Pub Date : 2009-06-11DOI: 10.1109/RAST.2009.5158208
I. Ivánová, R. Nedkov, T. Michev, N. Kamburova
In this paper we describe the dynamics of the floating islands in Sreburna Lake using remote sensing methods and aerospace information in the period 1979–2005. These floating islands represent specific habitats of flying reed in places with greater water depths currently is found only in Sreburna Lake in Bulgaria and in the Danube Delta in Romania. These floating islands are characterized by an active movement during the years, which is caused mainly by the annual fluctuations of the lake's water level. Significant movement is observed at a high water level and high winds, which influence the island's flora and fauna. The purpose of this paper is to analyse this dynamics, which will be helpful for making an adequate decision for a better management of the reserve and preservation of these floating islands with minimum impact on the native flora and fauna.
{"title":"Estimation of the dynamics of floating islands in the territory of Sreburna Lake, situated in the territory of Bulgaria, using aerospace and GPS data in the period 1979 – 2005","authors":"I. Ivánová, R. Nedkov, T. Michev, N. Kamburova","doi":"10.1109/RAST.2009.5158208","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158208","url":null,"abstract":"In this paper we describe the dynamics of the floating islands in Sreburna Lake using remote sensing methods and aerospace information in the period 1979–2005. These floating islands represent specific habitats of flying reed in places with greater water depths currently is found only in Sreburna Lake in Bulgaria and in the Danube Delta in Romania. These floating islands are characterized by an active movement during the years, which is caused mainly by the annual fluctuations of the lake's water level. Significant movement is observed at a high water level and high winds, which influence the island's flora and fauna. The purpose of this paper is to analyse this dynamics, which will be helpful for making an adequate decision for a better management of the reserve and preservation of these floating islands with minimum impact on the native flora and fauna.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"18 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131434034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-11DOI: 10.1109/RAST.2009.5158215
Z. Xin, Niu Shuwen, L. Yonghua, Liu Jianlan, Li Yixin
Dividing the Main Functional Regions on territory space is implemented in China, in order to identify the region units that are suitable to develop or protect. It is essential to coordinate the relationship between human and nature, so as to achieve the target of sustainable development. Gansu Province, which is located in the northwest of China, has large span in the geographic range. In this area, geographical elements formed complicated and various combinations on the space, additionally the contradiction between economic development and ecological protection appeared outstanding. We selected nine aggregate indices that could reflect the carrying capacity of resource and environment, development density and development potential of a region to evaluate 83 county-lever districts. Using geographic information system and spatial analysis method, we revealed the spatial autocorrelation and heterogeneity of all the evaluation units, then divided Main Functional Regions and represented in graph. The results indicate that regional differentiation characteristics are obvious in Gansu, and the whole territory land can be divided into four functional regions including the development type, the type inclined to development, the type inclined to protection and the protective type. Then we study the spatial pattern of functional region. Based on these work above, it can provide scientific basis for adjusting regional policy and implementing the sustainable development strategy.
{"title":"Major function oriented zoning at provincial level based on spatial analysis: A case study of Gansu Province, China","authors":"Z. Xin, Niu Shuwen, L. Yonghua, Liu Jianlan, Li Yixin","doi":"10.1109/RAST.2009.5158215","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158215","url":null,"abstract":"Dividing the Main Functional Regions on territory space is implemented in China, in order to identify the region units that are suitable to develop or protect. It is essential to coordinate the relationship between human and nature, so as to achieve the target of sustainable development. Gansu Province, which is located in the northwest of China, has large span in the geographic range. In this area, geographical elements formed complicated and various combinations on the space, additionally the contradiction between economic development and ecological protection appeared outstanding. We selected nine aggregate indices that could reflect the carrying capacity of resource and environment, development density and development potential of a region to evaluate 83 county-lever districts. Using geographic information system and spatial analysis method, we revealed the spatial autocorrelation and heterogeneity of all the evaluation units, then divided Main Functional Regions and represented in graph. The results indicate that regional differentiation characteristics are obvious in Gansu, and the whole territory land can be divided into four functional regions including the development type, the type inclined to development, the type inclined to protection and the protective type. Then we study the spatial pattern of functional region. Based on these work above, it can provide scientific basis for adjusting regional policy and implementing the sustainable development strategy.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115343656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-11DOI: 10.1109/RAST.2009.5158188
M. Spiridonakos, S. Fassois
The problem of multi-channel output-only identification of the time-varying dynamics of an extendable prismatic arm structure under random excitation is considered. The identification is based on three simultaneously measured non-stationary vibration response signals obtained during a single experiment in which the arm extends from its fully retracted to its fully extended position. Non-stationary Functional Series Vector Time-dependent AutoRegressive (FS-VTAR) and AutoRegressive Moving Average (FS-VTARMA) methods are used, while critical comparisons with corresponding Pseudo-Linear Regression (PLR-VTAR and PLR-VTARMA) methods employing recursive models are also made. The superiority of the Functional Series methods, and particularly of the FS-VTARMA method, in capturing the time-varying dynamics is demonstrated.
{"title":"Multi-channel output-only identification of an extendable arm structure under random excitation: A comparison of parametric methods","authors":"M. Spiridonakos, S. Fassois","doi":"10.1109/RAST.2009.5158188","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158188","url":null,"abstract":"The problem of multi-channel output-only identification of the time-varying dynamics of an extendable prismatic arm structure under random excitation is considered. The identification is based on three simultaneously measured non-stationary vibration response signals obtained during a single experiment in which the arm extends from its fully retracted to its fully extended position. Non-stationary Functional Series Vector Time-dependent AutoRegressive (FS-VTAR) and AutoRegressive Moving Average (FS-VTARMA) methods are used, while critical comparisons with corresponding Pseudo-Linear Regression (PLR-VTAR and PLR-VTARMA) methods employing recursive models are also made. The superiority of the Functional Series methods, and particularly of the FS-VTARMA method, in capturing the time-varying dynamics is demonstrated.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121332450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-11DOI: 10.1109/RAST.2009.5158244
Elena Woo Lai Leng, M. Ismail, M. Subari
As one of the developing countries, Malaysia has started its space program since 1996 with the launch MEASAT-1 and MEASAT-2 communication satellites, and is now operated by a private company called Measat Satellite Systems Sdn. Bhd, formerly known as Binariang Sdn. Bhd. The launch of MEASAT-1 and MEASAT-2 led to a rapid increase in Malaysian infrastructure development, both in telecommunication and broadcasting industries, including the launch of the world's first digital Direct-To-Home(DTH) Multi-Channel TV Service, ASTRO. In year 2000, Malaysia launched its first national remote sensing satellite named TiungSAT-1 and four years later, Malaysia completed its second national remote sensing satellite RazakSAT™. After the development success of two national satellites, Malaysia is ready to take a step further by setting up and to successfully operate an “Assembly, Integration and Test (AIT) Centre” which will be used for most of the assembly and integration works for a satellite as well as the launch and environmental testing for a satellite. When a satellite is launched, it suffers a huge environmental impact both while on earth and in space. The vibro-acoustic and electromagnetic effect during launch and thermal effect in space may damage the satellite before it even begins its lifetime. Each satellite's qualification and acceptance tests differ from another due to the unique satellite's design characteristic such as the satellite's position, movement, local time, etc. Besides that, the orbit, altitude and launcher selection also plays an important role the determining the satellite test setup and test parameters. This centre will be the next stepping stone for the development of space program in Malaysia; therefore it is critical that the planning of AIT facility is in line with the objectives of the country's space program. This paper explains the overall setting up the Malaysia AIT facility including the test equipments that are needed to conduct environmental tests on the satellites and conclude by explaining the current progress of establishing the Malaysia AIT facility as well as future plans to be taken to establish this facility as one of the top testing facility.
{"title":"Setting-up the Assembly, Integration and Test Centre in Malaysia","authors":"Elena Woo Lai Leng, M. Ismail, M. Subari","doi":"10.1109/RAST.2009.5158244","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158244","url":null,"abstract":"As one of the developing countries, Malaysia has started its space program since 1996 with the launch MEASAT-1 and MEASAT-2 communication satellites, and is now operated by a private company called Measat Satellite Systems Sdn. Bhd, formerly known as Binariang Sdn. Bhd. The launch of MEASAT-1 and MEASAT-2 led to a rapid increase in Malaysian infrastructure development, both in telecommunication and broadcasting industries, including the launch of the world's first digital Direct-To-Home(DTH) Multi-Channel TV Service, ASTRO. In year 2000, Malaysia launched its first national remote sensing satellite named TiungSAT-1 and four years later, Malaysia completed its second national remote sensing satellite RazakSAT™. After the development success of two national satellites, Malaysia is ready to take a step further by setting up and to successfully operate an “Assembly, Integration and Test (AIT) Centre” which will be used for most of the assembly and integration works for a satellite as well as the launch and environmental testing for a satellite. When a satellite is launched, it suffers a huge environmental impact both while on earth and in space. The vibro-acoustic and electromagnetic effect during launch and thermal effect in space may damage the satellite before it even begins its lifetime. Each satellite's qualification and acceptance tests differ from another due to the unique satellite's design characteristic such as the satellite's position, movement, local time, etc. Besides that, the orbit, altitude and launcher selection also plays an important role the determining the satellite test setup and test parameters. This centre will be the next stepping stone for the development of space program in Malaysia; therefore it is critical that the planning of AIT facility is in line with the objectives of the country's space program. This paper explains the overall setting up the Malaysia AIT facility including the test equipments that are needed to conduct environmental tests on the satellites and conclude by explaining the current progress of establishing the Malaysia AIT facility as well as future plans to be taken to establish this facility as one of the top testing facility.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120963567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-11DOI: 10.1109/RAST.2009.5158210
M. Gure, M. Ozel, H. Yildirim, M. Ozdemir
In Mediterranean climate regions, forest fires are quite common in summer months due to increases in air temperature. Reforestation of fire areas are a constitutional obligation in Turkey. Identification as well as the follow-up rehabilitation efforts can be carried out by remote sensing techniques in economic and practical ways. In the present study, the images from LANDSAT and ASTER satellites were used in the determination of areal extentions and levels of damages due to recent forest fires in October 2008 in Çanakkale Province of Turkey. Our findings are compared with the official forest fire records by Çanakkale Forest Administration Office. Potential use of satellite images and related image processing and GIS techniques in the past and present forest fire identification and rehabilitation efforts are discussed and their possible use in the application of recent forest law amendments (known as 2B) are evaluated.
{"title":"Use of satellite images for forest fires in area determination and monitoring","authors":"M. Gure, M. Ozel, H. Yildirim, M. Ozdemir","doi":"10.1109/RAST.2009.5158210","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158210","url":null,"abstract":"In Mediterranean climate regions, forest fires are quite common in summer months due to increases in air temperature. Reforestation of fire areas are a constitutional obligation in Turkey. Identification as well as the follow-up rehabilitation efforts can be carried out by remote sensing techniques in economic and practical ways. In the present study, the images from LANDSAT and ASTER satellites were used in the determination of areal extentions and levels of damages due to recent forest fires in October 2008 in Çanakkale Province of Turkey. Our findings are compared with the official forest fire records by Çanakkale Forest Administration Office. Potential use of satellite images and related image processing and GIS techniques in the past and present forest fire identification and rehabilitation efforts are discussed and their possible use in the application of recent forest law amendments (known as 2B) are evaluated.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124786010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-11DOI: 10.1109/RAST.2009.5158217
Numan Unaldi, S. Temel, V. Asari, Z. Rahman
Recently we proposed a wavelet-based dynamic range compression algorithm to improve the visual quality of digital images captured in the high dynamic range scenes with non-uniform lighting conditions. The fast image enhancement algorithm which provides dynamic range compression preserving the local contrast and tonal rendition is a very good candidate in aerial imagery applications such as image interpretation for defense and security tasks. This algorithm can further be applied to video streaming for aviation safety. In this paper the latest version of the proposed algorithm which is able to enhance aerial images so that the enhanced images are better then direct human observation, is presented. The results obtained by applying the algorithm to numerous aerial images show strong robustness and high image quality.
{"title":"An automatic wavelet-based nonlinear image enhancement technique for aerial imagery","authors":"Numan Unaldi, S. Temel, V. Asari, Z. Rahman","doi":"10.1109/RAST.2009.5158217","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158217","url":null,"abstract":"Recently we proposed a wavelet-based dynamic range compression algorithm to improve the visual quality of digital images captured in the high dynamic range scenes with non-uniform lighting conditions. The fast image enhancement algorithm which provides dynamic range compression preserving the local contrast and tonal rendition is a very good candidate in aerial imagery applications such as image interpretation for defense and security tasks. This algorithm can further be applied to video streaming for aviation safety. In this paper the latest version of the proposed algorithm which is able to enhance aerial images so that the enhanced images are better then direct human observation, is presented. The results obtained by applying the algorithm to numerous aerial images show strong robustness and high image quality.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116826371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-11DOI: 10.1109/RAST.2009.5158191
Namik K. Alpaydin, H. Turkmen
In this study, the dynamic behavior of the sandwich panels subjected to the impact load are investigated experimentally and numerically. For this purpose, the sandwich panels are manufactured using the honeycomb core material and laminated composite face sheets. The face sheet materials used in this study are manufactured using an aramid fabric and epoxy resin. The wet hand lay-up technique is used to produce the sandwich panel. The curing is achieved by using a heated vacuum table. The panel is fixed at all edges and the impact load is applied on the panel. The dynamic response of the panel is measured using the strain gauges. The panel is also modeled using Ansys finite element software. The analysis of the impact test is achieved. The numerical and experimental results are compared. The results are found in an agreement. The final results are concluded.
{"title":"The dynamic response of the sandwich panel subjected to the impact load","authors":"Namik K. Alpaydin, H. Turkmen","doi":"10.1109/RAST.2009.5158191","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158191","url":null,"abstract":"In this study, the dynamic behavior of the sandwich panels subjected to the impact load are investigated experimentally and numerically. For this purpose, the sandwich panels are manufactured using the honeycomb core material and laminated composite face sheets. The face sheet materials used in this study are manufactured using an aramid fabric and epoxy resin. The wet hand lay-up technique is used to produce the sandwich panel. The curing is achieved by using a heated vacuum table. The panel is fixed at all edges and the impact load is applied on the panel. The dynamic response of the panel is measured using the strain gauges. The panel is also modeled using Ansys finite element software. The analysis of the impact test is achieved. The numerical and experimental results are compared. The results are found in an agreement. The final results are concluded.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121887423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-11DOI: 10.1109/RAST.2009.5158199
B. Afzali, M. Ahangar, H. Karimi
The primary purpose of this paper is to simulate the “stored gas type pressurizing system” for propellant tanks in a launch vehicle. Preventing the cavitation occurrence in propellant pumps (as the propulsion requirement) and providing required level of pressure in propellant vessels to prevent them from buckling against external aerodynamic forces (as the structural requirement) are the two most important goals of this system. In this paper primarily the basic equations have been derived. A quasi-steady iterative process has been selected to march in time domain. The simulation has been done with time marching steps to take into account the prediction of pressure change in propellant vessels' ullage and propellant pumps' inlet flow during the working time. An optimization has been done to obtain the best system properties such as cutting time and the minimum number of supplier capsules which should be carried by the launch vehicle.
{"title":"Simulation and optimization of stored gas pressurizing system for liquid propellant tanks in a launch vehicle","authors":"B. Afzali, M. Ahangar, H. Karimi","doi":"10.1109/RAST.2009.5158199","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158199","url":null,"abstract":"The primary purpose of this paper is to simulate the “stored gas type pressurizing system” for propellant tanks in a launch vehicle. Preventing the cavitation occurrence in propellant pumps (as the propulsion requirement) and providing required level of pressure in propellant vessels to prevent them from buckling against external aerodynamic forces (as the structural requirement) are the two most important goals of this system. In this paper primarily the basic equations have been derived. A quasi-steady iterative process has been selected to march in time domain. The simulation has been done with time marching steps to take into account the prediction of pressure change in propellant vessels' ullage and propellant pumps' inlet flow during the working time. An optimization has been done to obtain the best system properties such as cutting time and the minimum number of supplier capsules which should be carried by the launch vehicle.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117185730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-11DOI: 10.1109/RAST.2009.5158183
G. Kiper, Eres Soylemez
Deployable structures are mobile assemblies which do not aim motion but to attain different configurations depending on the service requirements. These structures are widely used in space applications due to storage limitations of the launch vehicles. The large diversity of design alternatives should be evaluated in design of deployable parts of spacecrafts. This study aims to present design alternatives of antennas, masts and solar panels of space devices. Also use of spatial linkages in deployable structure designs is discussed.
{"title":"Deployable space structures","authors":"G. Kiper, Eres Soylemez","doi":"10.1109/RAST.2009.5158183","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158183","url":null,"abstract":"Deployable structures are mobile assemblies which do not aim motion but to attain different configurations depending on the service requirements. These structures are widely used in space applications due to storage limitations of the launch vehicles. The large diversity of design alternatives should be evaluated in design of deployable parts of spacecrafts. This study aims to present design alternatives of antennas, masts and solar panels of space devices. Also use of spatial linkages in deployable structure designs is discussed.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133685130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-11DOI: 10.1109/RAST.2009.5158218
E. Roumenina, V. Vassilev, Kalin Ruskov
A methodology for cartography and assessment of the degree of man-induced transformation on an urban territory based on extraction of thematic information from very high resolution multi spectral Quickbird image is presented in the present paper. The proposed methodology includes 10 work stages and it has been examined on a highly fragmented urban territory (including forested and agricultural lands) of the Gniliane district, city of Novi Iskar, municipality of Sofia, Bulgaria. A land cover classification scheme for the studied area was created and 11 land cover classes are established for the classification second level, depending on the differences in their spectral reflectance. Three levels for automatic identification of the land cover classes on the multi spectral image were applied in ERDAS Imagine: 1) Unsupervised classification; 2) Supervised classification with non-parametric rule of parallelepiped and a parametric rule of maximum likelihood; and 3) Fuzzy convolution filter. A large scale land use map is composed on the base of land cover classification as the land cover classes have been transformed to 7 land use categories depending on the possibilities for recovery of the anthropogenic changes on the environment. A rank of man-induced transformation, which values vary from 1 to 10, has been assigned to each category. A large scale assessment map of man-induced transformation is created. The calculated local index of the man-induced transformation in the study area is 466.96 and the highest relative shares in its formation have the categories permanent crop fields, build-up land for residential and industrial purposes, and the forest territories. This index for the study area is slightly higher than the calculated average index for the overall territory of Bulgaria (448.1). The methodology developed proposes an opportunity for quick and objective extraction of thematic information from multi spectral images in order to assess the man-induced transformations of the environment. This allows to take the right decisions in planning, and to conduct a regional policy which ensures a sustainable development of the environment.
{"title":"Large scale cartography and analyses of man-induced transformation in an urban area using satellite imagery with very high resolution","authors":"E. Roumenina, V. Vassilev, Kalin Ruskov","doi":"10.1109/RAST.2009.5158218","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158218","url":null,"abstract":"A methodology for cartography and assessment of the degree of man-induced transformation on an urban territory based on extraction of thematic information from very high resolution multi spectral Quickbird image is presented in the present paper. The proposed methodology includes 10 work stages and it has been examined on a highly fragmented urban territory (including forested and agricultural lands) of the Gniliane district, city of Novi Iskar, municipality of Sofia, Bulgaria. A land cover classification scheme for the studied area was created and 11 land cover classes are established for the classification second level, depending on the differences in their spectral reflectance. Three levels for automatic identification of the land cover classes on the multi spectral image were applied in ERDAS Imagine: 1) Unsupervised classification; 2) Supervised classification with non-parametric rule of parallelepiped and a parametric rule of maximum likelihood; and 3) Fuzzy convolution filter. A large scale land use map is composed on the base of land cover classification as the land cover classes have been transformed to 7 land use categories depending on the possibilities for recovery of the anthropogenic changes on the environment. A rank of man-induced transformation, which values vary from 1 to 10, has been assigned to each category. A large scale assessment map of man-induced transformation is created. The calculated local index of the man-induced transformation in the study area is 466.96 and the highest relative shares in its formation have the categories permanent crop fields, build-up land for residential and industrial purposes, and the forest territories. This index for the study area is slightly higher than the calculated average index for the overall territory of Bulgaria (448.1). The methodology developed proposes an opportunity for quick and objective extraction of thematic information from multi spectral images in order to assess the man-induced transformations of the environment. This allows to take the right decisions in planning, and to conduct a regional policy which ensures a sustainable development of the environment.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129646678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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