Knowledge Base Question

What is the difference between assembled and customized data?

IRIS Webmaster gravatar

IRIS Webmaster  staff  Oct. 7, 2013, 1:48 p.m.

What is the difference between assembled and customized data?

Adam Clark gravatar

Adam Clark  staff  Oct. 7, 2013, 2:30 p.m.

Assembled Data

Some data comes to the DMC in a format other than SEED, such as SEG-Y or SAC. These data are considered “assembled” because they are unique to a project or experiment and are not archived in the same way that the SEED data is archived. Users request this data via e-mail to and may request all or part of the data set.

The MetaData Aggregator (MDA) tool can look at assembled data or use SeismiQuery to View Assembled Datasets Inventory.

Customized Data

Customized data is data from the IRIS DMC that is specifically created to a user’s specifications, which can be by network, station, channel, and time as limiting parameters. Each user has special needs, and customized requests allow users to get the data they want for their particular area of study. BREQ_FAST is the single best example of a customized request tool, and one that is still most commonly used today.

You can check for data availability when using MDA or by directly going to the data_available tool.