Using materials of radar mapping from spacecrafts as a way to increase reliability, as well as to reduce the cost and time of site selection for extended linear construction projects
Table 2.
Accuracy of information ondigital elevation models.
|
| Parameter |
SRTM |
ASTER GDEM |
ALOS AW3D |
MERIT DEM |
|
|
| Spatial resolution |
1'' х 1'' |
1'' х 1'' |
from 1" x 1" (30x30 m) – open source data; up to 0.1" x 0.1" (2.5 x 2.5 m) – commercial version. |
3'' х 3'' |
|
| Coverage |
60°N 56°S |
83°N 83°S |
All the world |
90°N 60°S |
|
| Elevation accuracy evaluation |
16 m |
20 m |
5 m |
9 m |
|
| Accuracy evaluation in plan |
20 m |
30 m |
5 m |
12-14 m |
|
|
|
|
