adding basic glacier styling and rock/scree rendering in antarctica

landcover.mss

@@ -52,6 +52,8 @@
 @power: #bbb;
 @rest_area: #efc8c8; // also services
 @sand: #ffdf88;
+@scree: #CCBBAA;
+@rock: #B2A7A3;
 @school: #f0f0d8; // also university, college, hospital, kindergarten
 
 #landcover {
@@ -401,6 +403,15 @@
   }
 }
 
+#bare-rock {
+  [zoom >= 6] {
+      polygon-fill: @rock;
+      ['natural' = 'scree'] {
+        polygon-fill: @scree;
+      }
+  }
+}
+
 /* man_made=cutline */
 #landcover-line {
   [zoom >= 14] {

openstreetmap-carto.style

@@ -142,6 +142,8 @@ node,way   waterway     text         polygon
 node,way   wetland      text         polygon
 node,way   width        text         linear
 node,way   wood         text         linear
+node,way   glacier:type text         polygon
+node,way   geological   text         polygon
 node,way   z_order      int4         linear # This is calculated during import
 way        way_area     real                # This is calculated during import
 

project.mml

@@ -251,7 +251,7 @@
       ],
       "Datasource": {
         "type": "postgis",
-        "table": "      (select way,\"natural\",waterway,landuse,name\n      from planet_osm_polygon\n      where (waterway in ('dock','mill_pond','riverbank','canal')\n         or landuse in ('reservoir','water','basin')\n         or \"natural\" in ('lake','water','land','glacier','mud'))\n         and building is null\n      order by z_order,way_area desc\n      ) as water_areas",
+        "table": "      (select way,\"natural\",waterway,landuse,geological,\"glacier:type\",name\n      from planet_osm_polygon\n      where (waterway in ('dock','mill_pond','riverbank','canal')\n         or landuse in ('reservoir','water','basin')\n         or \"natural\" in ('lake','water','land','glacier','mud'))\n         and building is null\n      order by z_order,way_area desc\n      ) as water_areas",
         "extent": "-20037508,-19929239,20037508,19929239",
         "key_field": "",
         "geometry_field": "way",
@@ -264,6 +264,29 @@
       "advanced": {},
       "name": "water-areas"
     },
+    {
+      "geometry": "polygon",
+      "extent": [
+        -179.99999692067183,
+        -85.051,
+        179.99999692067183,
+        -60
+      ],
+      "Datasource": {
+        "type": "postgis",
+        "table": "      (select way,\"natural\"\n      from planet_osm_polygon\n      where \"natural\" in ('bare_rock','scree')\n      order by z_order,way_area desc\n      ) as bare_rock",
+        "extent": "-20037508,-20037508,20037508,8400000",
+        "key_field": "",
+        "geometry_field": "way",
+        "dbname": "gis"
+      },
+      "id": "bare-rock",
+      "class": "",
+      "srs-name": "900913",
+      "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+      "advanced": {},
+      "name": "bare-rock"
+    },
     {
       "geometry": "polygon",
       "extent": [

shapefiles.mss

@@ -29,7 +29,7 @@
     polygon-fill: @land-color;
   }
   [zoom >= 1][zoom < 10] {
-    polygon-pattern-file: url('symbols/glacier.png');
+    polygon-fill: #ddecec;
   }
 }
 
@@ -41,6 +41,7 @@
 
 #coast-poly-south {
   [zoom >= 10] {
+    polygon-fill: #ddecec;
     polygon-pattern-file: url('symbols/glacier2.png');
   }
 }

water.mss

@@ -2,13 +2,21 @@
 
 #water-areas {
   [natural = 'glacier']::natural {
-    [zoom >= 6] {
-      line-dasharray: 4,2;
-      line-width: 1.5;
-      line-color: #9cf;
-      polygon-pattern-file: url('symbols/glacier.png');
-      [zoom >= 8] {
-        polygon-pattern-file: url('symbols/glacier2.png');
+    ['glacier:type' = 'shelf'][zoom >= 2], 
+    ['glacier:type' = 'ice_tongue'][zoom >= 4] {
+      polygon-fill: #d4e6e6;
+    }
+    ['glacier:type' != 'shelf']['glacier:type' != 'ice_tongue'] {
+      ['glacier:type' = 'icecap'][zoom >= 4], 
+      [zoom >= 6] {
+        line-dasharray: 4,2;
+        line-width: 1.5;
+        line-color: #9cf;
+        polygon-fill: #ddecec;
+        [geological = 'moraine'] { polygon-fill: #D8DEDE; }
+        [zoom >= 8] {
+          polygon-pattern-file: url('symbols/glacier2.png');
+        }
       }
     }
   }