However, for specialized temporal data, such as netCDF, the time information is stored natively.
The time properties available for the layer vary depending on the dataset. For feature classes and mosaic datasets, you have the option to specify one field (time field) or two fields (a start time field and, optionally, an end time field). However, for netCDF feature layers, you can choose to specify either a time dimension or the attribute fields containing the time values. For netCDF raster layers, you can only specify the time dimension that allows you to visualize data over time.
- Double-click the temporal dataset in the Contents pane to open the Layer Properties dialog box.
- Click Time.
- Set Layer Time. Choose from one of the following options:
Use this option if you want to disable time for the layer.
Each feature has a single time field.
Use this option if the time stamps are stored in a single attribute field. In this case, the feature exists at an instant in time.
Each feature has a start and end time field.
Use this option if the feature has a start and end time stored in two separate fields. In this case, the feature exists for a certain duration in time.
Setting the end time field value is also useful if the time steps in your data are irregularly spaced. Learn more about irregularly spaced data.
Layer has time as a dimension.
Use this option if time is a dimension in the multidimensional dataset. This option is only available for netCDF feature layers and netCDF raster layers.
- For Layer Time based on a single field, set Time Field to the field that contains the time information.
- For Layer Time based on values stored in two fields, set Start Time Field and End Time Field to the corresponding fields that contain the start and end times.
- For Layer Time based on a time dimension, set Time Dimension to the appropriate dimension.
- When you select the field if its field type is string or numeric we will try to determine the best Time Format to use based on the time stamps in the field. You may also manually select the appropriate Time Format for the field.
- By default, the time extent of the data will be calculated as soon as you select a field. If the data is large, it is possible that only a sampling of the data will be used to determine the time extent. In this case you will see a warning icon next to the Calculate button. Hover over the icon to read the message about the situation. If you want to calculate the full time extent using all the rows in the table, click Calculate. Alternatively you may manually enter the time extent for the layer.
- If the time extent is empty it likely means that the time field did not contain any valid time stamps. If you are expecting the field to contain valid time stamps investigate your data and specifically for string or numeric fields verify that the time stamps are stored in one of the supported time formats.
- If your data changes frequently because of constant edits or updates outside of the application, check Data is a live feed and should be refreshed periodically. If this is checked, the time extent of the layer will be recalculated during the session to provide a more accurate representation of the full extent of the data.
- Optionally, you can set a Time offset value for your data. This allows you to align and visualize multiple temporal datasets through time.