NLDAS Specifications
The NLDAS domain extends from 25 to 53 North and -125 to -67 West.
The NLDAS Grid is defined as follows:
(latitude/longitude values represent center of 1/8th-degree grid boxes)
| Position | Grid Column | Grid Row | Longitude | Latitude |
|---|---|---|---|---|
| Lower Left | 1 | 1 | -124.9375 | 25.0625 |
| Lower Right | 464 | 1 | -67.0625 | 25.0625 |
| Upper Right | 464 | 224 | -67.0625 | 52.9375 |
| Upper Left | 1 | 224 | -124.9375 | 52.9375 |
NLDAS Unified Mask
The image and data files in this section are for the NLDAS unified
mask and are based on unadjusted 1-km University of Maryland vegetation
data. This NLDAS unified mask is used in all NLDAS modeling efforts.
NLDAS unified land/water mask (JPEG, 22kb)
- (Binary) - NLDASmask_UMDunified.bin
This file contains the NLDAS unified land/water mask in binary format. You may find NLDASmask_UMDunified.F90 helpful to read the file, as well as a NLDASmask_UMDunified.ctl GrADS control file. - (ASCII) - NLDASmask_UMDunified.asc
This ASCII file contains the NLDAS unified land/water mask in the following format:
Column 1 Grid Column Number Column 2 Grid Row Number Column 3 Latitude (center of 1/8th-degree grid boxes) Column 4 Longitude (center of 1/8th-degree grid boxes) Column 5 Mask Value (0 = Water; 1 = Land)
NLDAS Mask over CONUS
The image and data files in this section are for a mask over
the CONUS (contiguous United States) region of the NLDAS domain.
NLDAS CONUS mask (GIF, 28kb)
- (Binary) - NLDASmask_CONUS.bin
This file contains the NLDAS CONUS mask in binary format. You may find NLDASmask_CONUS.F90 helpful to read the file, as well as a NLDASmask_CONUS.ctl GrADS control file. - (ASCII) - NLDASmask_CONUS.asc
This ASCII file contains the NLDAS CONUS mask in the following format:
Column 1 Grid Column Number Column 2 Grid Row Number Column 3 Latitude (center of 1/8th-degree grid boxes) Column 4 Longitude (center of 1/8th-degree grid boxes) Column 5 Mask Value (0 = outside of CONUS; 1 = CONUS)