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https://issues.apache.org/jira/browse/LUCENE-5056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13683606#comment-13683606
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David Smiley commented on LUCENE-5056:
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The WKT spec says counter-clockwise order for the outer shell, and Spatial4j
demands that for rectangles expressed as polygons. A lot of software
(OpenLayers, JTS, PostGIS) doesn't care and lets you do it however you want,
even though technically the shape is ambiguous (which part of the ring is the
inside vs the outside?). This is in the FAQ on Solr's wiki. In the next
version of Spatial4j I'll make it support both.
> Indexing non-point shapes close to the poles doesn't scale
> ----------------------------------------------------------
>
> Key: LUCENE-5056
> URL: https://issues.apache.org/jira/browse/LUCENE-5056
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/spatial
> Affects Versions: 4.3
> Reporter: Hal Deadman
> Attachments: indexed circle close to the pole.png
>
>
> From: [~hdeadman]
> We are seeing an issue where certain shapes are causing Solr to use up all
> available heap space when a record with one of those shapes is indexed. We
> were indexing polygons where we had the points going clockwise instead of
> counter-clockwise and the shape would be so large that we would run out of
> memory. We fixed those shapes but we are seeing this circle eat up about
> 700MB of memory before we get an OutOfMemory error (heap space) with a 1GB
> JVM heap.
> Circle(3.0 90 d=0.0499542757922153)
> Google Earth can't plot that circle either, maybe it is invalid or too close
> to the north pole due to the latitude of 90, but it would be nice if there
> was a way for shapes to be validated before they cause an OOM error.
> The objects (4.5 million) are all GeohashPrefixTree$GhCell objects in an
> ArrayList owned by PrefixTreeStrategy$CellTokenStream.
> Is there anyway to have a max number of cells in a shape before it is
> considered too large and is not indexed? Is there a geo library that could
> validate the shape as being reasonably sized and bounded before it is
> processed?
> We are currently using Solr 4.1.
> <fieldType name="location_rpt"
> class="solr.SpatialRecursivePrefixTreeFieldType"
> spatialContextFactory="com.spatial4j.core.context.jts.JtsSpatialContextFactory"
> geo="true" distErrPct="0.025" maxDistErr="0.000009" units="degrees" />
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