diff --git a/CHANGELOG.md b/CHANGELOG.md
index b9d0fae4b65c6fdcc30cfa2fb84898185a3c10f3..9e22484de375a1b022e5842425ebb7b3250aec7a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 Upcoming version:
 -----------------
+  - fixed problems with deleting of tables in between srid change (Nikolaus Krismer)
   - fixed a problem when generating db dumps for multiple srids (Nikolaus Krismer)
   - allowing multiple target_srids now (Nikolaus Krismer)
   - added information about srid 82344 (Nikolaus Krismer)
diff --git a/bootstrap/importData.sh b/bootstrap/importData.sh
index ab27e60d69b55dc5864ea5b9347d14d9e65ed737..7ef3a32925d5b064611bcdcaf3d32ff9e5dda61a 100755
--- a/bootstrap/importData.sh
+++ b/bootstrap/importData.sh
@@ -105,14 +105,14 @@ function fn_import_dataset_postgis() {
 		cp $DOWNLOAD_DIR/$SQL_EXPORT_FILE $DATA_DIR/$SQL_EXPORT_FILE >> /dev/null 2>&1
 
 		echo "  - importing SQL export into PostGIS database"
-		gunzip -c $DATA_DIR/$SQL_EXPORT_FILE | PGPASSWORD="$PG_DB_PASSWORD" psql -U "$PG_DB_USER" -h localhost "$PG_DB_NAME" >> "$WORKING_DIR/import_datamodel_$CITY.log" 2>&1
+		gunzip -c $DATA_DIR/$SQL_EXPORT_FILE | PGPASSWORD="$PG_DB_PASSWORD" psql -U "$PG_DB_USER" -h localhost "$PG_DB_NAME" >> "$WORKING_DIR/import_datamodel_$CITY_$SRID.log" 2>&1
 
 		echo "  - getting table permissions"
 		tables=`PGPASSWORD="$PG_DB_PASSWORD" psql -qAt -U "$PG_DB_USER" -h localhost -c "SELECT tablename FROM pg_tables WHERE schemaname = 'public' AND tableowner = 'postgres';" "$PG_DB_NAME"`
 
 		echo "  - fixing table permissions"
-		for tbl in $tables ; do
-			PGPASSWORD="$PG_DB_PASSWORD" psql -qAt -U "$PG_DB_USER" -h localhost -c "ALTER TABLE $tbl OWNER TO $PG_DB_USER" "$PG_DB_NAME";
+		for tbl in $tables; do
+			PGPASSWORD="$PG_DB_PASSWORD" psql -qAt -U "$PG_DB_USER" -h localhost -c "ALTER TABLE $tbl OWNER TO $PG_DB_USER" "$PG_DB_NAME"
 		done
 	fi
 
@@ -124,20 +124,22 @@ function fn_import_dataset_postgis() {
 	if $AVAILABLE_ISOCHRONE_DATAMODEL && [ ! -f "$DATA_DIR/$SQL_EXPORT_FILE" ]; then
 		echo "  - creating datamodel using isochrone-datamodel"
 		# Create datamodel using isochrone-datamodel project
-		DB_USERNAME="$PG_DB_USER" DB_PASSWORD="$PG_DB_PASSWORD" "$DEPLOY_DIR/isochrone-datamodel/builder.sh" -d -s -b -l -t${SRID} -c${CITY} >> "$WORKING_DIR/create_datamodel_$CITY.log" 2>&1
+		DB_USERNAME="$PG_DB_USER" DB_PASSWORD="$PG_DB_PASSWORD" "$DEPLOY_DIR/isochrone-datamodel/builder.sh" -d -s -b -l -t${SRID} -c${CITY} >> "$WORKING_DIR/create_datamodel_$CITY_$SRID.log" 2>&1
 
 		echo "  - copying tables to isochrone database"
-		PGPASSWORD="spatial" pg_dump -U spatial -h localhost -p 5432 -d spatial --clean --if-exists --no-privileges --no-owner -t "transformed.${CITY}_*"  | sed -e "s/transformed/public/g" | PGPASSWORD="$PG_DB_PASSWORD" psql -h localhost  -U "$PG_DB_USER" -p 5432 -d isochrone >> "$WORKING_DIR/create_datamodel_$CITY.log" 2>&1
+		# If working with multiple TARGET_SRIDs we have to delete an eventually existing nodes_density table here, so on import later a DROP TABLE ${CITY}_nodes works wihtout CASCADE (pg_dump does not use CASCADE)
+		PGPASSWORD="$PG_DB_PASSWORD" psql -qAt -U "$PG_DB_USER" -h localhost -d isochrone -c "DROP TABLE IF EXISTS ${CITY}_nodes_density" >> "$WORKING_DIR/create_datamodel_$CITY_$SRID.log" 2>&1
+		PGPASSWORD="spatial" pg_dump -U spatial -h localhost -d spatial --clean --if-exists --no-privileges --no-owner -t "transformed.${CITY}_*"  | sed -e "s/transformed/public/g" | PGPASSWORD="$PG_DB_PASSWORD" psql -U "$PG_DB_USER" -h localhost -d isochrone >> "$WORKING_DIR/create_datamodel_$CITY_$SRID.log" 2>&1
 	fi
 
 	if $AVAILABLE_POSTGIS && $AVAILABLE_ISOCHRONE_TOOLS; then
-		java -cp $DOWNLOAD_DIR/isochrone-tools.jar at.uibk.dbis.isochrone.generator.density.DensityGenerator -t "$CITY" -d 60,120,180,240,300 >> "$WORKING_DIR/create_datamodel_$CITY.log" 2>&1
+		java -cp $DOWNLOAD_DIR/isochrone-tools.jar at.uibk.dbis.isochrone.generator.density.DensityGenerator -t "$CITY" -d 60,120,180,240,300 >> "$WORKING_DIR/create_datamodel_$CITY_$SRID.log" 2>&1
 	fi
 
 	if $AVAILABLE_ISOCHRONE_DATAMODEL; then
 		# Exporting resulting database to $DATA_DIR
-		echo "  - exporting database dump for ${CITY}"
-		PGPASSWORD="$PG_DB_PASSWORD" pg_dump -U "$PG_DB_USER" -h localhost -p 5432 -d isochrone --clean --compress=5 --if-exists -t "${CITY}_*" --file="$DATA_DIR/$SQL_EXPORT_FILE" >> "$WORKING_DIR/create_datamodel_$CITY.log" 2>&1
+		echo "  - exporting database dump"
+		PGPASSWORD="$PG_DB_PASSWORD" pg_dump -U "$PG_DB_USER" -h localhost -d isochrone --clean --compress=5 --if-exists -t "${CITY}_*" --file="$DATA_DIR/$SQL_EXPORT_FILE" >> "$WORKING_DIR/create_datamodel_$CITY_$SRID.log" 2>&1
 	fi
 }
 
@@ -198,7 +200,7 @@ function fn_import_spatialite() {
 	
 	if $AVAILABLE_GDAL && [ ! -f "$DATA_DIR/$SPATIALITE_FILENAME" ]; then
 		echo "Exporting PostGIS data into spatialite database" 
-		$DEPLOY_DIR/gdal/apps/ogr2ogr --config PG_LIST_ALL_TABLES YES --config PG_SKIP_VIEWS YES -progress -f "SQLite" "$DATA_DIR/$SPATIALITE_FILENAME" PG:"host=localhost dbname=isochrone user=$PG_DB_USER password=$PG_DB_PASSWORD" -lco LAUNDER=yes -dsco SPATIALITE=yes -lco SPATIAL_INDEX=yes -gt 65536  >> "$WORKING_DIR/setup_spatialite.log" 2>&1
+		$DEPLOY_DIR/gdal/apps/ogr2ogr --config PG_LIST_ALL_TABLES YES --config PG_SKIP_VIEWS YES -progress -f "SQLite" "$DATA_DIR/$SPATIALITE_FILENAME" PG:"host=localhost dbname=isochrone user=$PG_DB_USER password=$PG_DB_PASSWORD" -lco LAUNDER=yes -dsco SPATIALITE=yes -lco SPATIAL_INDEX=yes -gt 65536  >> "$WORKING_DIR/import_spatialite.log" 2>&1
 	fi
 
 	if [ -f "$DATA_DIR/$SPATIALITE_FILENAME" ]; then