Using the ExtData component: Difference between revisions

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==== Climatologies ====

Sometimes data represents a yearly climatology. ExtData ~~currently only~~ supports 12 month climatologies, i.e. one time per month. If the climatology keyword is set to yes you are telling ExtData that you have a file with 12 times spanning at year or 12 files, one per month. In either case ExtData does not use the application clock's year but replaces it with the year in the file for interpolation and wraps the data around at the end of the year.

Sometimes data represents a yearly climatology in that you have data that spans a year and you want ExtData to recycle this year of data. ExtData supports 12 month climatologies, i.e. one time per month. If the climatology keyword is set to yes you are telling ExtData that you have a file with 12 times spanning at year or 12 files, one per month. In either case ExtData does not use the application clock's year but replaces it with the year in the file for interpolation and wraps the data around at the end of the year.

Note in Heracles-5_4 onward this has been expanded so that you can have a climatological data set that is not just 12 timesteps. For example, suppose you had several years of daily files and you wanted to use one particular year. You can now specify a year in the keyword telling it to use that year for the interpolation. Essentially it replaces the clock year with the year you specify and correctly wraps back to the first piece of data in the year when you cross into the new year.

==== Constant Files ====

Occasionally the user might want to satisfy a variable with a data set that is constant (not in the sense that you want to set the import to the same value but you have some geospatial data with only one time on a file that has no tokens) and should not be time interpolated. If the user specifies "-" for the refresh template (update once), ExtData finds that the file template has no tokens, and that the file itself only has one time, ExtData will note this and update the variable once with this set of data.

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 ==== Climatologies ====
-Sometimes data represents a yearly climatology. ExtData currently only supports 12 month climatologies, i.e. one time per month. If the climatology keyword is set to yes you are telling ExtData that you have a file with 12 times spanning at year or 12 files, one per month. In either case ExtData does not use the application clock's year but replaces it with the year in the file for interpolation and wraps the data around at the end of the year.
+Sometimes data represents a yearly climatology in that you have data that spans a year and you want ExtData to recycle this year of data. ExtData  supports 12 month climatologies, i.e. one time per month. If the climatology keyword is set to yes you are telling ExtData that you have a file with 12 times spanning at year or 12 files, one per month. In either case ExtData does not use the application clock's year but replaces it with the year in the file for interpolation and wraps the data around at the end of the year.
+Note in Heracles-5_4 onward this has been expanded so that you can have a climatological data set that is not just 12 timesteps. For example, suppose you had several years of daily files and you wanted to use one particular year. You can now specify a year in the keyword telling it to use that year for the interpolation. Essentially it replaces the clock year with the year you specify and correctly wraps back to the first piece of data in the year when you cross into the new year.
 ==== Constant Files ====
 Occasionally the user might want to satisfy a variable with a data set that is constant (not in the sense that you want to set the import to the same value but you have some geospatial data with only one time on a file that has no tokens) and should not be time interpolated. If the user specifies "-" for the refresh template (update once), ExtData finds that the file template has no tokens, and that the file itself only has one time, ExtData will note this and update the variable once with this set of data.