USGG2003
[2011 Feb 09] Intg v3.11
Description
For working with the USGG2003 model, two programs are provided
as source code and as compiled executables for
both Sun Unix (INTG and XNTG) and IBM PC (INTG.EXE and XNTG.EXE)
platforms. INTG will interpolate geoid heights from data files using
user-provided coordinates. XNTG will extract sub-grids from the binary
data files, as well as convert back and forth between binary and ASCII,
or just give statistics about a data file.
To use USGG2003, the INTG executable and at least one data file must be
downloaded. You need only to select those data files that cover your region,
and the program will recognize which files are present. Select one or more of
the data files either by using the graphical or data interfaces.
Due to numerous requests, the binary formats of the
data files are now available in little-endian binary format
for Intel based PCs and also in big-endian binary format
(IEEE Std. 754) for use on Unix platforms.
Download the binary data file for your specific operating system.
Information
Programs
Graphical Interface- click on the desired image grid to download a binary file
Data (non-graphical interface)
Conterminous United States
- Binary Grids (all are 1141 columns by 1081 rows and are 4,933,728 bytes in size)
- Compressed ASCII grids
- Grid #1 (58 - 40 N & 230 - 249 E, size: 3,877,214 bytes)
- Grid #2 (58 - 40 N & 247 - 266 E, size: 3,968,531 bytes)
- Grid #3 (58 - 40 N & 264 - 283 E, size: 3,769,625 bytes)
- Grid #4 (58 - 40 N & 281 - 300 E, size: 4,109,655 bytes)
- Grid #5 (42 - 24 N & 247 - 266 E, size: 3,844,293 bytes)
- Grid #6 (42 - 24 N & 247 - 266 E, size: 3,966,553 bytes)
- Grid #7 (42 - 24 N & 264 - 283 E, size: 3,753,735 bytes)
- Grid #8 (42 - 24 N & 281 - 300 E, size: 3,948,899 bytes)
- Single CONUS Grid (24 - 58 N, 230 - 300 E and 4201 columns by 2041 rows)
Alaska
- Binary Grids (all are 1921 columns by 721 rows and are 5,540,208 bytes in size)
- Compressed ASCII grids
- Grid #1 (60 - 72 N & 172 - 204 E, size: 4,018,443 bytes)
- Grid #2 (60 - 72 N & 202 - 234 E, size: 4,369,794 bytes)
- Grid #3 (49 - 61 N & 172 - 204 E, size: 4,419,956 bytes)
- Grid #4 (49 - 61 N & 202 - 234 E, size: 4,550,775 bytes)
Hawaii
- Binary Grid (421 columns by 361 rows; 607,968 bytes in size)
- Compressed ASCII grid
- Grid #1 (18 - 24 N & 199 - 206 E, size: 476,788 bytes)
Puerto Rico and Virgin Islands
- Binary Grid (301 columns by 361 rows; 434,688 bytes in size)
- Compressed ASCII grids
- Grid #1 (15 - 21 N & 291 - 296 E, size: 339,882 bytes)
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