浅谈我国土壤背景值制图

本文介绍了土壤背景值制图及其与其他地球化学图的异同;并在论述了国内外土壤背景值制图的方法及发展状况的基础上,指出制图的技术关键在于制图单元的选取和数值的分级.制图单元可根据资料的完整性及地质环境特征宜地选取,而数值的分级,尽管现有的方法各有所长,但要使所制的图在确实能够反映土壤地域差别的同时具有较强的可比性,就应力求建立统一的原则.

ELEMENTARY INTRODUCTION ON MAP-MAKING OF SOIL BACKGROUND VALUE IN OUR COUNTRY

Map-making of soil background value,development of the methods on charting and the differences of this map from gecochemocal map are introduced on this paper.lt is point out that the keys of map-making are selection of charting units and gradation of background value data. The map units can be chosen in the light of special regional feature, such as present materials and the sources of the materials, ect. Though each essential established way of grading value has its own strong points, it is necessary that we should do our best to set up coordinate principle for making the map which is a reflection of not only soil regional difference but having more comparison.