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https://issues.apache.org/jira/browse/SDAP-50?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16607572#comment-16607572
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ASF GitHub Bot commented on SDAP-50:
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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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> Fix incorrect Hovmoller Implementation
> --------------------------------------
>
> Key: SDAP-50
> URL: https://issues.apache.org/jira/browse/SDAP-50
> Project: Apache Science Data Analytics Platform
> Issue Type: Bug
> Components: nexus
> Reporter: Frank Greguska
> Assignee: Joseph Jacob
> Priority: Major
> Fix For: 0.1
>
>
> 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.
> The algorithm needs to be updated to average all unique (time, lat) or (time,
> lon) values regardless of tiles.
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