Resources Frequently asked questions TransLT What types of GRID files does TransLT support?
|
File extension |
Format |
File description |
Applied to |
|
.grd |
Binar |
ANCPI format |
(N, E) sau h |
|
.gsb1 |
Binar |
Format ntv2, files with multiple grids that cover more areas. The grids can have sub-grids attached. |
(φ, λ) |
|
.dat |
Binar |
Format ntv1 |
(φ, λ) |
|
.lla |
ASCII |
Latitude and longitude corrections in ASCII format. |
(φ, λ) |
|
.las / .los2 |
Binar |
NADCON format. |
(φ, λ) |
|
.94 |
Binar |
VERTCON format. |
h |
|
.bin |
Binar |
NGS format. |
h |
|
.byn |
Binar |
GSD format. |
h |
|
.sid |
ASCII |
NZGeoid09 format. |
h |
|
.grd3 |
ASCII |
NGA/NASA |
h |
|
.txt |
ASCII |
OSGM02 |
H |
|
.txt |
ASCII |
OSTN02/OSGM02 |
(N,E,H), (N,E) or H |
Note1: For the .gsb files that contain sub-grids the interpolation is made in the last sub-grid in which the point is found. Firstly is searched for the main grid in which the point is found after which it is searched for in all its descendents. If the point is inside a sub-grid then this sub-grid is used for interpolation.
Note2: The .las and .los files are used together. For selection one of the two files will be selected.
Note3: Because the files with the .grd extension can be both Binary and ASCII then in order for the program to identify correctly if an ASCII file is selected then you must choose in the selection window of the grid file the type of file as being ASCII geoid model grid file (*.grd). In this case the program will record that the .grd selected file is ASCII format otherwise any selected .grd file will be considered as being Binary.
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