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Posted to dev@sdap.apache.org by GitBox <gi...@apache.org> on 2018/09/07 19:37:36 UTC

[GitHub] jjacob7734 opened a new pull request #28: SDAP-50 Fix incorrect Hovmoller Implementation

jjacob7734 opened a new pull request #28: SDAP-50 Fix incorrect Hovmoller Implementation
URL: https://github.com/apache/incubator-sdap-nexus/pull/28
 
 
   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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