The development and the use of clearing house server infrastructure for gis interoperabilty

Rapid development of internet technology allows more spatial and tabular data available and accessible publicly. But those data can not be utilized directly due to the differences in data acquisition techniques, data definition and their semantic meaning. This situation reveals the need of interoperable GIS to support seamless information sharing. This is the future GIS architecture that may increase the reusability of available spatial datasets and reduce data acquisition cost. Under the whole framework of the on going research has identified four components (modules) to support the application of GJS interoperability. This paper discusses the development and the use of clearinghouse component (module) to facilitate end users to search, locate and retrieve the required spatial information or meta data from different organization at different time and places. This allows making further enquire about particular spatial data-information. The detail discussions on GIS Interoperability model as well as the development of architecture of these clearinghouse servers are given. The development of clearing house server employs an open sources approach and open file format. In this regards, fully available source code allows modification and customization without licensing restrictions

Spatial data management for livestock distribution in Ethiopia

Ethiopia has the largest livestock population in Africa. It is estimated at 105 million tropical livestock units, which includes 49.3 million heads of cattle, 47 million heads of sheep and goat, 8.3 million equines, 760 thousand camels and a poultry population of 38.13 million. The sector contributes to the livelihood of 60-70% of the Ethiopian population - this translates into approximately 44-52 million people whose subsidiary needs and economic activities rely on livestock production. Understanding the spatial distribution of livestock species is crucial in order to devise a feasible and geographically targeted livestock development policy. The aim of this study is to identify the research gap on the spatial distribution of livestock in LIVES project and to fill the gap by reviewing different literatures and related works. Besides, we proposed and developed a web-based spatial data management application for the LIVES project that makes use of researchers and academicians to have a ground reference to make further research and improve the internal operations of the organization, raises community satisfaction, and simplifies spatial data management and exchange. In order to conduct and justify this project we reviewed different journal articles and related works. In addition we have discussed with the GIS expert of LIVES project. In the mean time we have also collected livestock shape files from the LIVES project so as to use as an input to the proposed prototype web based application. Through the course of this project we were able to observer and identify that the LIVES project handles and manages their spatial data using ArcGIS Desktop application that lacks to handle and render up-to-date and quality livestock information via the web. We believed that having a web based application is necessary to permit timely livestock information dissemination, easy access, and render up-to-date livestock information to the ix public. Furthermore, it improves the efficiency of spatial data management and provides quality of services through the web

XGIS Flex : um framework livre para o desenvolvimento de sistemas de informações geográficas para a WEB

Dissertação (mestrado)—Universidade de Brasília, Instituto de Geociências, Programa de Pós-Graduação em Geociências, 2013.Esta dissertação de mestrado apresenta dois estudos de caso relacionados a arquiteturas de implantação de sistemas de informações geográficas (SIG) em ambiente web que culminaram no desenvolvimento de um framework composto por um conjunto de componentes de apoio à construção de novos softwares de SIG para web. O primeiro estudo foi realizado com foco na interoperabilidade de serviços de mapas na web, contemplando principalmente as funções de consulta e disponibilização de dados em formatos diversos. Para viabilizar a troca e integração de informações espacializadas, foi necessário o desenvolvimento de alguns componentes que foram escritos sobre tecnologias proprietárias tais como Esri Flex API. Entendidas as limitações que um motor central de código fechado poderia trazer ao objeto principal do estudo, isto é, o desenvolvimento de uma arquitetura de intercâmbio de informações geográficas, surgiu a idéia de construir um conjunto de software que contornassem tais dificuldades. O segundo estudo foi realizado com foco na elaboração de um framework livre para desenvolvimento de SIG em ambiente web de padrão Rich Internet Application (RIA) e que seguisse conceitos da Web 2.0, possibilitando a indexação e visualização de dados provenientes de diferentes tipos de mídia (fotografias, vídeos, documentos) que fossem aderentes aos padrões da Open Geospatial Consortium (OGC), mas que, ainda assim, fossem possíveis de serem compartilhadas com outros formatos de dados. Este último estudo buscou ainda reduzir a complexidade e custos de implantação de projetos dessa natureza e facilitar a customização por parte de usuários finais. Ao conjunto de códigos desenvolvidos e sua arquitetura, foi dado o nome de XGIS Flex Framework. ______________________________________________________________________________ ABSTRACTThis MSc. Thesis presents two study cases related to the architectures of implementation of geographical information systems (GIS) in web environment that ended in the development of a framework composed by a set of components supporting the preparation of new web GIS software packages. The first study was conducted focused on the interoperability of map services in the web, mainly covering the functions of consultation and release of data at varying formats. In order to enable exchange and integration of spatial information, it was necessary to develop components based on proprietary technologies like ESRI Flex API. After understanding the limitations that a central engine of closed source code could bring to the main object of study, that is, the development of an architecture for the exchange of geographic information, we came out with the idea of building a set of software that would circumvent such difficulties. The second study was conducted focusing on the preparation of a free framework for development of GIS in an environment of Rich Internet Application (RIA) and Web 2.0 concepts. The purpose here was to enable indexing and visualization of data from different types of media (photos, videos, documents) that were adherent not only to the standards of the Open Geospatial Consortium (OGC), but also to other data formats. The latter study also sought to reduce the complexity and costs of implementation of such projects and to facilitate customization by end users. This set of developed softwares and its architecture was named XGIS Flex Framework

Towards a desing method for 3D collaborative GIS

Our thesis work focuses on collaborative 3D GIS and considers two main aspects governing their implementation: a conceptual framework for an approach to design these systems and a technical framework dealing with the main issues of integration of multiple data sources from different partners in a 3D collaborative database

The Development and Customization of GIS-Based Applications and Web-Based GIS Applications with the CASE Tool AIGLE

In this paper, we propose a visual CASE Tool named Aigle with multiple abstraction levels including a visual language (oriented end-user) and a technical visual language context (oriented designer) for Geographic Information Systems. This CASE Tool addresses the problem of the customizations of GIS applications on several marketed GIS platforms. The use of visual language is suitable for the readability of high level diagrams by non-expert end-users. AIGLE generates automatic customized GIS-Based Applications and Web-Based GIS Applications thanks to a userfriendly interface. Thus the designers can save 95% of the time spent on developing. More over a visual object oriented method is proposed to facilitate the design of spatial applications Keywords CASE tools, Conceptual Modeling, Spatial Database, Geographic Information Systems (GIS), Web-Based GIS, GIS-Based Applications, Visual Languages. 1

Framework for Automatic Identification of Paper Watermarks with Chain Codes

Title from PDF of title page viewed May 21, 2018Dissertation advisor: Reza DerakhshaniVitaIncludes bibliographical references (pages 220-235)Thesis (Ph.D.)--School of Computing and Engineering. University of Missouri--Kansas City, 2017In this dissertation, I present a new framework for automated description, archiving, and identification of paper watermarks found in historical documents and manuscripts. The early manufacturers of paper have introduced the embedding of identifying marks and patterns as a sign of a distinct origin and perhaps as a signature of quality. Thousands of watermarks have been studied, classified, and archived. Most of the classification categories are based on image similarity and are searchable based on a set of defined contextual descriptors. The novel method presented here is for automatic classification, identification (matching) and retrieval of watermark images based on chain code descriptors (CC). The approach for generation of unique CC includes a novel image preprocessing method to provide a solution for rotation and scale invariant representation of watermarks. The unique codes are truly reversible, providing high ratio lossless compression, fast searching, and image matching. The development of a novel distance measure for CC comparison is also presented. Examples for the complete process are given using the recently acquired watermarks digitized with hyper-spectral imaging of Summa Theologica, the work of Antonino Pierozzi (1389 – 1459). The performance of the algorithm on large datasets is demonstrated using watermarks datasets from well-known library catalogue collections.Introduction -- Paper and paper watermarks -- Automatic identification of paper watermarks -- Rotation, Scale and translation invariant chain code -- Comparison of RST_Invariant chain code -- Automatic identification of watermarks with chain codes -- Watermark composite feature vector -- Summary -- Appendix A. Watermarks from the Bernstein Collection used in this study -- Appendix B. The original and transformed images of watermarks -- Appendix C. The transformed and scaled images of watermarks -- Appendix D. Example of chain cod