From a68ccc42ee174ecfce37a3dcd18bc2d0fb9f0641 Mon Sep 17 00:00:00 2001
From: jirik <jirik@users.noreply.github.com>
Date: Fri, 19 May 2017 16:30:52 +0200
Subject: [PATCH] Adjust zres values for buildings,landcover and landuse

Decrease size of Belgium Z0-12 mbtiles from 63 MB to 38 MB
---
 layers/building/mapping.yaml  |  2 +-
 layers/landcover/mapping.yaml | 12 ++++++------
 layers/landuse/mapping.yaml   | 10 +++++-----
 3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/layers/building/mapping.yaml b/layers/building/mapping.yaml
index 89a8802..0930055 100644
--- a/layers/building/mapping.yaml
+++ b/layers/building/mapping.yaml
@@ -5,7 +5,7 @@ generalized_tables:
   # etldoc: imposm3 -> osm_building_polygon_gen1
   building_polygon_gen1:
     source: building_polygon
-    sql_filter: area>power(ZRES13,2)
+    sql_filter: area>power(ZRES12,2)
     tolerance: ZRES13
 
 tables:
diff --git a/layers/landcover/mapping.yaml b/layers/landcover/mapping.yaml
index e1c9c10..00b0c3b 100644
--- a/layers/landcover/mapping.yaml
+++ b/layers/landcover/mapping.yaml
@@ -4,37 +4,37 @@ generalized_tables:
   # etldoc: imposm3 -> osm_landcover_polygon_gen6
   landcover_polygon_gen6:
     source: landcover_polygon_gen5
-    sql_filter: area>power(ZRES8,2)
+    sql_filter: area>power(ZRES6,2)
     tolerance: ZRES8
 
   # etldoc: imposm3 -> osm_landcover_polygon_gen5
   landcover_polygon_gen5:
     source: landcover_polygon_gen4
-    sql_filter: area>power(ZRES9,2)
+    sql_filter: area>power(ZRES7,2)
     tolerance: ZRES9
 
   # etldoc: imposm3 -> osm_landcover_polygon_gen4
   landcover_polygon_gen4:
     source: landcover_polygon_gen3
-    sql_filter: area>power(ZRES10,2)
+    sql_filter: area>power(ZRES8,2)
     tolerance: ZRES10
 
   # etldoc: imposm3 -> osm_landcover_polygon_gen3
   landcover_polygon_gen3:
     source: landcover_polygon_gen2
-    sql_filter: area>power(ZRES11,2)
+    sql_filter: area>power(ZRES8,2)
     tolerance: ZRES11
 
   # etldoc: imposm3 -> osm_landcover_polygon_gen2
   landcover_polygon_gen2:
     source: landcover_polygon_gen1
-    sql_filter: area>power(ZRES12,2)
+    sql_filter: area>power(ZRES9,2)
     tolerance: ZRES12
 
   # etldoc: imposm3 -> osm_landcover_polygon_gen1
   landcover_polygon_gen1:
     source: landcover_polygon
-    sql_filter: area>power(ZRES13,2)
+    sql_filter: area>power(ZRES10,2)
     tolerance: ZRES13
 
 tables:
diff --git a/layers/landuse/mapping.yaml b/layers/landuse/mapping.yaml
index 8dc90e1..b151b0b 100644
--- a/layers/landuse/mapping.yaml
+++ b/layers/landuse/mapping.yaml
@@ -2,27 +2,27 @@ generalized_tables:
   # etldoc: imposm3 -> osm_landuse_polygon_gen5
   landuse_polygon_gen5:
     source: landuse_polygon_gen4
-    sql_filter: area>power(ZRES9,2)
+    sql_filter: area>power(ZRES7,2)
     tolerance: ZRES9
   # etldoc: imposm3 -> osm_landuse_polygon_gen4
   landuse_polygon_gen4:
     source: landuse_polygon_gen3
-    sql_filter: area>power(ZRES10,2)
+    sql_filter: area>power(ZRES8,2)
     tolerance: ZRES10
   # etldoc: imposm3 -> osm_landuse_polygon_gen3
   landuse_polygon_gen3:
     source: landuse_polygon_gen2
-    sql_filter: area>power(ZRES11,2)
+    sql_filter: area>power(ZRES9,2)
     tolerance: ZRES11
   # etldoc: imposm3 -> osm_landuse_polygon_gen2
   landuse_polygon_gen2:
     source: landuse_polygon_gen1
-    sql_filter: area>power(ZRES12,2)
+    sql_filter: area>power(ZRES10,2)
     tolerance: ZRES12
   # etldoc: imposm3 -> osm_landuse_polygon_gen1
   landuse_polygon_gen1:
     source: landuse_polygon
-    sql_filter: area>power(ZRES13,2)
+    sql_filter: area>power(ZRES11,2)
     tolerance: ZRES13
 
 tables: