DEM : Digital Elevation Model
- Brief description : defines the Digital Elevation Model (DEM) as a grid file.
- Additional information : the DEM is used to compute the depth as the difference between the Z coordinate of the DEM
and that defined by the grid geometry :
- File type : unformatted ASCII
- Index of the file path in ATLAS.fnames : 3
- Parameters to be set :
| NAME |
TYPE |
DESCRIPTION |
UM |
HEADER |
- |
identification string (skipped by ATLAS) |
- |
NROW |
integer |
number of rows of the grid |
- |
NCOL |
integer |
number of columns of the grid |
- |
XMIN |
real |
min. X value of the grid |
\(length\) |
XMIN |
real |
max. X value of the grid |
\(length\) |
YMIN |
real |
min. Y value of the grid |
\(length\) |
YMIN |
real |
max. Y value of the grid |
\(length\) |
ZMIN |
real |
min. Z value of the grid |
\(length\) |
ZMIN |
real |
max. Z value of the grid |
\(length\) |
Z[NROW,NCOL] |
real |
Z values of the grid |
\(length\) |
HEADER
NROW NCOL
XMIN XMAX
YMIN YMAX
ZMIN ZMAX
Z[NROW,NCOL]
- Example [Flat DEM] : this example defines a flat DEM at Z =
0.0 :
DSAA
2 2 ! NROW NCOL
-9000000.0 9000000.0 ! XMIN XMAX
-9000000.0 9000000.0 ! YMIN YMAX
0.0 0.0 ! ZMIN ZMAX
0.0 0.0
0.0 0.0 ! Z[NROW,NCOL]