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Geoid Files for GeoLab |
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GeoLab ships with two world-wide geoid files (see the tables
below) that you can use right away. If you need to use other
geoids, please feel free to download the ones you need.
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About GSP Files (please
read this) |
For each geoid file in the tables below, you can download
the GSP file for that geoid. A GSP file is a small file that
GeoLab uses to interpret the contents of the corresponding
geoid data file.
When you run the Geoid Manager
(Tools/Geoid Manager) and load a GSP file
(using the Open button), you will see the dialog displayed
at the right (click on the picture to see a full size
version).
The left side of this dialog displays the information
contained in the GSP file. For example, the "Data file
layout" group specifies how the geoid binary data file is
structured. The use of the GSP file allows GeoLab to use virtually all of the geoid data files in
existence.
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Important: Note that when you first download the geoid files
and their GSP files, you will have to use the Geoid Manager
to set the "Geoid data file" item in the GSP file. |
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GEOID03 for PCs |
The following geoid data file
links are to the files at the NGS FTP site. Note that these
files are in the binary file format compatible with PCs running
Windows (as opposed to UNIX machines).
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Canadian Geoid Files |
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The Canadian geoid data files (2 minute spacing) are now
freely available here, thanks to the Geodetic Survey Division of Geomatics Canada, Natural Resources Canada.
Please note that these files are
copyright 2001, Her Majesty the Queen in Right of Canada. Natural
Resources Canada, Geodetic Survey Division. All rights reserved. No
Warranty. These digital files are provided on an "as is" basis and
Canada makes no guarantees, representations or warranties respecting
these files, either expressed or implied, arising by law or otherwise,
including but not limited to, effectiveness, completeness, accuracy or
fitness for a particular purpose. Any use whatsoever of these digital
files shall constitute acceptance of all terms and conditions detailed
in the license included with the product documentation. The program GPS·H 2.1 is also
available for download by clicking
here (2 MB). This program allows the determination of orthometric
heights (H, height above mean sea level) at stations where the
geometric heights (h, ellipsoidal height) are measured using the
Global Positioning System (GPS) or other methods. The orthometric
heights are calculated by the intermediary of a geoid model.
We have added the Greater Vancouver Regional District's geoid model
to the end of the list below.
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GEOID 99 Files |
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The latest US geoid data files (1 minute spacing) are freely
available from the
NOAA FTP site.
The geoid data file links in the following table will download the
corresponding data file from that FTP location. Alternatively, you can
download these data files from the
NOAA
web site. |
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| Geoid file |
GSP file |
Description |
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g1999a01.bin (5.3 MB) |
g1999a01GSP.zip |
Alaska 1 (N72 - N60, E172 - E204) |
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g1999a02.bin (5.3 MB) |
g1999a02GSP.zip |
Alaska 2 (N72 - N60, E202 - E234) |
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g1999a03.bin (5.3 MB) |
g1999a03GSP.zip |
Alaska 3 (N61 - N49, E172 - E204) |
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g1999a04.bin (5.3 MB) |
g1999a04GSP.zip |
Alaska 4 (N61 - N49, E202 - E234) |
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g1999u01.bin
(4.7 MB) |
g1999u01GSP.zip |
CONUS 1 (N58 - N40, E230 - E249) |
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g1999u02.bin
(4.7 MB) |
g1999u02GSP.zip |
CONUS 2 (N58 - N40, E247 - E266) |
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g1999u03.bin
(4.7 MB) |
g1999u03GSP.zip |
CONUS 3 (N58 - N40, E264 - E283) |
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g1999u04.bin
(4.7 MB) |
g1999u04GSP.zip |
CONUS 4 (N58 - N40, E281 - E300) |
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g1999u05.bin
(4.7 MB) |
g1999u05GSP.zip |
CONUS 5 (N42 - N24, E230 - E249) |
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g1999u06.bin
(4.7 MB) |
g1999u06GSP.zip |
CONUS 6 (N42 - N24, E247 - E266) |
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g1999u07.bin
(4.7 MB) |
g1999u07GSP.zip |
CONUS 7 (N42 - N24, E264 - E283) |
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g1999u08.bin
(4.7 MB) |
g1999u08GSP.zip |
CONUS 8 (N42 - N24, E281 - E300) |
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g1999h01.bin (594 KB) |
g1999h01GSP.zip |
Hawaii (N24 - N18, E199 - E206) |
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g1999p01.bin (425 KB) |
g1999p01GSP.zip |
Puerto Rico and the U.S. Virgin
Islands (N21 - N15, E291 - E296) |
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Other Geoid Files |
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You can download other geoid data files and associated GSP files
by clicking the links in the following table: |
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| Geoid file |
GSP file |
Description |
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AUSGEOID98 bin (4 MB) |
AUSGEOID98 gsp
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Australia (S8 - S46, E108 -
E160) |
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car97e.zip (1 MB) |
car97eGSP.zip |
Eastern Caribbean Sea (N9 - N28,
W73 - W58), CARIB97. |
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car97w.zip (1 MB) |
car97wGSP.zip |
Western Caribbean Sea (N9 - N28,
W86 - W71), CARIB97. |
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*egm96.zip (1.6 MB) |
*egm96GSP.zip |
World-wide (N90 - S90, W180 -
E179.75 NIMA/NASA). |
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geo96.zip (6.5 MB) |
geo96GSP.zip |
Continental US (N24 - N53, W130 -
W66, NGS), Geoid 96. |
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geo96an.zip (1 MB) |
geo96anGSP.zip |
North Alaska US (N60 - N72, W179 -
W128, NGS), Geoid 96. |
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geo96as.zip (1 MB) |
geo96asGSP.zip |
South Alaska US (N51 - N63, W179 -
W128, NGS), Geoid 96. |
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geo96hw.zip (150 KB) |
geo96hwGSP.zip |
Hawaiian Is. US (N18 - N24, W161 -
W154, NGS), Geoid 96. |
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geo96nc.zip (1 MB) |
geo96ncGSP.zip |
North-Central US (N36 - N50, W107 -
W84, NGS), Geoid 96. |
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geo96ne.zip
(1 MB) |
geo96neGSP.zip |
North-Eastern US (N36 - N50, W89 -
W66, NGS), Geoid 96. |
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geo96nw.zip
(1 MB) |
geo96nwGSP.zip |
North-Western US (N36 - N50, W125 -
W102, NGS), Geoid 96. |
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geo96pr.zip
(90 K) |
geo96prGSP.zip |
Puerto Rico, Virgin Islands (N15 -
N21, W68 - W64, NGS), Geoid 96. |
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geo96sc.zip
(1 MB) |
geo96scGSP.zip |
South-Central US (N24 - N38, W107 -
W84, NGS), Geoid 96. |
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geo96sw.zip
(1 MB) |
geo96swGSP.zip |
South-Western US (N24 - N38, W125 -
W102, NGS), Geoid 96. |
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mex97c.zip (876 K) |
mex97cGSP.zip |
Central Mexico (14 - 33N, 109 -
96W, NGS & Instituto Nacional de Estadistica, Geografia e
Informatica), Mexico 97. |
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mex97e.zip
(876 K) |
mex97eGSP.zip |
Eastern Mexico (14 - 33N, 99 - 86W,
NGS & Instituto Nacional de Estadistica, Geografia e Informatica),
Mexico 97. |
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mex97w.zip
(876 K) |
mex97wGSP.zip |
Western Mexico (14 - 33N, 119 -
106W, NGS & Instituto Nacional de Estadistica, Geografia e
Informatica), Mexico 97. |
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*osu91a.zip (1.6 MB) |
*osu91aGSP.zip |
World-wide (N89 52 30 - S89 52 30,
E0 7 30 - E359 52 30, OSU). |
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* Installed with GeoLab. |
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