Unstructured data can be located everywhere. In fact, most individuals and organizations operate and store unstructured data throughout their entire life. Unstructured can be either machine-generated or human-generated. Most of the machine-generated unstructured data is satellite images, scientific data, photographs, or radar data:
Figure 3.5: Different sources of unstructured datasets
As shown in the preceding diagram, unstructured data can also be classified as machine-generated or human-generated. Most of the machine-generated datasets are satellite images, scientific data, photographs and videos, or radar or sonar data. Most of the human-generated unstructured datasets are documents, social media data, mobile data, and website contents.