In general , a firm begins collecting all kind of materials about economy development and environment after accepting a assignment , and then studying a feasible path based on one of these materials individually . these suitable paths will be compared and outline a final solution 一般情况下，公路设计单位在接受设计委托后，要开始收集项目影响区经济、交通发展资料和地质水文普查资料、各种比例的地形图等资料，然后在此基础上，对单个条件进行研究，再就可能的方案总体对比，才编制出该工程的线路规划方案。
Trough overlaying of landform , parent material and soil maps , soter unit database is developed . moreover , soter land resource database was established based on soter unit map and climate region map . soter land use database was built based on china land use classification and soter socio - economical database is built base on statistical data 在此基础之上，更新土壤属性生成母质图，进而利用土壤普查资料中的剖面记载与剖面描述将邯郸地区土壤发生分类转换为系统分类，邯郸地区存在雏形土、新成土、有机土、人为土、盐成土五个土纲十三个土类二十一个亚类。
The county of changling , located in the eastern edge of songnen sands , is a typical ecotone between agriculture and husbandry in northern china . in the viewpoint of land use / land cover change , it is an ideal district for research . in this thesis , we make use of the remote sensed data , the land use map , statistical data such as soil general data and field - measured data to analyze the land use change of changling county of the latest 20 years between 1981 and 2000 under the support of gis , and further we make some preliminary study on the impacts of land use change to regional climate and soil conditions 本文以位于松嫩沙地东缘、我国北方农牧交错带典型区域的长岭县作为研究区，利用遥感数据、土地利用数据、土壤普查资料和野外采样、室内测量等数据，在gis的支持下，对长岭县1981 - 2000年间的土地利用变化进行了研究，并在此基础上，探讨了土地利用变化对区域气候要素和土壤环境要素的影响，为长岭县土地利用优化策略的制定提供依据。
This thesis is based on on - site inspection and questionnaire survey , combined the national agricultural census materials , used peasant household ' s behavior model and relevant theory , adopted the metric economic analytical methods and empirical analytical methods , have carried on more overall analysis and studied to the questions , such as peasant household ' s decision behavior characteristic and influence factor in the agricultural structural adjustment in zhejiang and jiangsu 本文以实地调查和问卷调查资料为基础，结合国家农业普查资料，运用农户行为模型及相关理论，采用数量经济分析方法和实证分析方法，对浙江、江苏两省农户在农业结构调整中的决策行为特征及其影响因素等问题，进行了比较全面的分析与研究。
This paper will not deal directly with these research works , but rather will focus on using yield data from several sources including research and demonstration trials , myr results , as well as data collected by survey , to indicate annual production and economic potentials ( or lost opportunities for china by not adopting certain practices or components of myr already tested ) 本文不准备直接讨论这些研究工作，而将注意力集中在利用研究和示范试验、最高产量研究结果和普查资料等方面已有的产量数据，说明年度产量和经济潜力（即不采用最高产量研究已试验过的某些措施和配套技术时中国将失去的机会） 。
