利用光学卫星和航空影像进行海岸线自动测绘

IF 0.7 Q4 GEOGRAPHY, PHYSICAL

Geographia Technica Pub Date : 2020-09-27 DOI:10.21163/GT_2020.152.17

D. Costantino, M. Pepe, G. Dardanelli, V. Baiocchi

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引用次数: 15

摘要

：在哥白尼方案范围内，卫星平台不断提供和快速获取多光谱数据，这对农业、沿海地区观测、监测土地覆盖变化等不同应用领域的用户来说是一个巨大的机会。本文的目的是确定一种使用Sentinel-2光学卫星图像绘制海岸线的合适方法。该方法利用了遥感领域开发的两个水环境指标：NDWI（Normalized difference water index）和MNDWI（Modified Normalized differential water index）。从绘制这些指数的地图开始，并确定适当的阈值，就有可能推断海岸线。将使用NDWI和MNDWI指数得出的海岸线与通过摄影测量技术获得的非常高分辨率正射照片的光解释获得的海岸线进行了比较。结果表明，可以以接近哨兵2号卫星图像几何分辨率带的内在精度自动快速绘制海岸线图。

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USING OPTICAL SATELLITE AND AERIAL IMAGERY FOR AUTOMATIC COASTLINE MAPPING

: The continuous availability and rapid accessibility to multispectral data from satellite platforms within the Copernicus Programme represents a great opportunity for users in different fields of applications as: agriculture, observation of coastal zones, monitoring land cover change. The aim of this paper is to identify a suitable method to map coastline using Sentinel-2 optical satellite image. The method provides the use of two indexes developed in remote sensing field for water environment: NDWI (Normalized difference water index) and MNDWI (Modified Normalized difference water index). Starting from the construction of maps of these indexes and, identifying appropriate threshold values, it has been possible to extrapolate the coastline. The coastlines derived from the use of the NDWI and MNDWI index were compared with a coastline obtained from the photointerpretation of a very high resolution orthophoto obtained through photogrammetric techniques. The results show that it is possible to map the coastline automatically and quickly with an intrinsic accuracy close to the geometric resolution bands of Sentinel-2 satellite images.

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来源期刊

Geographia Technica GEOGRAPHY, PHYSICAL-

CiteScore

2.30

自引率

14.30%

发文量

期刊介绍： Geographia Technica is a journal devoted to the publication of all papers on all aspects of the use of technical and quantitative methods in geographical research. It aims at presenting its readers with the latest developments in G.I.S technology, mathematical methods applicable to any field of geography, territorial micro-scalar and laboratory experiments, and the latest developments induced by the measurement techniques to the geographical research. Geographia Technica is dedicated to all those who understand that nowadays every field of geography can only be described by specific numerical values, variables both oftime and space which require the sort of numerical analysis only possible with the aid of technical and quantitative methods offered by powerful computers and dedicated software. Our understanding of Geographia Technica expands the concept of technical methods applied to geography to its broadest sense and for that, papers of different interests such as: G.l.S, Spatial Analysis, Remote Sensing, Cartography or Geostatistics as well as papers which, by promoting the above mentioned directions bring a technical approach in the fields of hydrology, climatology, geomorphology, human geography territorial planning are more than welcomed provided they are of sufficient wide interest and relevance.