There are studies on SRTM data vertical elevation accuracy, which seem to indicate that there are around an average of 5m vertical error when compared with a DEM derived from cartographic maps.
Obviously, with that kind of error, one can't rely on SRTM to do accurate cut fill calculation. But SRTM can still be useful for preliminary site study, as long as the relative contour lines and essential topological features still remain intact.
My site is an area covered with forest, nearby to a small town ( population around 2000), somewhere in the middle Borneo. I will need to do preliminary site study, like prelim. proposal of roads, drains and important water detention facilities like (man-made) ponds.
Is SRTM good enough in preserving the relative contour lines and essential topological features?