Abstract—The study of tourist activities and the mapping of their routes in space and time has be... more Abstract—The study of tourist activities and the mapping of their routes in space and time has become an important issue in tourism management. Here we represent space-time paths for the tourism industry by visualizing individual tourist activities and the paths followed using a 3D Geographic Information System (GIS). Considerable attention has been devoted to the measurement of accessibility to shopping, eating, walking and other services at the tourist destination. I turns out that GIS is a useful tool for studying the spatial behaviors of tourists in the area. The value of GIS is especially advantageous for space-time potential path area measures, especially for the accurate visualization of possible paths through existing city road networks. This study seeks to apply space-time concepts with a detailed street network map obtained from Google Maps to measure tourist paths both spatially and temporally. These paths are further determined based on data obtained from map questionnai...
2019 Twelfth International Conference on Ubi-Media Computing (Ubi-Media), 2019
In recent years, many internationally renowned sightseeing spots and museums have actively develo... more In recent years, many internationally renowned sightseeing spots and museums have actively developed mobile navigation systems to enhance the navigation effect, but there is still lack of system designed for geopark. Since most of the geology parks have rich geological landscape and topography, the common multimedia navigation system is difficult to present the detailed 3D scenery and appearance, and the navigation effect is limited. Therefore, we take the internationally renowned Yehliu Geopark in Taiwan as an example to develop a virtual reality mobile navigation system that supports multiple 3D display functions. The system can provide various navigation functions such as 3D automatic navigation, free navigation, panoramic image, stereoscopic image, etc., and is supplemented by functions such as tour recommendation and geological knowledge quiz, which can effectively enhance the navigation effect, guide users to learn related geological knowledge, and further enrich the user'...
World Academy of Science, Engineering and Technology, International Journal of Social, Behavioral, Educational, Economic, Business and Industrial Engineering, 2010
The Taiwan government has invested approximately 21 billion NT dollars in the construction of bic... more The Taiwan government has invested approximately 21 billion NT dollars in the construction of bicycle paths since bicycling has gained huge popularity as a healthy leisure and recreational activity. This study focuses on the behavior of recreational bicyclists in Danshuei and Bali, northern Taiwan. Data were collected from a field investigation carried out along the Danshuei bicycle path and Bali left-bank bicycle path. A total of 578 questionnaires were gathered for data analysis. Descriptive statistics and Chi-Square tests were used to assess bicyclists’ behaviors. The frequency shows that, in these areas, Danshuei and Bali, most bicyclists rented bicycles, rode the bicycle path in the afternoon for about 2 hours. The used the bicycle path one time per week. For most, it was the first time to ride these bicycle paths. There were significant differences in distribution of bicycle ownership, time of day, duration of ride, ride frequency, and whether riding occurred on weekdays or we...
Baseball is unique among other sports in Taiwan. Baseball has become a “symbol of the Taiwanese s... more Baseball is unique among other sports in Taiwan. Baseball has become a “symbol of the Taiwanese spirit and Taiwan’s national sport”. Taiwan’s first professional sports league, the Chinese Professional Baseball League (CPBL), was established in 1989. Starters pitch many more innings over the course of a season and for a century teams have made all their best pitchers starters. In this study, we attempt to determine the on-field performance these pitchers and which won the most CPBL games in 2009. We utilize the discriminate analysis approach to solve the problem, examining winning pitchers and their statistics, to reliably find the best starting pitcher. The data employed in this paper include innings pitched (IP), earned runs allowed (ERA) and walks plus hits per inning pitched (WPHIP) provided by the official website of the CPBL. The results show that Aaron Rakers was the best starting pitcher of the CPBL. The top 10 CPBL starting pitchers won 14 games to 8 games in the 2009 season...
The normalized difference vegetation index (NDVI) and normalized difference moisture index (NDMI)... more The normalized difference vegetation index (NDVI) and normalized difference moisture index (NDMI) derived from the moderate resolution imaging spectroradiometer (MODIS) have been widely used to identify spatial information of drought condition. The relationship between NDVI and NDMI has been analyzed using Pearson correlation analysis and showed strong positive relationship. The drought indices have detected drought conditions and identified spatial extents of drought. A comparison between normal year and drought year demonstrates that the amplitude analysis considered both vegetation and moisture condition is an effective method to identify drought condition. We proposed the amplitude analysis is useful for quick spatial assessment of drought information at a regional scale. Keywords—NDVI, NDMI, Drought, remote sensing, spatial assessment.
In this study, we used the time series images of spectral reflectance from TERRA satellite to com... more In this study, we used the time series images of spectral reflectance from TERRA satellite to compute normalized difference vegetation index (NDVI) and normalized difference moisture index (NDMI) in the Chaoyang City, western Liaoning, north-eastern China. Time-series data of NDVI and NDMI derived from satellite images of the Moderate Resolution Imaging Spectroradiometer (MODIS) were used to show the growing curve of corn field and the impact of precipitation. The study assessed the spatial impact of drought on the time-series data of NDVI and NDMI in western Liaoning, north-eastern China. In addition, the standard precipitation index was used to detect metrological drought events. The results help us to compare the drought events detected from precipitation and satellite-derived images. Thus, quick spatial drought assessment techniques can be improved to effectively detect drought events spatially and temporally. Key-Words: Drought assessment, Standard precipitation index, Remote s...
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
Page 1. THE IMPACT OF TERRAIN ON NDVI DYNAMICS OF CORN FIELD USING GENERALIZED ESTIMATING EQUATIO... more Page 1. THE IMPACT OF TERRAIN ON NDVI DYNAMICS OF CORN FIELD USING GENERALIZED ESTIMATING EQUATIONS AND TIME-SERIES MODIS IMAGES Meng-Lung Lina and Cheng-Hwang Perngb a Department ...
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
ABSTRACT Waste dumping is one of the main pollution causing land deterioration and resource deple... more ABSTRACT Waste dumping is one of the main pollution causing land deterioration and resource depletion. To help manage the environmental protection resource, this study proposed the risk assessment integrating remote sensing and geographic information system (GIS) to predict and map potential waste dumping area. Factors relative to waste dumping were generated with spatial analysis, which quantifies the spatial correlation between waste dumping areas and other land use. The suspected waste dumping mapping with FORMOSAT2 imagery and hybrid classification was used as the other factor. All factors were then combined with certainty factor (CF) model to generate waste dumping risk map. Validating the result with the 45 waste dumping cases, CF model predicts 75.56% of the waste dumping cases in the very high potential area. The result demonstrated that integrating remote sensing, spatial analysis and CF model for waste dumping risk assessment could be reliable. Future applications include helping inspectors to concentrate the patrol areas, which could save manpower significantly.
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
ABSTRACT This paper proposed to apply spatial computing methods to identify drought affected area... more ABSTRACT This paper proposed to apply spatial computing methods to identify drought affected areas using satellite images. Satellite derived indices, such as Normalized difference vegetation index (NDVI), normalized difference moisture index (NDMI), standardized vegetation index (SVI) and standardized moisture index (SMI), were used to evaluate drought condition. The maps of SVI and SMI showed the areas affected by the drought. The results demonstrated the proposed method is effective and provide useful spatial information.
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
Cloud cover severely influences the accuracy of land use/cover mapping and biomass estimation wit... more Cloud cover severely influences the accuracy of land use/cover mapping and biomass estimation with optical satellite imagery. This study integrated automated threshold selection algorithm (ATSA) and region growing to delineate unrecoverable thick cloud. Concerning hazy areas, Fourier analysis was used to generate haze filter to reduce haze interference and recover ground information. The result of thick cloud delineation shows the overall accuracy and kappa statistics are 94.75% and 0.883 separately. For the haze-off result, haze filter improves land cover classification and increases the overall accuracy and kappa statistics by about 4%. With NDVI results, the root-mean-square (RMS) between hazy and clear image is 0.21 while RMS between haze-off and clear image is 0.15. This study demonstrated that cloud processing only using Green, Red, NIR bands without cloud-free reference areas or imagery is sufficient for thick cloud delineation and can achieve some improvement in haze removal.
Fuzzy theory provides a rigorous, flexible approach to the problem of defining and computing. The... more Fuzzy theory provides a rigorous, flexible approach to the problem of defining and computing. Therefore, to facilitate decision-making in geographic information system (GIS), the graph layer indicator and the Takagi Sugeno (TS) fuzzy model have to be integrated. This study explains several versions of the TS fuzzy model based on fuzzy theory and fuzzy operation. An inference model is constructed for GIS by the TS fuzzy model to formulate an integrated TS decision making system (TSDMK). The TSDMK can deal with inexact, linguistic, vague and uncertain data of GIS. The operator assigns most graph layer indicators by intuition. This investigation assesses applications of fuzzy logic for decision-making in GIS based on TSDMK graphs focusing on model-based systems. Keywords—Geographic information system, tourism industry, fuzzy model, decision-making.
2009 IEEE International Geoscience and Remote Sensing Symposium, 2009
ABSTRACT The objective of this study was to identify the spatial extent of high drought risk area... more ABSTRACT The objective of this study was to identify the spatial extent of high drought risk areas using remotely sensed drought indices in arid environments. Using remote sensing and geographic information system techniques, this study spatially quantified drought risk using hydrological drought indices derived from satellite data in Ejin Oasis, western China. All indices were computed from the MODIS data in the summer for year 2003. Another group is based on soil moisture, including the Normalized Difference Moisture Index (NDMI), and Standardized Moisture Index (SMI). The use of local Getis statistic (Gi*) provides insights on the spatial relationships of land cover pattern to drought risk assessment. Specially, locations of significant Gi* values identified areas where the differences in hydrological drought indices occur and are spatially clustered. This information may then be used to map high drought risk areas and help governments to improve the allocation of local water resources in arid environments.
Agriculture and Hydrology Applications of Remote Sensing, 2006
The desertification in Northwestern China and Mongolia shows the result of conflicts between econ... more The desertification in Northwestern China and Mongolia shows the result of conflicts between economic development and natural conservation. Many researches have proven the desert areas are growing in these regions. The variations of bi-weekly NDVI satellite images are used as one of the parameters to evaluate the vegetation dynamics over large scale studies. In this study, remotely sensed satellite images
Ying yong sheng tai xue bao = The journal of applied ecology / Zhongguo sheng tai xue xue hui, Zhongguo ke xue yuan Shenyang ying yong sheng tai yan jiu suo zhu ban, 2008
In this paper, the Lizejian wetland landscape patterns in northeastern Taiwan of China were estab... more In this paper, the Lizejian wetland landscape patterns in northeastern Taiwan of China were established by landscape indices and aerial photo interpretation, and a parallel analysis was made on them. The results showed that landscape indices could only indicate the landscape geometric characteristics of the wetland at patch and landscape levels, but could not present its spatial and functional characteristics observed from aerial photos. Combining aerial photo interpretation with landscape indices could be helpful to the holistic understanding of Lizejian wetland' s landscape structure and function, and improve the landscape pattern analysis. The new method for assessing landscape structure from a holistic point of view would play an important role in future landscape ecology research.
Agriculture and Hydrology Applications of Remote Sensing, 2006
Land degradation has become an important issue in western China recently. Oasis ecosystem is sens... more Land degradation has become an important issue in western China recently. Oasis ecosystem is sensitive to environmental disturbances, such as abnormal /extreme events of precipitations, water supply from upper watersheds, fluctuations of temperatures, etc. Satellite remote sensing of terrestrial ecosystems provides temporal dynamics and spatial distributions of landscape green covers over large areas. Seasonal green cover data are normally important
Abstract—The study of tourist activities and the mapping of their routes in space and time has be... more Abstract—The study of tourist activities and the mapping of their routes in space and time has become an important issue in tourism management. Here we represent space-time paths for the tourism industry by visualizing individual tourist activities and the paths followed using a 3D Geographic Information System (GIS). Considerable attention has been devoted to the measurement of accessibility to shopping, eating, walking and other services at the tourist destination. I turns out that GIS is a useful tool for studying the spatial behaviors of tourists in the area. The value of GIS is especially advantageous for space-time potential path area measures, especially for the accurate visualization of possible paths through existing city road networks. This study seeks to apply space-time concepts with a detailed street network map obtained from Google Maps to measure tourist paths both spatially and temporally. These paths are further determined based on data obtained from map questionnai...
2019 Twelfth International Conference on Ubi-Media Computing (Ubi-Media), 2019
In recent years, many internationally renowned sightseeing spots and museums have actively develo... more In recent years, many internationally renowned sightseeing spots and museums have actively developed mobile navigation systems to enhance the navigation effect, but there is still lack of system designed for geopark. Since most of the geology parks have rich geological landscape and topography, the common multimedia navigation system is difficult to present the detailed 3D scenery and appearance, and the navigation effect is limited. Therefore, we take the internationally renowned Yehliu Geopark in Taiwan as an example to develop a virtual reality mobile navigation system that supports multiple 3D display functions. The system can provide various navigation functions such as 3D automatic navigation, free navigation, panoramic image, stereoscopic image, etc., and is supplemented by functions such as tour recommendation and geological knowledge quiz, which can effectively enhance the navigation effect, guide users to learn related geological knowledge, and further enrich the user'...
World Academy of Science, Engineering and Technology, International Journal of Social, Behavioral, Educational, Economic, Business and Industrial Engineering, 2010
The Taiwan government has invested approximately 21 billion NT dollars in the construction of bic... more The Taiwan government has invested approximately 21 billion NT dollars in the construction of bicycle paths since bicycling has gained huge popularity as a healthy leisure and recreational activity. This study focuses on the behavior of recreational bicyclists in Danshuei and Bali, northern Taiwan. Data were collected from a field investigation carried out along the Danshuei bicycle path and Bali left-bank bicycle path. A total of 578 questionnaires were gathered for data analysis. Descriptive statistics and Chi-Square tests were used to assess bicyclists’ behaviors. The frequency shows that, in these areas, Danshuei and Bali, most bicyclists rented bicycles, rode the bicycle path in the afternoon for about 2 hours. The used the bicycle path one time per week. For most, it was the first time to ride these bicycle paths. There were significant differences in distribution of bicycle ownership, time of day, duration of ride, ride frequency, and whether riding occurred on weekdays or we...
Baseball is unique among other sports in Taiwan. Baseball has become a “symbol of the Taiwanese s... more Baseball is unique among other sports in Taiwan. Baseball has become a “symbol of the Taiwanese spirit and Taiwan’s national sport”. Taiwan’s first professional sports league, the Chinese Professional Baseball League (CPBL), was established in 1989. Starters pitch many more innings over the course of a season and for a century teams have made all their best pitchers starters. In this study, we attempt to determine the on-field performance these pitchers and which won the most CPBL games in 2009. We utilize the discriminate analysis approach to solve the problem, examining winning pitchers and their statistics, to reliably find the best starting pitcher. The data employed in this paper include innings pitched (IP), earned runs allowed (ERA) and walks plus hits per inning pitched (WPHIP) provided by the official website of the CPBL. The results show that Aaron Rakers was the best starting pitcher of the CPBL. The top 10 CPBL starting pitchers won 14 games to 8 games in the 2009 season...
The normalized difference vegetation index (NDVI) and normalized difference moisture index (NDMI)... more The normalized difference vegetation index (NDVI) and normalized difference moisture index (NDMI) derived from the moderate resolution imaging spectroradiometer (MODIS) have been widely used to identify spatial information of drought condition. The relationship between NDVI and NDMI has been analyzed using Pearson correlation analysis and showed strong positive relationship. The drought indices have detected drought conditions and identified spatial extents of drought. A comparison between normal year and drought year demonstrates that the amplitude analysis considered both vegetation and moisture condition is an effective method to identify drought condition. We proposed the amplitude analysis is useful for quick spatial assessment of drought information at a regional scale. Keywords—NDVI, NDMI, Drought, remote sensing, spatial assessment.
In this study, we used the time series images of spectral reflectance from TERRA satellite to com... more In this study, we used the time series images of spectral reflectance from TERRA satellite to compute normalized difference vegetation index (NDVI) and normalized difference moisture index (NDMI) in the Chaoyang City, western Liaoning, north-eastern China. Time-series data of NDVI and NDMI derived from satellite images of the Moderate Resolution Imaging Spectroradiometer (MODIS) were used to show the growing curve of corn field and the impact of precipitation. The study assessed the spatial impact of drought on the time-series data of NDVI and NDMI in western Liaoning, north-eastern China. In addition, the standard precipitation index was used to detect metrological drought events. The results help us to compare the drought events detected from precipitation and satellite-derived images. Thus, quick spatial drought assessment techniques can be improved to effectively detect drought events spatially and temporally. Key-Words: Drought assessment, Standard precipitation index, Remote s...
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
Page 1. THE IMPACT OF TERRAIN ON NDVI DYNAMICS OF CORN FIELD USING GENERALIZED ESTIMATING EQUATIO... more Page 1. THE IMPACT OF TERRAIN ON NDVI DYNAMICS OF CORN FIELD USING GENERALIZED ESTIMATING EQUATIONS AND TIME-SERIES MODIS IMAGES Meng-Lung Lina and Cheng-Hwang Perngb a Department ...
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
ABSTRACT Waste dumping is one of the main pollution causing land deterioration and resource deple... more ABSTRACT Waste dumping is one of the main pollution causing land deterioration and resource depletion. To help manage the environmental protection resource, this study proposed the risk assessment integrating remote sensing and geographic information system (GIS) to predict and map potential waste dumping area. Factors relative to waste dumping were generated with spatial analysis, which quantifies the spatial correlation between waste dumping areas and other land use. The suspected waste dumping mapping with FORMOSAT2 imagery and hybrid classification was used as the other factor. All factors were then combined with certainty factor (CF) model to generate waste dumping risk map. Validating the result with the 45 waste dumping cases, CF model predicts 75.56% of the waste dumping cases in the very high potential area. The result demonstrated that integrating remote sensing, spatial analysis and CF model for waste dumping risk assessment could be reliable. Future applications include helping inspectors to concentrate the patrol areas, which could save manpower significantly.
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
ABSTRACT This paper proposed to apply spatial computing methods to identify drought affected area... more ABSTRACT This paper proposed to apply spatial computing methods to identify drought affected areas using satellite images. Satellite derived indices, such as Normalized difference vegetation index (NDVI), normalized difference moisture index (NDMI), standardized vegetation index (SVI) and standardized moisture index (SMI), were used to evaluate drought condition. The maps of SVI and SMI showed the areas affected by the drought. The results demonstrated the proposed method is effective and provide useful spatial information.
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
Cloud cover severely influences the accuracy of land use/cover mapping and biomass estimation wit... more Cloud cover severely influences the accuracy of land use/cover mapping and biomass estimation with optical satellite imagery. This study integrated automated threshold selection algorithm (ATSA) and region growing to delineate unrecoverable thick cloud. Concerning hazy areas, Fourier analysis was used to generate haze filter to reduce haze interference and recover ground information. The result of thick cloud delineation shows the overall accuracy and kappa statistics are 94.75% and 0.883 separately. For the haze-off result, haze filter improves land cover classification and increases the overall accuracy and kappa statistics by about 4%. With NDVI results, the root-mean-square (RMS) between hazy and clear image is 0.21 while RMS between haze-off and clear image is 0.15. This study demonstrated that cloud processing only using Green, Red, NIR bands without cloud-free reference areas or imagery is sufficient for thick cloud delineation and can achieve some improvement in haze removal.
Fuzzy theory provides a rigorous, flexible approach to the problem of defining and computing. The... more Fuzzy theory provides a rigorous, flexible approach to the problem of defining and computing. Therefore, to facilitate decision-making in geographic information system (GIS), the graph layer indicator and the Takagi Sugeno (TS) fuzzy model have to be integrated. This study explains several versions of the TS fuzzy model based on fuzzy theory and fuzzy operation. An inference model is constructed for GIS by the TS fuzzy model to formulate an integrated TS decision making system (TSDMK). The TSDMK can deal with inexact, linguistic, vague and uncertain data of GIS. The operator assigns most graph layer indicators by intuition. This investigation assesses applications of fuzzy logic for decision-making in GIS based on TSDMK graphs focusing on model-based systems. Keywords—Geographic information system, tourism industry, fuzzy model, decision-making.
2009 IEEE International Geoscience and Remote Sensing Symposium, 2009
ABSTRACT The objective of this study was to identify the spatial extent of high drought risk area... more ABSTRACT The objective of this study was to identify the spatial extent of high drought risk areas using remotely sensed drought indices in arid environments. Using remote sensing and geographic information system techniques, this study spatially quantified drought risk using hydrological drought indices derived from satellite data in Ejin Oasis, western China. All indices were computed from the MODIS data in the summer for year 2003. Another group is based on soil moisture, including the Normalized Difference Moisture Index (NDMI), and Standardized Moisture Index (SMI). The use of local Getis statistic (Gi*) provides insights on the spatial relationships of land cover pattern to drought risk assessment. Specially, locations of significant Gi* values identified areas where the differences in hydrological drought indices occur and are spatially clustered. This information may then be used to map high drought risk areas and help governments to improve the allocation of local water resources in arid environments.
Agriculture and Hydrology Applications of Remote Sensing, 2006
The desertification in Northwestern China and Mongolia shows the result of conflicts between econ... more The desertification in Northwestern China and Mongolia shows the result of conflicts between economic development and natural conservation. Many researches have proven the desert areas are growing in these regions. The variations of bi-weekly NDVI satellite images are used as one of the parameters to evaluate the vegetation dynamics over large scale studies. In this study, remotely sensed satellite images
Ying yong sheng tai xue bao = The journal of applied ecology / Zhongguo sheng tai xue xue hui, Zhongguo ke xue yuan Shenyang ying yong sheng tai yan jiu suo zhu ban, 2008
In this paper, the Lizejian wetland landscape patterns in northeastern Taiwan of China were estab... more In this paper, the Lizejian wetland landscape patterns in northeastern Taiwan of China were established by landscape indices and aerial photo interpretation, and a parallel analysis was made on them. The results showed that landscape indices could only indicate the landscape geometric characteristics of the wetland at patch and landscape levels, but could not present its spatial and functional characteristics observed from aerial photos. Combining aerial photo interpretation with landscape indices could be helpful to the holistic understanding of Lizejian wetland' s landscape structure and function, and improve the landscape pattern analysis. The new method for assessing landscape structure from a holistic point of view would play an important role in future landscape ecology research.
Agriculture and Hydrology Applications of Remote Sensing, 2006
Land degradation has become an important issue in western China recently. Oasis ecosystem is sens... more Land degradation has become an important issue in western China recently. Oasis ecosystem is sensitive to environmental disturbances, such as abnormal /extreme events of precipitations, water supply from upper watersheds, fluctuations of temperatures, etc. Satellite remote sensing of terrestrial ecosystems provides temporal dynamics and spatial distributions of landscape green covers over large areas. Seasonal green cover data are normally important
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