Spatial Analysis of Geological Hazard Points in Dali City

Authors:

Yuhong Wang

Keywords:

Remote sensing imagery，DEM，Geological disaster point，GIS，Spatial position，Slope， Slope direction，Dali City

Doi:

https://doi.org/10.70114/acmsr.2025.3.1.P293

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Abstract

This paper utilizes remote sensing image data, DEM data, and geological disaster survey data from Dali City, Yunnan Province. By applying GIS technology, it extracts the slope and aspect data of Dali City and conducts spatial analysis on geological disaster points in the city. The analysis covers the spatial distribution, elevation distribution, slope distribution, and aspect distribution of geological disaster points in Dali City.By analyzing the data, the geological hazard points in Dali City are mainly distributed within the altitude range of 1500m-2500m, with the highest number of geological hazard points within the slope range of 5 ° -35 °. The distribution of geological hazard points in the slope direction is relatively balanced.The data analysis results provide technical reference for disaster prevention and reduction in Dali City.