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New function CDB_CreateOverviewsWithToleranceInPixels

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This function allows defining the previously fixed parameter grid_px.
The lim parameter used to define the reference Z level is also
correlated to this value.

Fixes #219
This commit is contained in:
Javier Goizueta
2016-04-04 19:21:10 +02:00
parent aff7ae3e2e
commit 57c32332e2
4 changed files with 55 additions and 25 deletions
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doc/CDB_Overviews.md
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@@ -48,6 +48,13 @@ CDB_CreateOverviews(table_name, ref_z_strategy, reduction_strategy)
- **base_z** integer, base Z level assigned to the base table.
- **overview_z** integer, Z level for which to generate the overview.
#### Tolerance / level of detail
The level of detail to be representable by each overview layer can
be specified as a tolerance in pixels (if different from the default of 2 pixels)
with the function `CDB_CreateOverviewsWithToleranceInPixels`
which has as a second additional argument the desired tolerance.
### CDB_Overviews
Obtain overview metadata for a given table (existing overviews).