【正文】 ....................... 5 技術(shù)思路 .............................................................................................................................. 5 技術(shù)方法 .............................................................................................................................. 5 農(nóng)用土地分等的方法 .................................................................................................. 5 3 系統(tǒng)的工作流程 ............................................................. 7 主要步驟 .............................................................................................................................. 8 農(nóng)用地分等技術(shù)流程圖 ......................................................................................................... 9 4 系統(tǒng)主要功能模塊 .......................................................... 10 系統(tǒng)主要的功能模塊 ...........................................................................................................10 數(shù)據(jù)輸入模塊 ...........................................................................................................10 圖層管理模塊 ........................................................................................................... 11 農(nóng)用地分等模塊 ........................................................................................................13 輸出模塊 ..................................................................................................................14 系統(tǒng)幫助 ..................................................................................................................14 系統(tǒng)功能模塊總圖 ...............................................................................................................15 子系統(tǒng)功能模塊圖 ...............................................................................................................15 數(shù)據(jù)輸入模塊 ...........................................................................................................15 圖層管理模塊 ...........................................................................................................17 農(nóng)用地分等模塊 ........................................................................................................18 5 用戶界面 .................................................................. 19 部分用戶界面圖 ..................................................................................................................19 部分模塊用戶界面 ...............................................................................................................24 農(nóng)用地分等因素因子值得計算 .............................................................................................25 6 數(shù)據(jù)庫建立 ................................................................ 26 空間數(shù)據(jù)庫建立 ..................................................................................................................26 空間數(shù)據(jù)庫的概念建立 .............................................................................................26 空間數(shù)據(jù)庫數(shù)據(jù)結(jié)構(gòu) .................................................................................................26 空間數(shù)據(jù)庫的建立 ....................................................................................................26 屬性數(shù)據(jù)庫的建立 ...............................................................................................................26 屬性數(shù)據(jù)庫的概念設(shè)計 .............................................................................................26 屬性數(shù)據(jù)庫的數(shù)據(jù)結(jié)構(gòu) .............................................................................................27 屬性數(shù)據(jù)庫的建立 ....................................................................................................27 數(shù)據(jù)庫部分屬性結(jié)構(gòu)表 .............................................................................................27 數(shù)據(jù)字典 .............................................................................................................................28 數(shù)據(jù)元素 .........................................................................................................................29 數(shù)據(jù)結(jié)構(gòu) ..................................................................................................................29 數(shù)據(jù)流 ......................................................................................................................29 處理過程 ..................................................................................................................29 2 數(shù)據(jù)字典的用途 ........................................................................................................29 部分計算機處理流程圖 ..................................................... 30 計算機處理流程總圖 ...........................................................................................................30 部分計算機處理流程圖 ........................................................................................................31 農(nóng)用地自然生產(chǎn)潛力確定 ..........................................................................................31 土壤質(zhì)地分確定 ........................................................................................................32 剖面構(gòu)型分確定 ........................................................................................................33 有機質(zhì) /%分值確定 ....................................................................................................34 值分值確定 ...........................................................................................................35 障礙層深度 /cm 分確定 ..............................................................................................36 排水條件分確定 ........................................................................................................37 灌溉保證率 /%分值確定 .............................................................................................38 土壤污染狀況分值確定 .............................................................................................39 地下水埋深 1cm 分值確定 ........................................................................................40