Rafa de la Torre
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564ab75d2d
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Use _cdb_estimated_extent instead of ST_Extent
With a 3.8M points table, this was a ~30% gain in my local env.
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2015-12-21 18:41:50 +01:00 |
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Rafa de la Torre
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5010109c7d
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Add _cdb_estimated_extent to get the extent from stats
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2015-12-21 18:41:45 +01:00 |
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Rafa de la Torre
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e60f73a31b
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A bit of internal documentation
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2015-12-21 13:16:57 +01:00 |
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Javier Goizueta
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415a09392f
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Gridded clustering aggregation strategy for overviews
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2015-12-16 17:45:36 +01:00 |
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Javier Goizueta
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e5cc9ef0bd
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Fix: typo
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2015-12-16 17:26:17 +01:00 |
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Javier Goizueta
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f7857945c1
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Change feature density computation algorithm
Now parameterize by the number of levels to traverse and
start with the level that covers the extent of the table
with at least N*N tiles (N=4).
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2015-12-16 16:39:38 +01:00 |
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Javier Goizueta
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554464e43e
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Use tile-recursive computation of feature density
This is a more adaptive way of estimating the feature density to
determine the base Z level.
Applying technique from http://javisantana.com/2014/10/22/traversing-quadtree.html
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2015-12-16 12:14:37 +01:00 |
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Javier Goizueta
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d7c8f3d7e8
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Fix: overlay generation was not using the proper scale
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2015-12-15 19:13:39 +01:00 |
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Javier Goizueta
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4c85d7f3ad
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Compute the reference Z level for a table
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2015-12-15 19:12:48 +01:00 |
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Javier Goizueta
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d0e66910a0
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Sketch for new Overview-creation functionality
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2015-12-15 17:36:27 +01:00 |
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