Updated mapnik.Layer (markdown)

mapnik.Layer.md

@@ -1,42 +1,76 @@
-<type 'Boost.Python.class'>
-
-###abstract
-
-
-###active
-
-
-###cache_features
-
-
-###clear_label_cache
-
-
 ###datasource
 
-
 ###envelope
 
+envelope( (Layer)arg1) -> Box2d :
+    Return the geographic envelope/bounding box.
+    Determined based on the layer datasource.
+
+Usage:
+
+    >>> from mapnik import Layer
+    >>> lyr = Layer('My Layer','+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs')
+    >>> lyr.envelope()
+    box2d(-1.0,-1.0,0.0,0.0) # default until a datasource is loaded
+    
+
+C++ signature :
+
+    mapnik::box2d<double> envelope(mapnik::layer {lvalue})
 
 ###maxzoom
 
+Float
 
 ###minzoom
 
+Float
 
 ###name
 
+String
+
 
 ###queryable
 
+Boolean
+
 
 ###srs
 
+String representing the spatial reference system of the map.
 
 ###styles
 
+a list of mapnik.Style objects
 
 ###title
 
+String
 
 ###visible
+
+
+visible( (Layer)arg1, (float)arg2) -> bool :
+    Return True if this layer's data is active and visible at a given scale.
+    
+    Otherwise returns False.
+    Accepts a scale value as an integer or float input.
+    Will return False if:
+    	scale >= minzoom - 1e-6
+    	or:
+    	scale < maxzoom + 1e-6
+    
+Usage:
+
+    >>> from mapnik import Layer
+    >>> lyr = Layer('My Layer','+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs')
+    >>> lyr.visible(1.0/1000000)
+    True
+    >>> lyr.active = False
+    >>> lyr.visible(1.0/1000000)
+    False
+    
+
+    C++ signature :
+        bool visible(mapnik::layer {lvalue},double)