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LDT Documentation

LDT Documentation

The latest version of LDT documentation can be downloaded from the below Modeling Guru links.
 
The official LDT technical description paper:
Arsenault, K.R., S.V. Kumar, J.V. Geiger, S. Wang, E. Kemp, D.M. Mocko, H.K. Beaudoing, A. Getirana, M. Navari, B. Li, J. Jacob, J. Wegiel, and C.D. Peters-Lidard, 2018: The Land surface Data Toolkit (LDT v7.2) – a data fusion environment for land data assimilation systems. Geosci. Model Dev., 11, 3605-3621, doi:10.5194/gmd-11-3605-2018
 
For LDT 7.2 Documentation, please visit:
 
For LDT 7.1 Documentation, please visit:
LDT 7.1 Tutorial (31 Aug 2015)
 

For additional information, please also visit our LIS FAQ page.

 
A few helpful LDT terms to be familiar with:
 
"Native" files:   Where the user is able to read in parameter files in sort of their "native" state from their original data source, like NCEP or NCAR.
 
LIS-team processed files: Where the user reads in parameter files, originally processed by the LIS team, that are in a specific binary-format (*.1gd4r = direct-access, big-endian 4-byte reals) and have the "UMD" landmask imposed. These files are commonly referred to as "LIS-data".
 
The "Fill" options: Where the user can select options to "fill" in a missing or "water-based" parameter value where a valid mask point indicates "land" is present. Options include how many neighboring values to search (the "radius") and a set default value if no neighboring values are found. The "fill" step occurs after an input parameter field has been spatially transformed to the LIS output grid.
 
Please note that LDT continues to be developed with the support of the LIS community, so please check back for updates to the code and documentation.