diff --git a/rdf-processing-toolkit-cli/src/main/java/org/aksw/bench/geo/cmd/CmdBenchGenGridDataGen.java b/rdf-processing-toolkit-cli/src/main/java/org/aksw/bench/geo/cmd/CmdBenchGenGridDataGen.java
index b64d70f..fd226c5 100644
--- a/rdf-processing-toolkit-cli/src/main/java/org/aksw/bench/geo/cmd/CmdBenchGenGridDataGen.java
+++ b/rdf-processing-toolkit-cli/src/main/java/org/aksw/bench/geo/cmd/CmdBenchGenGridDataGen.java
@@ -142,7 +142,9 @@ public Integer call() throws Exception {
 
         Stream<Quad> quads =
             IntStream.range(0, graphs).boxed().flatMap(g -> {
-                double ratio = scale ? 1 - g / (double)graphs : 1.0;
+                double ratioBase = scale ? 1 - g / (double)graphs : 1.0;
+                // Always make cells a bit smaller to avoid corner cases with touching envelopes
+                double ratio = 0.95 * ratioBase;
                 Node graph = NodeFactory.createURI(genGraphName(g));
                 return grid.stream().flatMap(cell -> {
                     Node feature = NodeFactory.createURI("https://www.example.org/feature/" + g + "/" + cell.row() + "/" + cell.col());