Javier Goizueta
4580c9cd5c
Change the cartodb_ids of aggregated overviews
...
Instead of arbitrary ids, the id of one of the aggregated records
is used, so that if it is used in the UI to query point
the information of one of the records grouped at the point will be
retrieved.
2016-01-04 10:33:39 +01:00
Javier Goizueta
08828b8b7d
Set owner of overlays to the owner of the base table
2015-12-29 15:22:12 +01:00
Javier Goizueta
cecba655eb
Preserve aggregated attributes of singleton groups
2015-12-29 14:56:47 +01:00
Javier Goizueta
b34a752172
Generate overviews for all Z levels
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Skipping levels produces visually inferior results
2015-12-29 14:56:04 +01:00
Javier Goizueta
8ba9e74c4a
Order columns of aggregated overlays as in the base table
2015-12-29 13:38:07 +01:00
Javier Goizueta
6a6a5bc96a
Fix Sampling reduction to avoid RandomTids problems
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The fixed cases will not be common but do occur in tests.
This is an interim fix which should be reverted if CDB_randomTids changes.
2015-12-28 19:41:14 +01:00
Javier Goizueta
2ff686de27
Clean up: remove spurious comment
2015-12-28 19:30:20 +01:00
Javier Goizueta
07326626b7
More efficient sampling strategy
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It is also renamed properly.
2015-12-28 19:28:20 +01:00
Javier Goizueta
4afc427008
Rename Ref. Z strategy function
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It's not that *dummy* anymore, so choose a more descriptive name
2015-12-28 17:47:57 +01:00
Javier Goizueta
a8a2c04d71
Remove invalid comment
2015-12-23 14:20:57 +01:00
Javier Goizueta
a5bca7d715
Add function for post-processing new overview tables
2015-12-23 14:17:50 +01:00
Javier Goizueta
552206464e
Make strategy function public
2015-12-23 12:50:04 +01:00
Javier Goizueta
2af0b9a57f
Add function comments
2015-12-23 12:42:40 +01:00
Javier Goizueta
1b5de84c9a
Add missing attribute-aggregationto the point reduction strategy
2015-12-23 12:17:37 +01:00
Javier Goizueta
5a78ee2896
Optimize the gridded clustering strategy
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The internal grid_px parameter is adjusted for best results with default symbol size
2015-12-22 17:59:49 +01:00
Javier Goizueta
c8a1ef6f68
Slight optimization of gridded clustering
2015-12-22 15:25:21 +01:00
Rafa de la Torre
564ab75d2d
Use _cdb_estimated_extent instead of ST_Extent
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With a 3.8M points table, this was a ~30% gain in my local env.
2015-12-21 18:41:50 +01:00
Rafa de la Torre
5010109c7d
Add _cdb_estimated_extent to get the extent from stats
2015-12-21 18:41:45 +01:00
Rafa de la Torre
e60f73a31b
A bit of internal documentation
2015-12-21 13:16:57 +01:00
Javier Goizueta
415a09392f
Gridded clustering aggregation strategy for overviews
2015-12-16 17:45:36 +01:00
Javier Goizueta
e5cc9ef0bd
Fix: typo
2015-12-16 17:26:17 +01:00
Javier Goizueta
f7857945c1
Change feature density computation algorithm
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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).
2015-12-16 16:39:38 +01:00
Javier Goizueta
554464e43e
Use tile-recursive computation of feature density
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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
2015-12-16 12:14:37 +01:00
Javier Goizueta
d7c8f3d7e8
Fix: overlay generation was not using the proper scale
2015-12-15 19:13:39 +01:00
Javier Goizueta
4c85d7f3ad
Compute the reference Z level for a table
2015-12-15 19:12:48 +01:00
Javier Goizueta
d0e66910a0
Sketch for new Overview-creation functionality
2015-12-15 17:36:27 +01:00
