- 专利标题: SPATIAL PREDICATES EVALUATION ON GEOHASH-ENCODED GEOGRAPHICAL REGIONS
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申请号: US16361850申请日: 2019-03-22
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公开(公告)号: US20190235835A1公开(公告)日: 2019-08-01
- 发明人: Sameh W. Asaad , Dajung Lee , Roger Moussalli , Mudhakar Srivatsa
- 申请人: International Business Machines Corporation
- 主分类号: G06F7/02
- IPC分类号: G06F7/02 ; G06F16/29
摘要:
A method of performing an evaluation of a spatial predicates for first and second regions includes receiving a first set of geohashes representing the first region, and receiving a second set of geohashes representing the second region. The method also includes for each geohash within the first set of geohashes: performing a respective pairwise evaluation of a first spatial primitive for the geohash within the first set and each of the geohashes within the second set to produce a set of first binary results corresponding to respective ones of the geohashes within the second set; and combining the set of first binary results using a first Boolean logic operator to produce one of a set of second binary results corresponding to respective ones of the geohashes within the first set. The method further includes combining the set of second binary results using a second Boolean logic operator to produce a third binary result corresponding to the first set of spatial primitives.
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