diff --git a/src/main/java/eu/simstadt/regionchooser/fast_xml_parser/ConvexHullCalculator.java b/src/main/java/eu/simstadt/regionchooser/fast_xml_parser/ConvexHullCalculator.java
index 299110d86e487fb0b9607ae7694098de5b3d1ab6..4e9e6b99cc3c46978cf12c61f9500854449d42c7 100644
--- a/src/main/java/eu/simstadt/regionchooser/fast_xml_parser/ConvexHullCalculator.java
+++ b/src/main/java/eu/simstadt/regionchooser/fast_xml_parser/ConvexHullCalculator.java
@@ -92,6 +92,7 @@ public static void extractHullsForEveryCityGML(Path repository, Consumer<String>
 					try {
 						Path kmlPath = getHullPath(repository, gmlPath);
 						if (Files.exists(kmlPath)) {
+							//TODO: Check if size is the same as original. Recreate otherwise.
 							LOGGER.fine("Using cache from " + repository.relativize(kmlPath));
 							return new String(Files.readAllBytes(kmlPath), StandardCharsets.UTF_8);
 						} else {