From 2f62465fff57e0c5d2c03d8b95d6ee4c3d2a6c46 Mon Sep 17 00:00:00 2001
From: Dane Springmeyer <dane@dbsgeo.com>
Date: Tue, 24 Sep 2013 10:23:52 -0700
Subject: [PATCH] tweak the sketch of how painters algo works

---
 Postgis-async.md | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/Postgis-async.md b/Postgis-async.md
index 8fb3a2e..fd1b2b5 100644
--- a/Postgis-async.md
+++ b/Postgis-async.md
@@ -7,10 +7,11 @@ Mapnik uses the painter's algorithm to render maps. It means that layers are dra
 
 ```
     For each layer
-       Query the features from the layer
-       Wait for the features...
-       For each feature in this layer
-           Draw the feature
+       For each style attached to the layer
+         Query the features from the layer
+         Wait for the features...
+         For each feature in this layer for given style
+             For each matching rule draw the feature
 ```
 In this case, the renderer spends a lot of time waiting for PostGIS to perform the query that will feed with features.