From d43d5e37ef45f21c4ba98592c8441b032d13c439 Mon Sep 17 00:00:00 2001
From: Matthew Bartos <matthew.d.bartos@gmail.com>
Date: Sat, 11 Apr 2015 15:20:21 -0700
Subject: [PATCH] Better construction of r_idx

---
 geopandas/tools/sjoin.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/geopandas/tools/sjoin.py b/geopandas/tools/sjoin.py
index e1a43ad..029ee64 100644
--- a/geopandas/tools/sjoin.py
+++ b/geopandas/tools/sjoin.py
@@ -52,7 +52,7 @@ def sjoin(left_df, right_df, how='inner', op='intersects', lsuffix='left', rsuff
     idxmatch = idxmatch[idxmatch.str.len() > 0]
 
     r_idx = np.concatenate(idxmatch.values)
-    l_idx = np.concatenate((idxmatch.str.len()*pd.Series([[i] for i in idxmatch.index], index=idxmatch.index)).values)
+    l_idx = idxmatch.index.values.repeat(idxmatch.str.len().values) 
 
     # VECTORIZE PREDICATE OPERATIONS
     def find_intersects(a1, a2):