Aggregated data received from an analytical laboratory for field samples or measurements made directly during fieldwork are both examples of datasets. If a number of datasets are combined together into a searchable product or defined system, this product or system is an example of a database regardless of whether a formal database management system is used. A geologic map has a geospatial dataset, and when this dataset is combined with other regional datasets, the result is another example of a database. The National Water Information System (NWIS) is a database. Data retrieved from NWIS (such as a table of data) are a dataset.