Skip to main content
Advanced Search

Filters: Tags: legacy data (X)

6 results (48ms)   

View Results as: JSON ATOM CSV
thumbnail
The original time series and cross power data were stored in Binary format on 3.5" disks until further conversion was needed. To convert the time series and cross power data to a format that can be used for modeling, the original binary files were converted to ASCII format using Basic 4.0 code and associated subroutines (see Magnetotelluric_Original-Code_Binary-to-Ascii.txt and Magnetotelluric_Original-Code_Binary-to-Ascii-Subroutines.txt attached to the binary data ScienceBase item). The DaR project used these converted ASCII format files to create the EDI format files included in this data release. The binary data are considered the original data for the magnetotelluric survey, therefore, they are provided with...
thumbnail
The U.S. Geological Survey (USGS) Geology, Geophysics and Geochemistry Science Center (GGGSC) collaborated with the USGS Data at Risk (DaR) team to preserve and release a subset of magnetotelluric data from the San Andreas Fault in Parkfield, California. The San Andreas Fault data were collected by the Branch of Geophysics, a precursor to the now GGGSC, between 1989 and 1994. The magnetotelluric data selected for this preservation project were collected in 1990 using USGS portable truck mounted systems that measure the distribution of electrical conductivity beneath the surface of the earth. Truck mounted systems of this era output data to 3.5” discs, from which data were recovered and transformed to binary or ASCII...
thumbnail
The EDI time series and cross power data were converted from ASCII format using Python-based software developed for this preservation project. The data in EDI format can use magnetotelluric interpretation software to produce models of the resistivity of the measured environment. The metadata in the Info section of the EDI files can be used to convert data to SPUD format, another format used for modelling (Wight, 1988).
thumbnail
Legacy data (n) - Information stored in an old or obsolete format or computer system that is, therefore, difficult to access or process. (Business Dictionary, 2016) For over 135 years, the U.S. Geological Survey has collected diverse information about the natural world and how it interacts with society. Much of this legacy information is one-of-a-kind and in danger of being lost forever through decay of materials, obsolete technology, or staff changes. Several laws and orders require federal agencies to preserve and provide the public access to federally collected scientific information. The information is to be archived in a manner that allows others to examine the materials for new information or interpretations....
thumbnail
The ASCII data included in this data release are the intermediary files between the original binary and final EDI formatted files. These ASCII formatted time series and cross power files are what the DaR project acquired and converted into EDI format for this data release using open-source software developed by the DaR project team (Wight, D.E., 1988). The Python code, supplemental resources, and associated readme are available as a USGS software release (https://doi.org/10.5066/F71Z43P9).
The scientific legacy of the USGS is the data and the scientific knowledge derived from it gathered over 130 years of research. However, it is widely assumed, and in some cases known, that high quality data, particularly legacy data critical for large time-scale analyses such as climate change and habitat change, is hidden away in case files, file cabinets, and hard drives housed in USGS science centers and field stations (both hereafter “science centers”). Many USGS science centers, such as the Fort Collins Science Center, have long, established research histories, are known repositories of data sets, and conduct periodic “file room cleanout” days that establish and enforce some minimal data lifecycle management...


    map background search result map search result map Developing a USGS Legacy Data Inventory to Preserve and Release Historical USGS Data Magnetotelluric Data from the San Andreas Fault, Parkfield CA, 1990 Magnetotelluric Data from the San Andreas Fault, Parkfield CA, 1990: ASCII Data Magnetotelluric Data from the San Andreas Fault, Parkfield CA, 1990: EDI Data Magnetotelluric Data from the San Andreas Fault, Parkfield CA, 1990: Binary Data Magnetotelluric Data from the San Andreas Fault, Parkfield CA, 1990 Magnetotelluric Data from the San Andreas Fault, Parkfield CA, 1990: ASCII Data Magnetotelluric Data from the San Andreas Fault, Parkfield CA, 1990: EDI Data Magnetotelluric Data from the San Andreas Fault, Parkfield CA, 1990: Binary Data Developing a USGS Legacy Data Inventory to Preserve and Release Historical USGS Data