1Tree::R(3)            User Contributed Perl Documentation           Tree::R(3)
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NAME

6       Tree::R - Perl extension for the R-tree data structure and algorithms
7

SYNOPSIS

9         use Tree::R;
10
11         my $rtree = Tree::R->new
12
13         for my $object (@objects) {
14             my @bbox = $object->bbox(); # (minx,miny,maxx,maxy)
15             $rtree->insert($object,@bbox);
16         }
17
18         my @point = (123, 456); # (x,y)
19         my @results;
20         $rtree->query_point(@point,\@results);
21         for my $object (@results) {
22             # point is in object's bounding box
23         }
24
25         my @rect = (123, 456, 789, 1234); # (minx,miny,maxx,maxy)
26         @results = ();
27         $rtree->query_completely_within_rect(@rect,\@results);
28         for my $object (@results) {
29             # object is within rectangle
30         }
31
32         @results = ();
33         $rtree->query_partly_within_rect(@rect,\@results);
34         for my $object (@results) {
35             # object's bounding box and rectangle overlap
36         }
37

DESCRIPTION

39       R-tree is a data structure for storing and indexing and efficiently
40       looking up non-zero-size spatial objects.
41
42   EXPORT
43       None by default.
44

SEE ALSO

46       A. Guttman: R-trees: a dynamic index structure for spatial indexing.
47       ACM SIGMOD'84, Proc. of Annual Meeting (1984), 47--57.
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49       N. Beckmann, H.-P. Kriegel, R. Schneider & B. Seeger: The R*-tree: an
50       efficient and robust access method for points and rectangles. Proc. of
51       the 1990 ACM SIGMOD Internat. Conf. on Management of Data (1990),
52       322--331.
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54       The homepage of this module is on github:
55       https://github.com/ajolma/Tree-R
56

AUTHOR

58       Ari Jolma
59

61       Copyright (C) 2005- by Ari Jolma
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63       This library is free software; you can redistribute it and/or modify it
64       under the terms of The Artistic License 2.0.
65

REPOSITORY

67       <https://github.com/ajolma/Tree-R>
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71perl v5.28.0                      2015-09-14                        Tree::R(3)
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