一、问题的提出地形图对金属矿区的重力勘探来说,很重要。在金属矿区,一般来说,重力异常不大,而地形较复杂,因此我们需要大比例尺的地形图。可是,在目前我国地质勘探中,测量工作还未能赶上地质的需要,所以在很多金属矿区上没有地形图,或者虽然有,但比例尺太小,此外在有些矿区,虽然有着大比例尺的地形图,但是随着地质重型山地工作的进展,地形面貌日新月异,原来的地形图很快就不合重力勘探的要 First, the issue put forward Topographic maps of the gravity exploration of metal mines, it is very important. In metal mines, in general, there is not much gravity and the terrain is more complicated, so we need a large scale topographic map. However, at present, China’s geological exploration, the measurement has not yet caught up with the geological needs, so there is no topographic map in many metal mines, or though, but the scale is too small, in addition to some mines, although with large-scale topography However, with the progress of geological heavy mountain work, the topography changes rapidly and the original topographic map soon becomes out of the need of gravity exploration