求翻译：利用90×90米DEM数据生成尼日利亚全国地形图是什么意思？

90 × 90 米 use DEM data to generate national topographic map of Nigeria

Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, sysadmin@babylon.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.

Produces the Nigerian nation topographic diagram using 90×90 the rice DEM data

Using 90x90 meters DEM data generation Nigerian national topographic map

Using 90x90 meters DEM data generation Nigerian national topographic map