Invited Papers -- Visual Analytics for Geographic Analysis, Exemplified by Different Types of Movement Data -- Application of Self-Organizing Maps to the Maritime Environment -- CIS & GIS -- Concept for Corporate Information Systems Development Based on GIS Technologies -- Data Harmonization in CIS -- iRank: Integral Ranking of Geographical Information by Semantic, Geographic, and Topological Matching -- GIS as a Basis for Monitoring System -- A Multiscale and Multimodal Transportation GIS for the City of Guangzhou -- GIS for Profile-Based Context Formation in Situation Management -- Immunocomputing for Geoinformation Fusion and Forecast -- Ontologies and Programming Technologies for GIS and GIS Application -- A Model-driven Approach for Designing Adaptive Web GIS Interfaces -- Semantic Similarity Applied to Geomorphometric Analysis of Digital Elevation Model -- Dynamic Models of Geographic Environment using Ontological Relations -- Geospatial Information Integration Approach Based on Geographic Context Ontologies -- An Approach to Comparing Different Ontologies in the Context of Hydrographical Information -- A Web-Service Approach for Multi-Sensor Data Fusion and Geographic Information Systems -- Monitoring of Terrorist Threat Based on GIS -- Theoretical Investigation of Terrorism. Ontology Development -- Terrorists: Statistical Profile -- Geographical Information System for analysis of Critical Infrastructures and their hazards due to terrorism, man-originated catastrophes and natural disasters for the city of Gdansk -- Maritime GIS -- IGIS Capabilities Application to Controlling Polystatic Detection Systems Ensuring Security of Marine Economic Activity -- Real-time Web-based GIS for Analysis, Visualization and Integration of Marine Environment Data -- On Optimizing Search Efforts (Area Effectively Swept) Allocation in the Course of Search and Rescue Operations -- Information Assurance and Protection in GIS -- Design of Entrusting Protocols for Software Protection -- Vector Finite Groups as Primitives for Fast Digital Signature Algorithms -- Multisignature Protocols and Problem of Simultaneous Signing a Package of Contracts -- Integrated Usage of Data Mining Methodsfor Malware Detection -- Schemes for Data and User Authentication in Distributed GIS. This volume contains the papers presented at the International Workshop "Information Fusion and Geographic Information Systems" (IF&GIS'09) held in St. Petersburg, Russia in May 2009. The workshop was organized by the St. Petersburg Institute for Informatics and Automation of the Russian Academy of Sciences (SPIIRAS). The workshop continues a series organised biannually, and attracts academics and industrials from a wide range of disciplines including computer science, geography, statistics, mathematics, hydrography, geomorphology, and environmental sciences. The objective of this workshop is to provide a forum for innovative research oriented towards Geographic Information Science and tech- logies and Corporate Information Systems whose close association highlight novel theoretical and practical challenges. The papers selected by the International Program Committee cover a wide range of innovative areas including ontological and semantic approaches for the representation of geographical data, geographical data monitoring, situation management and forecast, to emerging applications oriented to the maritime environment, disaster management and security threats. While traditional topics of GIS conferences are well represented and still being advanced, several new domains appear and stress the need for the development of versatile monitoring systems and decision making systems. While GIS already have a de facto standard for geographical monitoring and analysis, the papers accepted in this volume also illustrate several novel directions of application whose objective is more closely oriented to process modeling and decision making, and where the nature of the objects represented is revisited using ontological and semantic approaches.