contours

contours/Makefile

@@ -0,0 +1,46 @@
+BOUNDS = xmin=582700 ymin=6060750 xmax=584830 ymax=6062750
+XYZ = $(patsubst %.zip,%.xyz,$(wildcard DTM_*.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.tif: all.xyz
+	gdal_translate $< $@ \
+		-ot Float32 -a_srs EPSG:3346 \
+		-co COMPRESS=DEFLATE -co PREDICTOR=2
+
+.INTERMEDIATE: all.xyz
+all.xyz: $(XYZ)
+	echo $(XYZ)
+	$(SORT) -m $^ > $@
+
+.INTERMEDIATE: $(XYZ)
+%.xyz: %.zip
+	unzip -qq -c $< $@ | \
+		./clip.awk $(addprefix -v ,$(BOUNDS)) | \
+		$(SORT) > $@
+
+db/.ready: managedb
+	-./managedb stop; rm -fr db
+	./managedb init
+	touch $@