BETA - DATA MODEL NOT RELEASED FOR
PRODUCTION
GEOID09
[2009 Mar 09]
CONUS, Alaska, Hawaii, American Samoa, Guam, Northern Marianas Islands and Puerto Rico/Virgin Islands files available
Description
For working with the GEOID09 model,
two computer programs are provided as compiled executables for both PC Win32
(INTG.EXE and XNTG.EXE) and Sun Unix (INTG and XNTG) platforms, along
with the source code (intg_v220.zip and xntg_v11.zip). INTG interpolates
geoid heights from data files using user-provided coordinates. XNTG
extracts sub-grids from the binary data files, converts back and forth
between binary and ASCII data formats, and gives statistics about a data
file.
To use GEOID09, download an INTG
executable and at least one data file. 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 eight data files have now been switched to the native
format of Intel based PCs (little-endian). Users desiring IEEE Std. 754
binary format should process the desired files through XNTG (in a Unix
environment) and select option 2. The user should select the default
spatial extents for the output file. Give the output file a unique name
and then change it to the input file name after the XNTG program is
complete. The resulting file will cover the same range as the original
file but will be byte-swapped. Repeat as necessary for the desired number
of files. Program intg (both platforms)
automatically tests for little-endian or big-endian condition.
Information
BETA - DATA MODEL NOT RELEASED FOR
PRODUCTION
Programs
BETA - DATA MODEL NOT RELEASED FOR
PRODUCTION
Data
- Graphical Interface- click on the desired image grid to download a binary file
BETA - DATA MODEL NOT RELEASED FOR
PRODUCTION
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: 3,886,292 bytes)
- Grid
#2 (58 - 40 N & 247 - 266 E, size: 3,958,149 bytes)
- Grid
#3 (58 - 40 N & 264 - 283 E, size: 3,761,091 bytes)
- Grid
#4 (58 - 40 N & 281 - 300 E, size: 4,116,917 bytes)
- Grid
#5 (42 - 24 N & 247 - 266 E, size: 3,852,387 bytes)
- Grid
#6 (42 - 24 N & 247 - 266 E, size: 3,967,923 bytes)
- Grid
#7 (42 - 24 N & 264 - 283 E, size: 3,825,660 bytes)
- Grid
#8 (42 - 24 N & 281 - 300 E, size: 3,948,808 bytes)
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)
Guam
and Northern Marianas Islands
- Binary Grid (181 columns
by 421 rows ; 304,848 bytes in size)
- Compressed ASCII grid
- Grid
#1 (11 - 18 N & 143 - 146 E, size: 232,559 bytes)
American Samoa
- Binary Grid (361 columns
by 361 rows ; 521,328 bytes in size)
- Compressed ASCII grid
- Grid
#1 (17 - 11 S & 186 - 192 E, size: 426,866 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: 339,759 bytes)
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