Naoki Takagi

A study on the classification of urban region using Hyper-spectrum data at AVIRIS

The purpose of this study is to improve accuracy of land cover classification in urban area. This study used Quick bird and airborne hyper spectrum sensor AVIRIS. Land cover survey was attempted at residential area. There were houses, road, pond, park and vegetations. There were many kinds of vegetations, broad leave trees as Ash, Elm, Willow, Maple, Cotton tree, Needle leave trees as Pine, Tsuga, Spruce. In the study in the past, about Quick Bird analysis, supervised classification (Maximum likelihood algorithm) was executed with some supervisors obtained from field study. 6categories were classified. The results show that with Quick Bird analysis, distribution of vegetation is comprehended well, but timber species are not comprehended well. About AVIRIS analysis, SAM (Spectral Angle Mapper classification) was executed with some supervisors obtained from field study. About broad leave trees, there were five species which spectrums were classified to categories. About grass, 3 categories were classified with conditions of land coverage condition. The accuracies of classification were 26% to 84%. It is confirmed that better results were obtained with AVIRIS. In this study, the classification of the material was tried. There were many kinds of roof materials at residential area, for example, Onix black, Shasta white, Desert tan, Siera gray, Terra cotta, Tile, Wood, Concrete, Asphalt. About AVIRIS analysis using measured spectrums, 7categories were classified. Target area was 2residential areas and Site of university. Target area size was 360 m by 360 m. The accuracies of classification were 44.4% to 100%.

Experimental Production of Heat-Island Map with Satellite and Airborne Thermal Infrared Data

The purpose of this study is experimental production of heat-island map with satellite and airborne thermal infrared data. In Japan, at almost of all cities, including not only major cities (i.e. Tokyo, Osaka, population is over one million) but also provincial cities (i.e. Sendai, Nagano, Kofu and so on, population is 100 thousands to 500 thousands), there are heat island phenomenon. Heat island map was made with satellite and airborne thermal infrared data observed day and night. The value of thermal data at daytime was expressed as red color and the value of thermal data at night time was expressed as blue and green color. The map shows heat island phenomenon and structure of city. Buildings with large heat capacity materials are shown with white or blue green color, houses with wood materials (comparatively low heat capacity materials) are shown with red color.

The relationship between land cover and micro-climates at weather observation points in Japan

This paper is based on research of effect of land cover change to city climate, using remote sensing data. Two periods data with fifteen years interval were analyzed. Land cover classification about 600m by 600m size was analyzed at 225 weather observation points. At 145 points of the 225 points, there was no change about land cover. At 22 points, land cover tended widely to urbanize. At non-changed points, the average inclination of temperature was 0.052 degrees Celsius per year, and at urbanized points, the average inclination of temperature was 0.067 degrees Celsius per year. The relation between temperature inclination and urbanized index UI and normalized vegetation index NDVI was also analyzed. There is correlation with temperature inclination and UI and NDVI.

THE RELATION BETWEEN SITUATION OF LAND COVER 300M AROUND AND MICROCLIMATE AT WEATHER OBSERVATION POINT IN VARIOUS PARTS IN JAPAN

This report is based on the research of the influence of land cover change on the city climate using remote sensing data. Data from two periods with a fifteen year interval was analyzed. The land cover classification of a plot of land 600m by 600m was analyzed at 225 weather stations. At 145 of the 225 points, there was no change in land cover. At the 80 points experiencing the greatest change, land cover tended to urbanize.As for the un-changed points, the average temperature inclination was 0.052 degrees Celsius per year, and at urbanized points, the average temperature inclination was 0.067 degrees Celsius per year. The relation between temperature inclination and urbanized index UI and normalized vegetation index NDVI was also analyzed. There is correlation with temperature inclination and UI and NDVI.

Detail Land Coverage Analysis in Urban Area with Quick Bird and AVIRIS Data

The purpose of this study is to improve accuracy of land cover classification in urban area. This study used Quick bird and airborne hyper spectrum sensor AVIRIS. Land cover survey was attempted at residential area. There were houses, road, pond, park and vegetations. There were many kinds of vegetations, broad leave trees as Ash, Elm, Willow, Maple, Cotton tree, Needle leave trees as Pine, Tsuga, Spruce. About Quick Bird analysis, supervised classification (Maximum likelihood algorithm) was executed with some supervisors obtained from field study. 6categories were classified. The results show that with Quick Bird analysis, distribution of vegetation is comprehended well, but timber species are not comprehended well. About AVIRIS analysis, SAM (Spectral Angle Mapper classification) was executed with some supervisors obtained from field study. About broad leave trees, there were five species which spectrums were classified to categories. About grass, 3 categories were classified with conditions of land coverage condition. The accuracies of classification were 26% to 84%. It is confirmed that better results were obtained with AVIRIS.

Study on the correlation between the old city and the newly developed city regarding audible sound types and sound levels

Sound‐level data are the most important among the appraisal data of environmental noise. However, to appraise diversified environment like that of the present times, a more detailed appraisal on environmental noise could be obtained by conducting subjective appraisal in addition to the physical noise level. In this research, we have surveyed subjective appraisal, audible sound types and sound level (LAeq) along boulevard, commercial, and residential areas in the old city and the newly developed city. The subjective appraisal by examinees shows that of the 100% of noise along boulevards, traffic sound occupies 80%; of the 60% of noise in commercial areas the traffic sound occupies 65%; and of the 40% of noise in residential areas the traffic sound occupies 50%. We have studied the correlation between the result of the same surveyed in the old city and the newly developed city. There have been fewer study cases about the correlation between sound types and subjective appraisal; therefore, in this paper we h...

Study on the correlation between field experiments and laboratory experiments for audible environmental noise

Our objective in this study is to clarify, by some experiments, that there would be a different response and that subjective appraisal differs when audible sound types change even under the same sound level. So far various methods that we, appraise sound environment by our subjectivity, have been proposed and utilized. But we have seen a few study cases about the correlation between sound types, subjective appraisal, and, moreover, sound level. In this research, we have surveyed environmental noise in terms of data obtained by physical quantity (LAeq), and subjective appraisal and audible noise types, then examined the correlation between them. Consequently we could confirm their audible sound types might influence noise level and subjective appraisal. Moreover, as a result of the surveillance of noise environment along boulevards, commercial, and residential areas, the sound heard in each area constitutes the same ratios. The data obtained by subjective appraisal on each area is almost the same. This fac...

Secular change of land use and ground temperature in provincial city

In provincial cities, the development of urbanization changed land use in whole city. It was major reason of heat island phenomenon. This paper analyze 15 years secular change of land use and ground temperature in provincial city (Nagano city). The results shows that land coverage have strong correlation with ground temperature. The increase of artificial structure led ground temperature to increase.

A study of the accuracy of land coverage classification with remote-sensing data

Abstract This paper describes the accuracy of land coverage classification which makes use of remote-sensing data in a provincial city in Japan. The analysed area is Matsumoto city, an attractive commercial city with a population of about 200 000. Seven categories were prepared. LANDSAT-5 TM data were used. Data from three seasons were analysed on July 24, 1985, August 26, 1985, and October 26, 1984. The results show that the accuracy of land coverage classification varies with categories, seasons and analysing method. The average value of the accuracy is about 70%. To get good agreement requires a combination of bands, analysing method, seasons and multi-temporal data.