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Urban building extraction is an important task of remotely sensed imagery analysis. Many automatic or semi-automatic algorithms have been proposed to address this problem using various remote sensing sources. Although very high spatial resolution remotely sensed imagery has been used in this field, the large number of mixed pixels that currently still exist in these images makes the extracted urban...
Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol products have been extensively used to address ecological environment and climate change issues in many countries and regions. However, the retrieval quality of the MODIS aerosol products in different regions is the international research hotpot. The paper presents aerosol optical depth (AOD) data retrieved from MODIS in Ningbo, Lin'an...
Presently, there are more than 50 cities in China which are confronting or will confront the problem of resources exhaustion. These cities with resources as mainstay industry are gradually falling into recession with a low economic growth. Their positioning for transformation is in urgent need of solutions. As new technology in surveying develops, it is necessary to take advantage of RS (Remote Sensing)...
Anisotropic diffusion has received a lot of attention and has experienced significant developments, with promising results and applications in several specific domains. In this paper, a general flexible class of hyperspectral forward-and-backward (FAB) diffusion process will be proposed, which can achieve the main requirements for edge-preserving regularization with image enhancement. In addition,...
The purpose of this research is to develop a practical system for building damage detection in dense urban areas after natural disasters such as earthquakes, typhoons, and tsunamis. A novel approach is presented that allows real-time building change detection using high resolution aerial images and existing 3D building data. The developed system contains two major processing modules: inflight processing...
With the continuing increase in the number of images collected every day from different sensors, automated registration of multisensor/multispectral images has become a very important issue. This is especially true when pre- and post-event image comparison is concerned: for this particular application, the requirement of obtaining the earliest possible post-event image imposes the use of data potentially...
High-resolution synthetic aperture radar (SAR) played an important role in the disaster management efforts after the Wenchuan Earthquake on May 12, 2008. SAR data was used for damage assessment, risk monitoring, and for the continuous monitoring of the so-called quake lakes. Landslides, triggered by the earthquake and the aftershocks, devastated large areas, killing thousands of people. Landslides...
It is well know that geometric filters for points cloud can only go so far when removing above-ground phenomena for it's difficult to determine whether a laser point has hit a special object when only spatial analysis is included. And comparing to the discrete points cloud, the high quality, large-coverage images provided by aerial cameras is a very important advantage of photogrammetry, which can...
Urban heat island is a phenomenon that the temperature of urban area is higher than surrounding rural area or suburban area, which is considered as one of major problems in the 21st century posed to human beings. With the extension of urban area, the phenomenon shows an increasing trend. So we must find the critical factor and analyze the relationship between them in order to resolve the problem of...
The problems on how to make full use of the existing network resources should be resolved as soon as possible. By achieving this goal, the geographic information can be shared on the Internet. Also, social management, social standards and the quality of life could be enhanced. Moreover, the management of social and people's lives will change in the remote manner. The main issue is to build a geographic...
Radioactive calibration and atmospheric correction are two important steps when encountering a new sensor and its remote sensing images. Wide field-of-view Hyperspectral Imager(WHI) is an airborne imaging spectrometer with a 5 nm spectral resolution, whose spectrum range is from 406 nm to 985 nm. For evaluating its applications in city water monitoring, a flight was carried out in Taihu in January...
High resolution satellite images offer abundance information of the earth surface for remote sensing applications. Using change detection technology to extract the target area changes from high resolution remote sensing images and rapidly update map database has become a focus research of remote sensing information processing. However the traditional methods of change detection are not suitable for...
Urban planning is the integration of the disciplines of land use planning, transport planning, environmental planning. Urban planning should satisfy the survival demands of humans and also it should be in harmony with the natural conditions. As the concept of sustainable development accepted by more and more people, urban renewal and re-generation of inner cities have become very important parts of...
Airborne three line sensors now play more and more important role in large scale mapping, earth resource exploration, cyber city and other GIS applications. It can provide three stereo models for photogrammetric reconstitution. During the image acquisition, the equipped GPS/IMU system records the position and attitude data simultaneously and provides airborne sensors the capability of direct geopositioning...
This Paper compared and analysed Urban Heat Island Effects in Chengdu plain's Mianyang, Deyang, and Meishan, making full use of channel 4 (10.3 ~ 11.3 um) data of NOAA/AVHRR. Research results showed that Urban Heat Island Effects of middle-sized cities in the inner land are very evident; the daily mean of the maximum strength of Urban Heat Island Effects in the three cities stands at 5.19degC with...
Urban heat island (UHI) phenomenon is one of the most serious environmental problems accompanied with the urban developments. The spatial distribution of UHI changed in different time such as season, month, day or hour. In roder to analyze the UHI phenomenon accurately, we should detemine the optimum time when the clearest and the biggest UHI intensity might occur. By selecting Shanghai city of China...
In this paper, QuickBird high resolution satellite image data, combined with the prior landuse maps, the landuse major planning map and other basic datum was adopted to extract landuse information of Nanchang Hi-Tech Industrial Development Area through the human-computer interaction approach, and the results were verified by plot in field to do meta-analysis. The results show that the multi-information...
Conventional ground-based air pollution observations are difficult to indicate the spatial distribution of pollutant and its changes. To overcome the difficulty, this paper proposes a method which is used to monitor the distribution of urban air pollution by using remote sensing technology. The method uses surface reflectance image to extract the weak atmospheric information from MODIS data, and then...
Debris flows threaten human life security and property in its destroyed and buried way, especially dangerous to cities, which destroyed most seriously to the main structure-houses in the cities. This paper takes Dongchuan, a district of Kunming, Yunnan province as an example to explore the solution of estimating housing loss caused by urban debris flow disaster. Firstly, using spot-5 data to extract...
This paper presents an target detection algorithm focusing on making full use of both spatial and spectral features of the high spatial resolution hyperspectral (HSRH) imagery. It use the spatial relationship between pixels in the finite impulse filter with the low dimension data transferred from the original imagery. Experiments show it performs better than the method solely depending on spectral...
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