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From GitBox <...@apache.org>
Subject [GitHub] jjacob7734 opened a new pull request #27: SDAP-50 Fix incorrect Hovmoller Implementation
Date Fri, 07 Sep 2018 19:32:34 GMT
jjacob7734 opened a new pull request #27: SDAP-50 Fix incorrect Hovmoller Implementation
URL: https://github.com/apache/incubator-sdap-nexus/pull/27
 
 
   This fixes several problems with the Spark Hovmoller Map algorithms: 
   (1) Currently the Hovmoller calculation is averaging latitudes or longitudes within individual
tiles. However, depending on the search domain, unique lats/lons can be in multiple tiles.
   (2) A time stamp can appear multiple times in the JSON response
   (3) Lack of cos(lat) weighting when averaging over latitude
   
   Note that the non-Spark Hovmoller algorithms have these same problems, but are considered
deprecated and have not been fixed in this pull request.

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