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| + !!Usecase #5 - GENERATE Match-up Data Set -- Alternate |
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| + __Version:__ 1.0\\ |
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| + __Summary:__\\ |
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| + A match-up data set is obtained from the target data set and the comparison data sets. This data set consists of match-up data elements which consist of N+2 parts where N is 1 for point and line data sets and >1 for multiple field data sets (for example if there are 4 satellite-derived SST fields, on field of interpolated SST values and 3 model output fields, N would be 8): SST values and associated locational metadata for the target data set, SST values and associated locational metadata for N comparison data set (for some data comparison data sets, this will consist of one SST value and its location in space and time) and metadata further characterizing the match-up element such as the URL or name for the comparison data set, a match-up element sequence number, a space and time value for the element, etc. |
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| + *__Input:__ The list of data sets identified by Use Case #2. |
| + *__Output:__ Match-up data set ==> input for the comparison use case (Use Case #4). |
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| + __Preconditions:__\\ |
| + __\\ |
| + __Triggers:__\\ |
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| + __Basic course of events:__ |
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| + #Provide match-up search parameters: |
| + - Co-location (space and time) search radius to identify matchup\\ |
| + - Target data set buffer size -- size of the sub-array of the target data set to be returned as part of matchup element\\ |
| + - Comparison data set buffer size -- size of the sub-array of the comparison data set to be returned\\ |
| + - List of comparison data sets to be sampled at the same locations\\ |
| + #Build Matchup elements (iterate over comparison data objects and comparison data sets) |
| + - determine match-up (space-time) location \\ |
| + - acquire target data set subset (data cube) extracted from the target data set\\ |
| + - acquire a comparison data set subset (one that meets the match-up criteria) for each of the N-2 comparison data sets to be sampled\\ |
| + - add additional metadata as needed\\ |
| + - package these data into a match-up element \\ |
| + #Construct integrated data set of match-up elements, and archive the result set |
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| + __Alternative paths:__\\ |
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| + __Postconditions:__\\ |
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| + __Business rules:__\\ |
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| + __Notes:__\\ |
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| + __Author and date -__ SST Use Case Development Group 25 July 2007. |
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