Extra Data Fields for Track or Event Records
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Note that if you select either the UniSys or the NEIC types, then the extra data fields will be automatically filled in with pre-defined values which are required for these data sources, and you will not be able to alter them. These extra data fields are as follows.
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UniSys Hurricanes – Intensity (Numeric), Wind (Numeric), Pressure (Numeric), Description (List of Items) |
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NEIC Earthquakes – Richter (Numeric), Depth (Numeric), Data Source (List of Items) |
If you are selecting a user-defined track or event type, then you will be able to enter or edit your own extra data fields if you wish. These extra data fields are useful for storing information about events which is not plotted on the maps, but which can be previewed when selecting individual tracks or events to display on a map. For example, if you wish to create a collection of volcanic eruptions, then you could add extra fields to store information such as magnitude and duration of the eruption and number of deaths. If you are creating a track collection of sunken ship’s courses, then you could add extra fields to store information on size of ship, number of passengers, number lost at sea etc.
Note that it is not obligatory to enter any of this data for every event, so you can freely define additional fields which may apply only to some events.
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To add a new extra data field |
Click on the “New Field…” button.
This will add a new field (labelled “New Field”) to the list of fields on the left. You can then alter its name and type in the two boxes to the right.
The available types are as follows.
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Free Text – This is an unrestricted type, allowing entry of anything, including free text, such as notes or comments. |
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List of Items – This is a textual type. Every new item that you enter is added to a list, and when you add new events, you have the option of selecting an item from this list, or creating a new item to add to the list. For example, you might have a field which describes the effects of flooding, with a list of items including “Light”, “Moderate”, “Heavy”, and “Severe”. |
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Numeric – This allows the entry only of numeric data. |
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To edit an extra data field |
Highlight the extra field name in the list of extra fields.
Edit the name or type in the boxes to the right.
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To delete an extra data field |
Highlight the extra field name in the list of extra fields.
Click on the “Delete” button.