natural grade line 中文意思是什麼
natural grade line
解釋
天然地平線-
Based on the analysis of natural and geographic background of jiaozhou land type, under the principle of comprehensiveness, dominant factor, produce and practice, thd author made field investigathion and the defined thd line of land type with reference of 1 : 15000 aviation chart, geologic map, topographic map, soil map, and climate planning map of jiaozhou. the system of land classification included land unit ( genus ) - land unit ( family ), furthermore, according to thd above classification system, the author drew thd 1 : 50000 land type map. finally, this thesis elaborated thd main characters, utilizing situation and of grade - 2 land type land unit genus
膠州市土地類型的劃分，是在分析膠州市土地類型區域自然地理背景，剖析各土地分異因素，按照綜合性原則、主導性原則和實踐性原則，應用1 ： 1 . 5萬航空象片，進行野外實地考察，並參考該市的地質圖、地貌圖、土壤圖、土地詳查圖和氣候區劃圖，在綜合分析的基礎上，確定土地類型界限，以限區（屬） ?限區（科）構成土地分類系統，並據此編制膠州市1 ： 5萬土地類型圖。
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