leaf type rendering with slightly bigger symbols and switch forest patterns to 256 px

landcover.mss

@@ -652,7 +652,11 @@
 
   //Also landuse = forest, converted in the SQL
   [natural = 'wood'][zoom >= 13]::wood {
-    polygon-pattern-file: url('symbols/forest.svg'); // Lch(55,30,135)
+    polygon-pattern-file: url('symbols/leaftype_unknown.svg'); // Lch(55,30,135)
+    [leaf_type = "broadleaved"] { polygon-pattern-file: url('symbols/leaftype_broadleaved.svg'); }
+    [leaf_type = "needleleaved"] { polygon-pattern-file: url('symbols/leaftype_needleleaved.svg'); }
+    [leaf_type = "mixed"] { polygon-pattern-file: url('symbols/leaftype_mixed.svg'); }
+    [leaf_type = "leafless"] { polygon-pattern-file: url('symbols/leaftype_leafless.svg'); }
     polygon-pattern-alignment: global;
     opacity: 0.4; // The entire layer has opacity to handle overlapping forests
   }

project.mml

@@ -258,7 +258,8 @@ Layer:
                     ELSE NULL
                     END 
                 END
-              END AS int_wetland
+              END AS int_wetland,
+            tags->'leaf_type' AS leaf_type
           FROM planet_osm_polygon
           WHERE ("natural" IN ('marsh', 'mud', 'wetland', 'wood', 'beach', 'shoal', 'reef', 'scrub') OR landuse = 'forest')
             AND building IS NULL

symbols/generating_patterns/forest.md

@@ -1,9 +1,10 @@
-Pattern file for forests is generated in two steps.
+Pattern file for forests is generated in various steps.
 
-In the first step visit [jsdotpattern (command sequence is recorded)](http://www.imagico.de/map/jsdotpattern.php#x,512,jdp6894;g,30,32,32;s,jdp33742;s,jdp81637;rx,250,2,32,32;s,jdp28824;s,jdp59702;s,jdp91550;s,jdp27774;rx,250,2,64,64;rd,1,0,0,tree%20pair,1,5,5,0,jdp52898,6b8d5e,add19e;)
+For the pattern for unknown leave type visit [jsdotpattern (command sequence is recorded)](http://www.imagico.de/map/jsdotpattern.php#x,256,jdp6894;g,30,32,32;s,jdp33742;s,jdp81637;rx,250,2,32,32;s,jdp28824;s,jdp59702;s,jdp91550;s,jdp27774;rx,250,2,64,64;rd,1,0,0,tree%20pair,1,5,5,0,jdp52898,6b8d5e,add19e;) For the other leave types you have to install jsdotpattern locally, and install the SVG symbols (broadleaved.svg and needleleaved.svg, see the documentation of jsdotpattern about how to do this) and use the same command sequence. For the mixed leave type, you have to use broadleaved.svg and needleleaved.svg together in a subfolder. For the mixed leave type, you have to use leafless1.svg and leafless2.svg together in a subfolder.
 
 Generate file - use "render (px aligned)" followed by using "get pattern SVG data" (it is expected that background will be transparent, background colour in jsdotpattern is only for display).
 
 Generated SVG image is sanitized for use with Mapnik by the script svg_pattern.sh from the jsdotpattern repository at http://github.com/imagico/jsdotpattern.
 
-The final file is forest.svg
+The final files are leavetype_unknown, leavetype_mixed.svg, leavetype_broadleaved.svg, leavetype_needleleaved.svg and leavetype_leafless.svg.
+