基于空间分析的航空物探专题底图制作方法——以达州—华蓥测区为例

doi:10.11720/wtyht.2022.1111

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Abstract

Geographical base map is an important basic step and component of airborne geophysical thematic map; nevertheless, the previous treatment methods seem to be rather complicated. This paper analyzes the function and present situation of the thematic base map of aero geophysical exploration and introduces the spatial analysis method. With 1:250 000 public versions of terrain data, this paper discusses the idea and method of compiling the thematic base map of aerial geophysical exploration, and completes the vectorization of geographical elements. The Dazhou-Huaying survey area in Sichuan Province is chosen to perform test. It is shown that the basemap designed by this method is simple and practical and, compared with previous processing methods, it is more intelligent, and that the production results are fast and accurate and can meet the relevant precision requirements. This method provides a strong support for the accurate production of airborne geophysical thematic maps, and it is easy to use. At the same time, it also lays a foundation for the development of airborne geophysical exploration.

Key words： spatial analysis method aerial geophysical exploration geographic base map GIS

Received: 02 March 2021 Published: 03 January 2023

ZTFLH:

P631

Corresponding Authors: GAO Shan E-mail: agrszhangqj@163.com;shannely@163.com

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	Articles by authors
	Qi-Jie ZHANG
	Hong-Yu YAN
	Ting-Ting ZHANG
	Yun WU
	Shan GAO

Cite this article:

Qi-Jie ZHANG,Hong-Yu YAN,Ting-Ting ZHANG, et al. The method of making the airborne geophysical thematic base-map based on spatial analysis: Exemplified by the Dazhou-Huaying survey area[J]. Geophysical and Geochemical Exploration, 2022, 46(5): 1251-1257.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1111 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I5/1251

The position diagram of study area

Making road-map of special base map of aerial geophysical exploration

The original 1:250,000 public edition topographic map of the study area

Part of the 1:250,000 terrain data (a)and 1:4,000,000 terrain data (b) comparison map

Comparative effects of different buffer radius of 200 m (a), 500 m (b) and 700 m (c) established by river systems in the study area

The highway’s attribute information table of 1:250,000 topographic map

Contrast map of original highway (a) and extracted highway (b)

The original residential area information (a) and the extracted residential area information (b)

The elements for thematic base-map elements of airborne geophysical exploration

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