Hi

Here is a patch to change some TYPE element numbers in
default/polygons:

Changes are:

0x17, which shows as "Park" in green, is currently used for these OSM
objects:
park, playground, common, garden, greenfield, meadow, grass,
village_green, square/plaza
Keep this mapping for leisure=park, playground
Use 0x15 for landuse=village_green
Use 0x1c for landuse=meadow, grass, greenfield, farmland
Use 0x1d for leisure=common
Use 0x20 for leisure=garden
Use 0x25 for square/plaza

Use 0x26 instead of 0x10 for landuse=farmyard
0x26 was unused. 0x10 is used landuse=residential
Use 0x26 instead of 0x4e for landuse=farm

Use 0x12 instead of 0x08 for landuse=retail
0x12 was unused. 0x08 is "Shopping Center" 

Use 0x12 instead of 0x05 for highway=services 
ie consider it a retail area - it normally includes shops, parking,
fuel, eating places etc and isn't just a "Parking Lot". Someone
suggested this change a few months ago but I can't remember who. 

Use 0x22 instead of 0x1e for historic=...
0x22 was unused. 0x1e is "Park"

add natural=tundra [0x52 resolution 18]
This is a standard Garmin type

add natural=beach | natural=sand [0x53 resolution 20] 
This is Garmin type, sometimes labeled "Flat" or Sandbank,tidal/mud
flat and the change was suggested by Nick / Minko on 27-Sep-2018

Use 0x0f instead of 0x0c for landuse=commercial
0x0f was unused. 0x0c is "Industrial Complex"

Use 0x11 instead of 0x04 for military=danger_area
This often covers a large area of other mixed use, and rendering it
with partially transparent is much more informative

Use 0x23 instead of 0x13 for amenity=...
Use 0x24 instead of 0x13 for man_made=...
0x23 & 0x24 were unused. 0x13 is now just used for building

Use 0x21 instead of 0x1f for tourism=...
0x21 was unused. 0x1f is "Park"

Regards
Ticker
Index: resources/styles/default/polygons
===================================================================
--- resources/styles/default/polygons	(revision 4265)
+++ resources/styles/default/polygons	(working copy)
@@ -37,8 +37,8 @@
 healthcare=hospital | amenity=hospital | amenity=clinic [0x0b resolution 22]
 healthcare=* | amenity=dentist | amenity=doctors | amenity=nursing_home [0x0b resolution 23]
 
-leisure=common [0x17 resolution 21]
-leisure=garden [0x17 resolution 21]
+leisure=common [0x1d resolution 21]
+leisure=garden [0x20 resolution 21]
 leisure=golf_course [0x18 resolution 21]
 leisure=ice_rink [0x19 resolution 22]
 leisure=nature_reserve [0x16 resolution 19]
@@ -57,18 +57,18 @@
 shop=* {add name='${shop|subst:"_=> "}'} [0x08 resolution 22]
 
 # squares and plazas
-place=square [0x17 resolution 22]
-highway=pedestrian & (area=yes | mkgmap:mp_created=true) [0x17 resolution 22]
+place=square [0x25 resolution 22]
+highway=pedestrian & (area=yes | mkgmap:mp_created=true) [0x25 resolution 22]
 # following rule also renders a closed way without area attribute as a plaza
-highway=pedestrian & area!=no [0x17 resolution 22]
+highway=pedestrian & area!=no [0x25 resolution 22]
 
 # footways areas are similar, but should be explicity marked as such
-highway=footway & area=yes [0x17 resolution 24]
+highway=footway & area=yes [0x25 resolution 24]
 
-# other highways that have area=yes are probably parking lots, eg services/rest_area
-(highway=services | highway=rest_area) & area!=no [0x05 resolution 22]
+highway=services [0x12 resolution 22]  # service station complex; show as retail
+highway=rest_area & area!=no [0x05 resolution 22]  # show as parking lot
 
-historic=* & historic!=no & historic!=yes & boundary!=* {add name='${historic|subst:"_=> "}'} [0x1e resolution 21]
+historic=* & historic!=no & historic!=yes & boundary!=* {add name='${historic|subst:"_=> "}'} [0x22 resolution 21]
 
 landuse=basin [0x3f resolution 20]
 landuse=reservoir | (natural=water & water=reservoir) [0x3f resolution 20]
@@ -78,7 +78,9 @@
 natural=bay [0x3d resolution 18]
 natural=glacier [0x4d resolution 18]
 natural=marsh [0x51 resolution 20]
+natural=tundra [0x52 resolution 18]
 natural=mud [0x51 resolution 20]
+natural=beach | natural=sand [0x53 resolution 20]
 natural=wetland [0x51 resolution 20]
 natural=water & water=canal [0x48 resolution 22]
 natural=water & water=lock [0x4c resolution 22 default_name 'Lock']
@@ -94,13 +96,14 @@
 
 landuse=allotments [0x4e resolution 21]
 landuse=cemetery | landuse=cemetary | amenity=grave_yard [0x1a resolution 21]
-landuse=commercial [0x0c resolution 19]
+landuse=commercial [0x0f resolution 19]
 landuse=construction [0x0c resolution 21]
-landuse=farm | landuse=farmland [0x4e resolution 20]
-landuse=farmyard [0x10 resolution 22]
+landuse=farm [0x26 resolution 22]
+landuse=farmland [0x1c resolution 20]
+landuse=farmyard [0x26 resolution 22]
 landuse=forest | landuse=wood [0x50 resolution 20]
-landuse=greenfield [0x17 resolution 20]
-landuse=meadow | landuse=grass [0x17 resolution 19]
+landuse=greenfield [0x1c resolution 20]
+landuse=meadow | landuse=grass [0x1c resolution 19]
 landuse=military [0x04 resolution 19]
 landuse=quarry [0x0c resolution 19]
 landuse=recreation_ground [0x19 resolution 19]
@@ -107,14 +110,14 @@
 # dedicate resolution 24 for building=* instead of related landuse=*
 landuse=industrial [0x0c resolution 19-23]
 landuse=residential [0x10 resolution 19-23]
-landuse=retail [0x08 resolution 20-23]
-landuse=village_green [0x17 resolution 20]
+landuse=retail [0x12 resolution 20-23]
+landuse=village_green [0x15 resolution 20]
 landuse=vineyard [0x4e resolution 20]
 landuse=orchard [0x4e resolution 20]
 
 military=airfield [0x04 resolution 20]
 military=barracks [0x04 resolution 23]
-military=danger_area [0x04 resolution 20]
+military=danger_area [0x11 resolution 20]
 military=range [0x04 resolution 20]
 
 natural=scrub [0x4f resolution 20]
@@ -121,12 +124,12 @@
 natural=wood [0x50 resolution 20]
 
 # building tag should be last
-amenity=* & area!=no & amenity!=grave_yard {add name='${amenity|subst:"_=> "}'} [0x13 resolution 24]
+amenity=* & area!=no & amenity!=grave_yard {add name='${amenity|subst:"_=> "}'} [0x23 resolution 24]
 building=* & building!=no [0x13 resolution 24]
-tourism=* & area!=no & waterway!=* {add name='${tourism|subst:"_=> "}'} [0x1f resolution 24]
+tourism=* & area!=no & waterway!=* {add name='${tourism|subst:"_=> "}'} [0x21 resolution 24]
 
 # man_made can be used on areas or lines
-man_made=* & area!=no {add name='${man_made|subst:"_=> "}'} [0x13 resolution 24]
+man_made=* & area!=no {add name='${man_made|subst:"_=> "}'} [0x24 resolution 24]
 
 # render small named islands
 place=island & name=* & area_size() < 1000000 [0x53 resolution 19]
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