You can create a period of record dataset from a collection by appending each member to one another, in sequence. This function assumes that the members of your collection represents a single and complete year. This is useful for doing a statistical analysis, such as the Cyclic Analysis Function. This function also assumes you want the resulting dataset to have the same pathname parts as the collection; so, if you already have a dataset with that pathname, rename it before running this command or it will be overwritten.

  • From the DSSVue View menu, select Condensed-Group Collections.
  • Select the collection from which you want to create a period of record data
  • From the Collections menu, select Period of Record from Collection.
  • If the collection IDs do not represent years, specify a starting year for the new dataset.

Another assumption used by the Period of Record from Collection function is that each member of the collection is placed in the new POR dataset at the same time of year as the start of the collection member itself. So, if all the members of the collection only span the 6 months from 01Apr to 30Sep, then they will be placed at 01April in their designated year in the POR dataset and the other 6 months of will be "missing" in each year of the POR. But, if all the members of the collection span 15 months, when the data of each member is placed at the same start date of each year, 3 months of each collection member will be overwritten by the next member when it is written to the POR dataset.