[jira] [Commented] (SOLR-2155) Geospatial search using geohash prefixes
[
https://issues.apache.org/jira/browse/SOLR-2155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13274546#comment-13274546
]
Oleg Shevelyov commented on SOLR-2155:
--
Hi David! Thanks for your quick response. At the moment I decided to go for
JTeam's Spatial Solr Plugin (SSP 2.0) which has a patch with polygon search.
The project looks well-documented and it seems faster to apply their stuff than
modify 2155 sources. If tests show it doesn't work well, I'll get back to 2155
and let you know. Thank you anyway.
Geospatial search using geohash prefixes
Key: SOLR-2155
URL: https://issues.apache.org/jira/browse/SOLR-2155
Project: Solr
Issue Type: Improvement
Reporter: David Smiley
Assignee: David Smiley
Attachments: GeoHashPrefixFilter.patch, GeoHashPrefixFilter.patch,
GeoHashPrefixFilter.patch,
SOLR-2155_GeoHashPrefixFilter_with_sorting_no_poly.patch, SOLR.2155.p3.patch,
SOLR.2155.p3tests.patch, Solr2155-1.0.2-project.zip,
Solr2155-1.0.3-project.zip, Solr2155-1.0.4-project.zip,
Solr2155-for-1.0.2-3.x-port.patch
{panel:title=NOTICE} The status of this issue is a plugin for Solr 3.x
located here: https://github.com/dsmiley/SOLR-2155. Look at the introductory
readme and download the plugin .jar file. Lucene 4's new spatial module is
largely based on this code. The Solr 4 glue for it should come very soon but
as of this writing it's hosted temporarily at https://github.com/spatial4j.
For more information on using SOLR-2155 with Solr 3, see
http://wiki.apache.org/solr/SpatialSearch#SOLR-2155 This JIRA issue is
closed because it won't be committed in its current form.
{panel}
There currently isn't a solution in Solr for doing geospatial filtering on
documents that have a variable number of points. This scenario occurs when
there is location extraction (i.e. via a gazateer) occurring on free text.
None, one, or many geospatial locations might be extracted from any given
document and users want to limit their search results to those occurring in a
user-specified area.
I've implemented this by furthering the GeoHash based work in Lucene/Solr
with a geohash prefix based filter. A geohash refers to a lat-lon box on the
earth. Each successive character added further subdivides the box into a 4x8
(or 8x4 depending on the even/odd length of the geohash) grid. The first
step in this scheme is figuring out which geohash grid squares cover the
user's search query. I've added various extra methods to GeoHashUtils (and
added tests) to assist in this purpose. The next step is an actual Lucene
Filter, GeoHashPrefixFilter, that uses these geohash prefixes in
TermsEnum.seek() to skip to relevant grid squares in the index. Once a
matching geohash grid is found, the points therein are compared against the
user's query to see if it matches. I created an abstraction GeoShape
extended by subclasses named PointDistance... and CartesianBox to support
different queried shapes so that the filter need not care about these details.
This work was presented at LuceneRevolution in Boston on October 8th.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
-
To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org
For additional commands, e-mail: dev-h...@lucene.apache.org
[jira] [Commented] (SOLR-2155) Geospatial search using geohash prefixes
[
https://issues.apache.org/jira/browse/SOLR-2155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13273417#comment-13273417
]
Oleg Shevelyov commented on SOLR-2155:
--
Hi David, does new 1.0.5 version include polygon search? If not, please, could
you clarify where to apply GeoHashPrefixFilter patch? It doesn't match solr 3.1
sources, and obviously higher versions as well. I saw you mentioned that you
successfully implemented polygon search but I still don't get how to make it
work. Thanks
Geospatial search using geohash prefixes
Key: SOLR-2155
URL: https://issues.apache.org/jira/browse/SOLR-2155
Project: Solr
Issue Type: Improvement
Reporter: David Smiley
Assignee: David Smiley
Attachments: GeoHashPrefixFilter.patch, GeoHashPrefixFilter.patch,
GeoHashPrefixFilter.patch,
SOLR-2155_GeoHashPrefixFilter_with_sorting_no_poly.patch, SOLR.2155.p3.patch,
SOLR.2155.p3tests.patch, Solr2155-1.0.2-project.zip,
Solr2155-1.0.3-project.zip, Solr2155-1.0.4-project.zip,
Solr2155-for-1.0.2-3.x-port.patch
{panel:title=NOTICE} The status of this issue is a plugin for Solr 3.x
located here: https://github.com/dsmiley/SOLR-2155. Look at the introductory
readme and download the plugin .jar file. Lucene 4's new spatial module is
largely based on this code. The Solr 4 glue for it should come very soon but
as of this writing it's hosted temporarily at https://github.com/spatial4j.
For more information on using SOLR-2155 with Solr 3, see
http://wiki.apache.org/solr/SpatialSearch#SOLR-2155 This JIRA issue is
closed because it won't be committed in its current form.
{panel}
There currently isn't a solution in Solr for doing geospatial filtering on
documents that have a variable number of points. This scenario occurs when
there is location extraction (i.e. via a gazateer) occurring on free text.
None, one, or many geospatial locations might be extracted from any given
document and users want to limit their search results to those occurring in a
user-specified area.
I've implemented this by furthering the GeoHash based work in Lucene/Solr
with a geohash prefix based filter. A geohash refers to a lat-lon box on the
earth. Each successive character added further subdivides the box into a 4x8
(or 8x4 depending on the even/odd length of the geohash) grid. The first
step in this scheme is figuring out which geohash grid squares cover the
user's search query. I've added various extra methods to GeoHashUtils (and
added tests) to assist in this purpose. The next step is an actual Lucene
Filter, GeoHashPrefixFilter, that uses these geohash prefixes in
TermsEnum.seek() to skip to relevant grid squares in the index. Once a
matching geohash grid is found, the points therein are compared against the
user's query to see if it matches. I created an abstraction GeoShape
extended by subclasses named PointDistance... and CartesianBox to support
different queried shapes so that the filter need not care about these details.
This work was presented at LuceneRevolution in Boston on October 8th.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
-
To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org
For additional commands, e-mail: dev-h...@lucene.apache.org
