Gholamreza Fallahi

Abstract: The overlay functions in GIS are well known and often needed tools for integrating different factors and generating useful information for decision makers. Both the integration model and the generated information usually rely on crisp set theory. In many cases, either the boundaries of classes are not clearly defined, or the classification of a feature into a class is not obvious. In such cases, overlay based on fuzzy set and fuzzy logic is unavoidable. The aim of this study is to develop overlay functions on the basis of fuzzy logic and to examine the usability of such functions in integrating data related to indeterminate aspects of a phenomenon. To implement and examine the idea, an application program is developed using VBA programming language and the available Arc Object library. Using this application, a user can generate fuzzy data and use different fuzzy overlay functions to integrate those data. To test the applicability of the model and application, the suitable...

Abstract: The overlay functions in GIS are well known and often needed tools for integrating different factors and generating useful information for decision makers. Both the integration model and the generated information usually rely on crisp set theory. In many cases, either the boundaries of classes are not clearly defined, or the classification of a feature into a class is not obvious. In such cases, overlay based on fuzzy set and fuzzy logic is unavoidable. The aim of this study is to develop overlay functions on the basis of fuzzy logic and to examine the usability of such functions in integrating data related to indeterminate aspects of a phenomenon. To implement and examine the idea, an application program is developed using VBA programming language and the available Arc Object library. Using this application, a user can generate fuzzy data and use different fuzzy overlay functions to integrate those data. To test the applicability of the model and application, the suitable...

Organizations whose activities involve drilling in city of Tehran cause several damages to urban resources as well as wasting money and human resources, as a result of lack of information about underground facilities, not collaborating to share information with other organizations and inaccurate data. However, if these organization share a standardized set of geospatial data in a unified comprehensive network and develop methods to discover, access and use of this information, can prevent collision of drilling paths. Local Spatial Data Infrastructure (LSDI) prepares a way for these organizations to share spatial data and have access to the recently updated information of other organizations. From the point of view of SDI, to achieve this level of collaboration, several activities should be considered; one of which is interoperability among geospatial information systems. This goal is attained when these systems have full structural, syntactic and semantic comprehension of each other...

A safe, flexible and economical manipulation of huge amount of data could be realized, if a useroriented and/or purpose-oriented data set from source data model could be created automatically by means of generalization. In this paper, first, three operational methods called "algorithmic method, artificial intelligence (expert system) and amplified intelligence" have been compared to each other. Amplified intelligence approach has been proposed. Generalization operators such as selection/elimination, simplification, aggregation and so on perform digital data transformation in a digital generalization system based on amplified intelligence approach. These generalization operators, which are maintained in a NTDB generalization application prototype based on amplified intelligence approach, called NTDBGeneralizer and developed in MDL (MicroStation Development Language) by G.R. Fallahi, have been discussed. The knowledge needed for generalization of INTDB's data at scale 1:...

3 Abstract: The overlay functions in GIS are well known and often needed tools for integrating different factors and generating useful information for decision makers. Both the integration model and the generated information usually rely on crisp set theory. In many cases, either the boundaries of classes are not clearly defined, or the classification of a feature into a class

... A Message is the basic unit of communication between a Web Service and a Client; data to be communicated to or from a Web Service as a single logical transmission." This implies that there should be a ... [Peuquet et al, 1999] Peuquet, DJ, Smith, B., & Brogaard, B. 1999, "The ...

Organizations whose activities involve drilling in city of Tehran cause several damages to urban resources as well as wasting money and human resources, as a result of lack of information about underground facilities, not collaborating to share information with other organizations and inaccurate data. However, if these organization share a standardized set of geospatial data in a unified comprehensive network