diff --git a/scripts/postal_code_tools/genWallonia.sh b/scripts/postal_code_tools/genWallonia.sh
new file mode 100644
index 000000000..ba6e85cb3
--- /dev/null
+++ b/scripts/postal_code_tools/genWallonia.sh
@@ -0,0 +1,14 @@
+#! /bin/bash
+
+# Generates data for the wallonia address dataset: convex hulls for postal code outlines, tiled address files for import
+
+wget https://opendata.bosa.be/download/best/openaddress-bewal.zip
+unzip openaddress-bewal.zip 
+rm openaddress-bewal.zip 
+mkdir data
+mkdir tiles
+mv openaddress-bewal.csv data/
+ts-node openaddressestogeojson.ts data/openaddress-bewal.csv data/openaddress --per-postal-code
+ts-node openaddressestogeojson.ts data/openaddress-bewal.csv data/openaddress.geojson.nljson
+ts-node ../slice.ts data/openaddress.geojson.nljson 14 tiles/
+
diff --git a/scripts/postal_code_tools/openaddresses2geojson.ts b/scripts/postal_code_tools/openaddressestogeojson.ts
similarity index 92%
rename from scripts/postal_code_tools/openaddresses2geojson.ts
rename to scripts/postal_code_tools/openaddressestogeojson.ts
index 572603fc9..ee87757c6 100644
--- a/scripts/postal_code_tools/openaddresses2geojson.ts
+++ b/scripts/postal_code_tools/openaddressestogeojson.ts
@@ -1,11 +1,7 @@
 import * as fs from "fs";
-import * as readline from "readline";
-import ScriptUtils from "./ScriptUtils";
 import {existsSync, writeFileSync} from "fs";
-import {GeoOperations} from "../Logic/GeoOperations";
-import {Utils} from "../Utils";
-import {post} from "jquery";
-import {createECDH} from "crypto";
+import * as readline from "readline";
+import ScriptUtils from "../ScriptUtils";
 
 /**
  * Converts an open-address CSV file into a big geojson file
@@ -35,7 +31,9 @@ async function main(args: string[]) {
     let failed = 0
     
     let createdFiles : string [] = []
-    fs.writeFileSync(outputFile, "")
+    if(!perPostalCode){
+        fs.writeFileSync(outputFile, "")
+    }
     // @ts-ignore
     for await (const line of rl) {
         i++;
@@ -65,6 +63,12 @@ async function main(args: string[]) {
 
         let targetFile = outputFile
         if (perPostalCode) {
+            if(parsed["postcode"] === ""){
+                continue
+            }
+            if(isNaN(Number(parsed["postcode"]))){
+                continue;
+            }
             targetFile = outputFile + "-" + parsed["postcode"] + ".geojson"
             let isFirst = false
             if(!existsSync(targetFile)){
diff --git a/scripts/postal_code_tools/prepPostalCodesHulls.ts b/scripts/postal_code_tools/prepPostalCodesHulls.ts
index 33a0816a7..c1c81006a 100644
--- a/scripts/postal_code_tools/prepPostalCodesHulls.ts
+++ b/scripts/postal_code_tools/prepPostalCodesHulls.ts
@@ -1,6 +1,5 @@
 import * as fs from "fs";
-import ScriptUtils from "./ScriptUtils";
-import {post} from "jquery";
+import ScriptUtils from "../ScriptUtils";
 import {writeFileSync} from "fs";
 
 function handleFile(file: string, postalCode: number) {