A Comparative Study Of Linear And Sporadic Geographical Surveys In The Agricultural-Pastoral Interlaced Zone Of Inner Mongolia

Land survey is an extremely important basic survey of national conditions and national strength deployed by the state council.In the second national land survey,linear expressions were used for river,railway,highway,pipeline land which did not meet the width of the above figure(the width of the above figure is less than 2 mm),as well as ditches,forest belts,farmland barriers,rural roads and other linear objects whose width is more than or equal to 2 meters.For the map spots that do not meet the requirements of the above figure(400 square meters for urban villages and industrial and mining land,600 square meters for cultivated land and garden land,and 1500 square meters for other land types)and need to be expressed,point-like surface features can be expressed.In the actual change survey,it causes some practical problems,such as complicated statistics,incorrect statistics and disordered data.With China's social and economic development entering the new normal,especially the situation and tasks faced by land and resources management have also undergone significant changes.In the 19 th and quite a long time in the future,to build a new mode of ecological civilization,change,natural resource management,natural resources unified approval to register,wetland restoration and protection,returning farmland to forest and grassland reclaimation,cultivated land protection,strengthening the construction of high standard basic farmland etc will gradually developed,and the comprehensive social from all walks of life and the general public to the basic data of land and resources are put forward newer,more refined,higher request,the original technology under the land survey data has far cannot satisfy the urgent need of the parties can not adapt to the needs of the rapid change period each management work.It is urgent to carry out a new round of land survey and form new land survey results through new survey techniques and methods,so as to effectively meet the needs of various levels of the country,all walks of life,land and resources management and other related work.Based on the comparative study of linear features and sporadic features in two land surveys,the following conclusions are drawn :(1)the differences in survey methods and results between the two surveys due to the different accuracy requirements of linear features and sporadic features.The problems existing in the application of the results of the two investigations are analyzed in detail,and the similarities and differences between them are put forward.(2)sorted out the problems and reasons existing in the survey methods,survey results and data results of two surveys of linear features and sporadic features,and put forward relevant Suggestions;(3)the possible problems in the management and later maintenance of the survey data of the two times were preliminarily sorted out,and Suggestions for the management and maintenance of the survey data of linear and sporadic ground objects in the future were put forward.In the future,there are Suggestions on the renewal mechanism of linear features and sporadic features.