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Posted to dev@lucene.apache.org by "David Smiley (JIRA)" <ji...@apache.org> on 2013/06/04 02:54:20 UTC
[jira] [Commented] (SOLR-4879) Indexing a field of type
solr.SpatialRecursivePrefixTreeFieldType fails when at least two vertexes
are more than 180 degrees apart
[ https://issues.apache.org/jira/browse/SOLR-4879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13673885#comment-13673885 ]
David Smiley commented on SOLR-4879:
------------------------------------
>From the wiki:
bq. WKT shapes must have each vertex less than 180 degrees in longitude difference than the vertex before it, or else it will be confused as going the wrong way around the globe. The only exception to this is a Polygon representing a rectangle.
So... the wiki does in fact claim the vertices need to be < 180 degrees apart. But I can see that you may have been confused from later statements about rectangles in WKT. FYI in Spatial4j's next release, even rectangles will be bound by the <180 rule and you then needn't bother ensuring that the vertex order is counter-clockwise -- it won't matter.
> Indexing a field of type solr.SpatialRecursivePrefixTreeFieldType fails when at least two vertexes are more than 180 degrees apart
> ----------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-4879
> URL: https://issues.apache.org/jira/browse/SOLR-4879
> Project: Solr
> Issue Type: Bug
> Environment: Linux, Solr 4.0.0, Solr 4.3.0
> Reporter: Øystein Torget
>
> When trying to index a field of the type solr.SpatialRecursivePrefixTreeFieldType the indexing will fail if two vertexes are more than 180 longitudal degress apart.
> For instance this polygon will fail:
> POLYGON((-161 49, 0 49, 20 49, 20 89.1, 0 89.1, -161 89.2, -161 49))
> but this will not.
> POLYGON((-160 49, 0 49, 20 49, 20 89.1, 0 89.1, -160 89.2, -160 49))
> This contradicts the documentation found here: http://wiki.apache.org/solr/SolrAdaptersForLuceneSpatial4
> The documentation states that each vertex must be less than 180 longitudal degrees apart from the previous vertex.
> Relevant parts from the schema.xml file:
> <!-- Field type for storing WTK based polygons -->
> <fieldType name="location_rpt" class="solr.SpatialRecursivePrefixTreeFieldType"
> spatialContextFactory="com.spatial4j.core.context.jts.JtsSpatialContextFactory"
> distErrPct="0.025"
> maxDistErr="0.000009"
> units="degrees"
> />
> <field name="geographic_extent" type="location_rpt" index="true" stored="true" />
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