Added waiting for first generation of layer in DB.

inputs/load_vector_data.sh

@@ -36,6 +36,7 @@ for file in "$dir"/*; do
     if [ $counter -eq 0 ]; then
         # Process the first file
         ogr2ogr -f MySQL MySQL:"$DB_NAME,host=$DB_HOST,user=$DB_USER,password=$DB_PASS" "$file" -nln footprints -update -overwrite -lco engine=Aria &
+    	wait
     else
         # Process other files in parallel
         ogr2ogr -f MySQL MySQL:"$DB_NAME,host=$DB_HOST,user=$DB_USER,password=$DB_PASS" "$file" -nln footprints -update -append &