地形图上的数字是什么意思?
这个小的384代表什么?41、42是分带号吗?
推荐回答(4个)
地形图边上的数字种类繁多,要与周围的符号结合起来才能判断数字的意思。
看地形图口诀:
地图方位:面对地图看, 上北下是南, 左西右为东, 地图方位已辩明。
地图符号颜色识别: 绿为林地蓝为水, 地貌、公路棕色绘 其它符号都用黑。
等高线显示地貌特点: 等高闭合是规律, 弯曲形状象现地, 线多山高线少低, 坡陡线密坡缓稀。
等高线显示地貌原理: 由底到顶,高度相等; 水干切开,垂直投影。
地貌识别: 山顶凹地小环圈, 区别要看示坡线; 山顶短线向外指, 凹地短线向里边。 山背曲线向外凸, 山谷曲线向里弯; 山背凸棱分水线, 山谷凹底合水线。 两山相连叫鞍部, 高低两组等高线; 群山相连最高处, 棱线称为山脊线。
地形起伏判定: 总观地貌形态, 辨明各处高低; 区分上坡下坡, 沿线编号注记。
四种地形地物分布规律: 山成群,形似脉, 小山多在大山内; 先抓大山做骨干, 记了这脉记那脉。 上游窄,下游宽, 多条小河汇大川; 河名顺着河边写, 流向流速看注记; 桥梁渡口有几处, 深度底质要熟悉。
道 路: 平原地,多而宽, 山丘地,窄而少, 山区若是有大路, 多沿河旁和山谷。
居民地: 平原密,山区稀, 要记村镇有规迹; 桥、堡、店、镇靠公路, 沟、涧、岭、峪在山区; 泡、湾、河、洼顺水找, 村、屯、庄、窑多散居。
地物符号定位点确定方法: 两个图形下中央, 方圆三角当中量; 底部宽大底中间, 下有直角角顶上。
地形图上的数字表示该地的海拔高度和地形起伏。这些数字通常被称为等高线,是地形图上最重要的信息之一。
首先,数字的绝对值表示该点的海拔高度。例如,数字100表示该点海拔为100米,数字500表示该点海拔为500米。
其次,数字的变化表示地形的起伏。例如,当数字从100增加到200时,表示地形从平坦变为相对较高;当数字从200减少到100时,表示地形从相对较高变为平坦。
此外,地形图上的数字还可能与周围的地物符号结合起来,以更准确地描述地形。例如,一个点的数字可能是表示某个地物的高度,而另一个点的数字可能是表示某个河流的深度。
总之,地形图上的数字是用来描述地形的重要工具,对于了解一个地区的地形特征和地貌特征非常重要。
这是方里网数据,前一个单位是百公里,后一个单位是公里。
合起来是38441公里-38442公里(方里网是有别于经纬网的另外一种地理坐标系)
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