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It is our great pleasure to introduce the papers of the proceedings of the 9th International Symposium on Spatial and Temporal Databases – SSTD 2005. This year’s symposium continues the tradition of being the premier forum for the presentation of research results and experience reports on leading edge issues of spatial and temporal database systems, including data models, systems, applications and theory. The mission of the symposium is to share innovative solutions that fulfill the needs of novel applications and heterogeneous environments and identify new directions for future research and development. SSTD 2005 gives researchers and practitioners a unique opportunity to share their perspectives with others interested in the various aspects of database systems for managing spatial and temporal data and for supporting their applications. A total of 77 papers were submitted this year from several countries. After a thorough review process, the program committee accepted 24 papers covering a variety of topics, including indexing techniques and query processing, mobile environments and moving objects, and spatial and temporal data streams. We are very pleased with the variety of the symposium’s topics, and we are proud of the resulting strong program.

Database management. --- Earth sciences. --- Information storage and retrieval. --- Application software. --- Artificial intelligence. --- Information technology. --- Business—Data processing. --- Database Management. --- Earth Sciences, general. --- Information Storage and Retrieval. --- Information Systems Applications (incl. Internet). --- Artificial Intelligence. --- IT in Business. --- Database management --- Geographic information systems --- Temporal databases

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It is our great pleasure to introduce the papers of the proceedings of the 9th International Symposium on Spatial and Temporal Databases – SSTD 2005. This year’s symposium continues the tradition of being the premier forum for the presentation of research results and experience reports on leading edge issues of spatial and temporal database systems, including data models, systems, applications and theory. The mission of the symposium is to share innovative solutions that fulfill the needs of novel applications and heterogeneous environments and identify new directions for future research and development. SSTD 2005 gives researchers and practitioners a unique opportunity to share their perspectives with others interested in the various aspects of database systems for managing spatial and temporal data and for supporting their applications. A total of 77 papers were submitted this year from several countries. After a thorough review process, the program committee accepted 24 papers covering a variety of topics, including indexing techniques and query processing, mobile environments and moving objects, and spatial and temporal data streams. We are very pleased with the variety of the symposium’s topics, and we are proud of the resulting strong program.

Database management. --- Earth sciences. --- Information storage and retrieval. --- Application software. --- Artificial intelligence. --- Information technology. --- Business—Data processing. --- Database Management. --- Earth Sciences, general. --- Information Storage and Retrieval. --- Information Systems Applications (incl. Internet). --- Artificial Intelligence. --- IT in Business. --- Database management --- Geographic information systems --- Temporal databases

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This book presents the proceedings of the 4th International Symposium on large Spatial Databases, SSD '95, held in Portland, Maine, USA in August 1995. The 23 refereed full papers presented were selected from more than 60 submissions and describe the state-of-the-art in the expanding field of large spatial databases, with a certain emphasis on an upcoming new generation of spatial database management systems. The volume is organized in sections on spatial data models, spatial data mining, spatial query processing, multiple representations, open GIS, geo-algorithms, reasoning about spatial relations, spatial joins, and benchmarks.

Geographic information systems --- Systèmes d'information géographique --- Congresses. --- Congrès --- Systèmes d'information géographique --- Congrès --- Congresses --- Information theory. --- Computer science. --- Data structures (Computer scienc. --- Theory of Computation. --- Data Storage Representation. --- Data Structures and Information Theory. --- Informatics --- Science --- Communication theory --- Communication --- Cybernetics --- Geographic information systems - Congresses.

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GeoS 2005wasthe 1st InternationalConferenceon GeospatialSemantics. It was held in Mexico City, November 29 and 30, 2005. Within the domain of geographic information science (GIS), semantics has become one of the most prominent researchthemes over the last few years.Such concepts as ontology-driven geographic information systems and the geospatial Semantic Web have fuelled a plethora of researchin such areas as geo-ontologies andsemanticsimilarity.ThesetopicscomplementthetraditionalfocusinGIS- search, which has dealt primarily with geometric entities, their spatial relations, and e?cient data structures. Geospatial semantics are expected to play an - creasingly important role for next-generation spatial databases and geographic information systems, as well as for specialized geospatial Web services. GeoS2005wasorganizedinordertoprovideaforumfortheexchangeofsta- of-the-art research results in the areas of modeling and processing of geospatial semantics. Of particular interest were contributions that addressed theories for geospatialsemanticinformation;formalrepresentationsforgeospatialdata;m- elsandlanguagesforgeo-ontologies;alignmentandintegrationofgeo-ontologies; integration of semantics into spatial query processing; similarity comparisons of spatial datasets; ontology-based spatial information retrieval; ontology-driven GIS; geospatial Semantic Web; and multicultural aspects of spatial knowledge. This volume contains 19 papers, which were selected from among 42 subm- sions received in response to the Call for Papers. Each submission was reviewed by three or four Program Committee members and 15 long and 4 short papers were chosen for presentation. Authors of papers included in this volume come from11di?erentcountries,highlightingthebreadthoftheinternationalresearch community that focuses its attention on geospatial semantics. The program was rounded o? with an invited keynote by Jerry Hobbs, and poster presentations.

Database management. --- Information storage and retrieval. --- Artificial intelligence. --- Application software. --- Earth sciences. --- Information technology. --- Business—Data processing. --- Database Management. --- Information Storage and Retrieval. --- Artificial Intelligence. --- Information Systems Applications (incl. Internet). --- Earth Sciences, general. --- IT in Business.