Browsing by Author Tran, Quoc Binh

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  • TC_02615.pdf.jpg
  • Article


  • Authors: Tran, Quoc Binh; Nguyen, Thanh Thuy (2008)

  • Digital Elevation Model (DEM) is an important component of GIS applications in many socio-economic areas. Especially, DEM has a very important role in monitoring and managing natural resources, preventing natural hazards, and supporting spatial decision making. Usually, DEM is built by interpolation from a limited set of sample points. Thus, the accuracy of the DEM is depended on the used interpolation method. By analyzing the data of experimental DEM creation using three popular interpolation techniques (inverse distance weighted - IDW, spline, and kriging) in four different survey projects (Thai Nguyen, Go Cong Tay, Co Loa, and Duong Lam), the paper has made an assessm...

  • TC_02562.pdf.jpg
  • Article


  • Authors: Tran, Quoc Binh; Le, Phuong Thuy (2007)

  • Public transport is a part of the ontemporary urban model. In Vietnam, the bus system is re-established a few years ago. At the same time, some maps have been published for helping the bus passengers. But hesemaps are still lacked of rich contents and useful functionalities. With the aim to improving the effectiveness of Hanoi public transport system, the authors have applied GIS technology for developing an information system of Hanoi bus. A logical model of the bus network consisting of 2 sub-networks and 5 cost attributes has been designed. This model serves as a basis for developing a bus geodatabase with 5 feature classes. For managing the geodatabase, a set of tools extending ...

  • TC_02589.pdf.jpg
  • Article


  • Authors: Tran, Quoc Binh (2007)

  • Nowadays, digital terrain models (DTM) are an important source of spatial data for  various applications in many scientific disciplines. Therefore, special attention is given to their main characteristic ‐ accuracy. At it is well known, the source data for DTM creation contributes a large amount of errors, including gross errors, to the final product. At present, the most effective method for detecting gross errors in DTM source data is to make a statistical analysis of surface height variation in the area around an interested location. In this paper, the method has been tested  in two DTM projects with various parameters such as interpolation technique, size of neighboring area, th...

  • TC_02570.pdf.jpg
  • Article


  • Authors: Tran, Quoc Binh (2007)

  • In the method of creating digital terrain model (DTM) by using digital photogrammetry, the picket sampling interval (PSI) plays an important role since it strongly influences on the production effectiveness and on the accuracy of created DTMs. The optimal value of PSI must be balanced between requirements of effectiveness and of accuracy. This research is focused on the influence of PSI onroot mean square error (RMSE) of created DTM and on the number of error pickets (caused by limitation of image matching technique) that must be checked and corrected manually. Based on the results obtained in four experimental areas of Vietnam (Co Loa, Duong Lam, Ba Vi, and Lang Son), the paper has ...

Browsing by Author Tran, Quoc Binh

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 1 to 5 of 5
  • TC_02615.pdf.jpg
  • Article


  • Authors: Tran, Quoc Binh; Nguyen, Thanh Thuy (2008)

  • Digital Elevation Model (DEM) is an important component of GIS applications in many socio-economic areas. Especially, DEM has a very important role in monitoring and managing natural resources, preventing natural hazards, and supporting spatial decision making. Usually, DEM is built by interpolation from a limited set of sample points. Thus, the accuracy of the DEM is depended on the used interpolation method. By analyzing the data of experimental DEM creation using three popular interpolation techniques (inverse distance weighted - IDW, spline, and kriging) in four different survey projects (Thai Nguyen, Go Cong Tay, Co Loa, and Duong Lam), the paper has made an assessm...

  • TC_02562.pdf.jpg
  • Article


  • Authors: Tran, Quoc Binh; Le, Phuong Thuy (2007)

  • Public transport is a part of the ontemporary urban model. In Vietnam, the bus system is re-established a few years ago. At the same time, some maps have been published for helping the bus passengers. But hesemaps are still lacked of rich contents and useful functionalities. With the aim to improving the effectiveness of Hanoi public transport system, the authors have applied GIS technology for developing an information system of Hanoi bus. A logical model of the bus network consisting of 2 sub-networks and 5 cost attributes has been designed. This model serves as a basis for developing a bus geodatabase with 5 feature classes. For managing the geodatabase, a set of tools extending ...

  • TC_02589.pdf.jpg
  • Article


  • Authors: Tran, Quoc Binh (2007)

  • Nowadays, digital terrain models (DTM) are an important source of spatial data for  various applications in many scientific disciplines. Therefore, special attention is given to their main characteristic ‐ accuracy. At it is well known, the source data for DTM creation contributes a large amount of errors, including gross errors, to the final product. At present, the most effective method for detecting gross errors in DTM source data is to make a statistical analysis of surface height variation in the area around an interested location. In this paper, the method has been tested  in two DTM projects with various parameters such as interpolation technique, size of neighboring area, th...

  • TC_02570.pdf.jpg
  • Article


  • Authors: Tran, Quoc Binh (2007)

  • In the method of creating digital terrain model (DTM) by using digital photogrammetry, the picket sampling interval (PSI) plays an important role since it strongly influences on the production effectiveness and on the accuracy of created DTMs. The optimal value of PSI must be balanced between requirements of effectiveness and of accuracy. This research is focused on the influence of PSI onroot mean square error (RMSE) of created DTM and on the number of error pickets (caused by limitation of image matching technique) that must be checked and corrected manually. Based on the results obtained in four experimental areas of Vietnam (Co Loa, Duong Lam, Ba Vi, and Lang Son), the paper has ...