Add filters to opennames processing. Filter out suburban areas.

cmd/localtypes/main.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"sort"
+
+	"github.com/ray1729/gpx-utils/pkg/openname"
+)
+
+func main() {
+	log.SetFlags(0)
+	if len(os.Args) != 2 {
+		log.Fatal("Usage: %s OPNAME_CSV_ZIP", os.Args[0])
+	}
+	var records []*openname.Record
+	openname.ProcessFile(
+		os.Args[1],
+		func(r *openname.Record) error {
+			records = append(records, r)
+			return nil
+		},
+		openname.FilterType("populatedPlace"),
+		openname.FilterWithinRadius(544945, 258410, 20000),
+	)
+	sort.Slice(records, func(i, j int) bool {
+		return records[i].Name < records[j].Name
+	})
+	for _, r := range records {
+		fmt.Printf("%s,%s\n", r.Name, r.LocalType)
+	}
+}