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Core Log Integration Platform

If you have any questions regarding CLIP software, please contact Sean Higgins (sean@ldeo.columbia.edu, 845-365-8695).

The CLIP (Core-Log Integration Platform) software provides the ODP community with a set of graphic, interactive data analysis products for depth-merging and integrating core and downhole log data. These graphically oriented, and intuitive products are for use on the ship or on shore-based Unix workstations. Splicer (current version: 2.2) and Sagan (current version: 1.2) have expanded data handling flexibility considerably, allowing for access to a variety of non standard data types and formats in addition to current Janus database output files.

Splicer

Splicer is installed on Sun workstations on the JOIDES Resolution and allows interactive depth-shifting of multiple holes of core data to build composite sections using an optimized cross-correlation approach. Multiple data types can be compared simultaneously in order to quickly determine the best correlation for all variables. On legs where it is important to recover complete "spliced" sediment sections, a "Stratigraphic Correlator" will be staffed in order to provide real time feedback on the completeness of the recovered sediment record to help determine operational and drilling plans. Splicer has been used routinely on the JOIDES Resolution to build continuous sediment records since Leg 151 (1993). Metadata files generated by this program are now formally included in the JANUS database. Splicer also allows the composite section to be compared.

Some example applications are:

Sagan

The addition of the Sagan program now allows the composite sections output by Splicer to be mapped to their true stratigraphic depths, unifying core and log records and providing a crosscheck on the completeness of the composite section. Sagan generates a single metafile that defines a set of precise depth correlations between core and log datasets at any given site. This metafile provides the foundation for core-log data integration, as it establishes the unique mapping function linking the two independent depth scales. The program performs the core-log depth merging using physical parameters which are measured on both cores by logs (e.g. natural gamma, bulk density, porosity, magnetic susceptibility, sonic velocity). The core-log depth correlations are conducted either manually (e.g., core-by-core from single or multiple holes) or automatically. Sagan can also perform smoothing, decimation, and culling procedures to modify the data. The program can manage up to 10 holes of core data, 5 data types, nearly an infinite number of cores and data points and up to 3 reference log curves. The resulting core-log timelines can be applied across equivalent mcd depths in different holes or just for individual cores.

Some specific example applications are:

Minimum System Requirements

Splicer and Sagan are designed to run on Sun workstations using Solaris and the OpenWindows, Motif (mwm), or CDE (dtwm) window managers. Large screen monitors are highly recommended.

The most recent versions of Splicer and Sagan are available for download here.

Instructions for the operation of Splicer and Sagan are available in the CLIP Manual.

We have recently achieved success accessing CLIP software over a Unix network using a Mac OS X workstation with an X-windows emulator. This will allow users who have access to a Unix network, but who do not have a Unix workstation, to make use of the CLIP software from their desktop. Instructions for running the software in this configuration are available in the CLIP manual.

Sign up for the CLIP mailing list here.

Both Splicer and Sagan were developed by Peter deMenocal and Ann Esmay.


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