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土地是人类赖以生存的场所和生产资料。土地类型图作为从事土地类型研究的重要手段和最终成果的一种表现形式,已越来越被人们所认识。全国1:100万土地类型图已列入全国科学发展规划、全国自然科学地学规划有关项目的重要内容,从而促进了各省(区)土地类型研究和制图工作的全面开展。1:50万吉林省西北部土地类型图,是为配合全国1:100万土地类型图的编制所取得的阶段性成果之一。它是一种中比例尺的专题地图,是1:50万吉林省土地类型图的重要组成部分。本制图区介于东经121°20′～126°,北纬44°～46。16′之间,地跨两个自然地区——温带湿润、半湿润地区和温带半干旱地区。地貌上除东南端属大黑山中段丘陵、西北隅为大兴安岭山地东麓低山丘陵外,基本上属于松嫩平原。行政区划上包括白城地区全部及长春地区一部分。
Land is the place and means of production upon which mankind depends. As a manifestation of the important means and the final result of land type research, the land type map has been more and more recognized. The 1: 1 million land type map of the country has been included in the national scientific development planning and the important content of the national natural science geosciences planning projects, thus promoting the comprehensive development of land types research and cartographic work in all provinces (regions). 1: 500000 The type map of the land in the northwest of Jilin Province is one of the milestones achieved in compiling the map of 1: 1 million land types in China. It is a medium-scale thematic map which is an important part of the 1,500,000 land type map of Jilin Province. The mapping area ranges from 121 ° 20 ’to 126 ° E and 44 ° N to 46.16 ° N, spanning two natural areas - temperate humid and semi-humid areas and temperate semi-arid areas. In addition to the topography of the southeastern end of the mountains in the middle of Montenegro, the northwestern corner of the Daxinganling mountains east of the hilly, basically belongs to the Songnen Plain. Administrative divisions include all of the Baicheng area and Changchun area.