id	keyword
esrj-118386	loess geomorphologic
esrj-118386	types
esrj-118386	loess ridge
esrj-118386	loess knoll
esrj-118386	valley
esrj-118386	digital
esrj-118386	index
esrj-118386	loess plateau
esrj-118386	valley loess
esrj-118386	distribution
esrj-118386	research
esrj-118386	data
esrj-118386	sensing
esrj-118386	loess tableland
esrj-118386	images