topographic maps的用法和樣例：
例句
- The analysts drew the results as vectors on a big topographic map for firefighters to see.
這些分析師在大張的地形圖上以向量繪制出結果，方便消防人員理解。 - The ellipsoidal model is commonly used to construct topographic maps and for other large and medium scale maps that need to accurately depict the land surface.
橢球面模型則一般用來(lái)構建地形圖或其他大中比例尺地圖，以獲得對地面形態(tài)更準確的描述。
