Complex sentence: Earth sciences, such as hydrology and geology, continue to use customary units for field surveying, due both to the legacy of many decades of data collection and to the need to work with the construction industry, which has not adopted the metric system.
Split into simpler sentences: Earth sciences, such as hydrology and geology, continue to use customary units for field surveying. This due both to the legacy of many decades of data collection and to the need to work with the construction industry, which has not adopted the metric system.