堆積地貌 依照方格將地形圖上已選定的低等高線,能控制地貌基本形狀的等高線,以及山頂,鞍部,山腳,傾斜變換點(diǎn)和江河等到的位置畫(huà)到沙盤面上.

According to the grid, the lowest contour line selected on the topographic map, the contour line which can control the basic shape of the landform, and the positions of the top, saddle, foot of the mountain, inclined transformation point and river are drawn on the sand table

將計(jì)算好的山頂,鞍部,山腳,傾斜變換點(diǎn)和江河彎曲部等起伏明顯的點(diǎn)分別標(biāo)明高度。

Mark the height of the top of the mountain, saddle, foot of the mountain, inclined transformation point and bend of the river.

在低等到高線范圍內(nèi),以標(biāo)明的高度和等高線為依據(jù),先堆出山頂,鞍部,山背等的概略形狀作為骨干,再修整其他部分.如沙盤較大,可分片堆積,先堆積進(jìn)出困難處,后堆積進(jìn)出方便處.堆積時(shí),應(yīng)隨時(shí)對(duì)照地形圖,以正確顯示地貌的起伏狀況,并應(yīng)隨時(shí)將沙土壓緊,以免崩塌變形.如有較大的江河,湖泊,應(yīng)在修整地貌時(shí)一并挖成.堆積完畢,應(yīng)作全面檢查和修整。

Within the range of the lowest contour line, according to the marked height and contour line, first pile up the outline shape of the top, saddle, back of the mountain as the backbone, and then trim other parts. If the sand table is large, it can be piled up in pieces, first pile up the difficult parts, and then pile up the convenient parts. When stacking, it should be compared with the topographic map at any time to correctly show the ups and downs of the landform, and the sand should be compacted at any time, If there are large rivers and lakes, they should be excavated at the same time when trimming the landform. After the accumulation, they should be checked and trimmed comprehensively.

設(shè)置地物

Setting up features

沙盤上的地物,如房屋,鐵路,橋梁,樹(shù)木和獨(dú)立地物等,多用相似的模型表示,公路和鄉(xiāng)村路的寬窄不等,不同的顏色表示；江河用藍(lán)色表示;樹(shù)林用小樹(shù)枝或綠色表示。地物的大小,應(yīng)與水平比例尺相適應(yīng),關(guān)系位置要求正確.設(shè)置地物,應(yīng)按水系,居民地,道路,樹(shù)林和獨(dú)立地物的順序進(jìn)行設(shè)置.后,在相應(yīng)的位置上插上地名,江河名,山名和高程注記等標(biāo)識(shí)。

The features on the sand table, such as houses, railways, bridges, trees and independent features, are usually represented by similar models. The width of roads and country roads varies, and different colors are used to represent them. Rivers are represented by blue. Trees are represented by twigs or green. The size of the features should be adapted to the horizontal scale, and the relationship position should be correct. The features should be set according to the sequence of water system, residential area, road, forest and independent features. Finally, place name, river name, mountain name and elevation mark should be inserted on the corresponding position.