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Synopsis
rtree-build [-d dimension] [-f format] [-h ] [-n nodes] [-o file]
[-s strategy] [-v ] [-V ] [file]
DESCRIPTION
The rtree-build program reads CSV files specifying a collection of rectangles, cuboids or higher-dimensional hyperectangles and writes a serialised R-tree to output. Such R-trees can be loaded quickly into programs using librtree.
OPTIONS
-d,--dimensiondimension-
Specify the
dimensionof the R-tree to build. -f,--formatformat-
Specify the
formatof the output, one ofjsonorbsrt. See rtree-json (5) and rtree-bsrt (5) for descriptions of these formats.If this option is not given, then
jsonwill be taken as the default. -h,--help-
List the program options.
-n,--nodes-per-pagenodes-
Specify the number of
nodes(understood to include their branches) in a page of memory. This parameter can affect performance quite dramatically, a value of eight will result in a build which is better than twice as fast as a value of one (for dimension two on AMD64 at least). But a value which is too large will result in a branching factor less than two, which is infeasible for a tree: In this case the program will error.A value of zero is permitted (and the default), in this case the program will choose a value which has been determined to work well. The value chosen will probably change between versions, so if stability of output is important to you, then some manual experimentation and a fixed value is advised.
-o,--outputfile-
Write the output to
file, rather thanstdout. -s,--splitstrategy-
Specify the splitting
strategy, one oflinear,quadratic(the default) orgreene.The
linearstrategy is the fastest to build but will generally result in slower queries than thequadraticorgreenestrategies. -v,--verbose-
Verbose operation.
-V,--version-
Version information.