diff --git a/contours/Makefile.2008 b/contours/Makefile.2008
new file mode 100644
index 0000000..8828eae
--- /dev/null
+++ b/contours/Makefile.2008
@@ -0,0 +1,51 @@
+#uzupis
+#BOUNDS = xmin=582700 ymin=6060750 xmax=584830 ymax=6062750
+#krekenava
+BOUNDS = xmin=493674 ymin=6146103 xmax=518869 ymax=6171741
+XYZ = $(patsubst %.zip,%.xyz,$(wildcard 6*.zip))
+SORT = sort -n -k2 -k1 -t,
+
+.PHONY: all
+all: smooth_2_5.gpkg smooth_5.gpkg
+
+smooth_%.gpkg: db/smooth_%
+	ogr2ogr $@ "PG:host=127.0.0.1 user=osm dbname=osm" $(basename $@)
+
+db/smooth_%: db/contour_% chaikin.sql
+	./managedb -- --echo-all \
+		-v ON_ERROR_STOP=1 \
+		-v src=$(notdir $(basename $<)) \
+		-v tbl=$(notdir $(basename $@)) \
+		-f chaikin.sql
+	touch $@
+
+db/contour_%: contour_%.gpkg db/.ready
+	./managedb -- -c "DROP TABLE IF EXISTS $(basename $<)"
+	ogr2ogr -f PostgreSQL "PG:host=127.0.0.1 user=osm dbname=osm" $<
+	touch $@
+
+contour_%.gpkg: all.tif
+	gdal_contour -nln $(basename $@) -i $(subst _,.,$*) -a z $^ $@
+
+all-grid.tif: all.vrt all.csv
+	gdal_grid $< $@ -ot Float32
+
+all.tif: all-grid.tif
+	gdal_translate $< $@ \
+		-ot Float32 -a_srs EPSG:3346 \
+		-co COMPRESS=DEFLATE -co PREDICTOR=2
+
+.INTERMEDIATE: all.csv
+all.csv: $(XYZ)
+	$(SORT) -m $^ > $@
+
+.INTERMEDIATE: $(XYZ)
+%.xyz: %.zip
+	unzip -qq -c $< $@ | \
+		./clip-2009.awk $(addprefix -v ,$(BOUNDS)) | \
+		$(SORT) > $@
+
+db/.ready: managedb
+	mkdir -p db
+	./managedb start
+	touch $@
diff --git a/contours/Makefile b/contours/Makefile.2017
similarity index 100%
rename from contours/Makefile
rename to contours/Makefile.2017
diff --git a/contours/all.vrt b/contours/all.vrt
new file mode 100644
index 0000000..b6346ff
--- /dev/null
+++ b/contours/all.vrt
@@ -0,0 +1,8 @@
+<OGRVRTDataSource>
+  <OGRVRTLayer name="all">
+    <LayerSRS>EPSG:3346</LayerSRS>
+    <SrcDataSource>all-small.csv</SrcDataSource>
+    <GeometryType>wkbPoint</GeometryType>
+    <GeometryField encoding="PointFromColumns" x="field_1" y="field_2" z="field_3"/>
+  </OGRVRTLayer>
+</OGRVRTDataSource>