Technology Forum - Data Migration, Visualization and Modelling

Simon Fonji
University of Memphis

Ecological Niche Modelling using Cluster Analysis to Determine Suitable Environments for Giant Hogweed Occurrence
Many of the methods combine environmental variables and species presence and/or species absence data to predict suitable habitats for species. This study uses cluster analysis of environmental variables (distance to roads, distance to rivers, distance to urban centers, elevation, slope, and land use land cover change (lulcc)) to identify a set of environmental conditions that promote the spread of poisonous invasive Giant Hogweed in Latvia using Giant Hogweed presence data only. Four groups of suitable environmental conditions were identified in areas of: 1) moderate elevation, low slopes, near low population centers and where the predominant land cover type is agriculture, 2) low elevation, near roads and urban centers and in neighborhoods where land cover change to both agriculture and urban is high, 3) Occurs in areas of low elevation and low slope, close to urban centers, in neighborhoods of high forest proportion and where land cover change to forest is common, and near high population centers, 4) Cluster four: low elevation with steep slopes, near roads, near urban centers and close to water bodies and high population centers. The predominant neighborhood land cover type in this cluster is agriculture and this cluster occurs in areas with little or no neighbourhood land cover change. The results from cluster analyses were used to produce a Giant Hogweed suitability map.
Katalin Zsoldi
Eötvös Loránd Univesity

Economic and Social data in 3D Thematic Maps
The 3D technology became a new tendency in cartography, the 3D visualization got more popular in last years. Thematic maps are the best solution to present the economic and social data. Using the 3D and animation in thematic maps, we can represent more information than using traditional, 2D methods. My research theme is to develop new 3D and animated presentation modes based on the traditional methods of representation used in cartography, helping the visualization of complex data in 5-15 year time series. Using 3D can be easily make difference on tendencies and relationships between data. In my presentation are included examples displaying different economic and social data like: livestock change between 2000-2009, unemployment data between 2004 and 2009, internal migration in Hungary. This 3D thematic maps can be used by experts, they are useful to analyze data, to help the strategy planning, and they are widely used in social geography too. The 3D thematic maps are useful in education, helps the student understand the curriculum in universities, in high schools and in Elementary schools. The small children can read and understand better the 3D animated maps than the 2D paper ones. Not only in education, but also in informing materials can use 3D thematic maps.
Ooi Wei Han
Research Officer
National Space Agency (ANGKASA)

OoiWeihan was received his degree in Geomatics Engineering at University Technology of Malaysia in 2004 and Master in GIS and Geomatics Engineering at University Putra Malaysia in 2006. He joined National Space Agency of Malaysia, an agency under the Malaysian Ministry of STI, works as a Research Officer until now. He works in space application and technology development division with specific responsibilities on R&D programs and activities related to spatial satellite technology and application.

Integrity Monitoring System for Space-Based Navigation and Positioning In Malaysia
In Malaysia, navigation technology has become an essential tool in various applications for positioning in military and civilian sectors. With the full operational constellation and modernisation of the GNSS such as GPS and GLONASS, the accuracy of positioning has definitely improved. On the other hand, the integrity of the navigation system itself is crucial to provide reliable positioning service. It was a number of different signals in failure modes that resulted significant position errors, and there is a need to authenticate and monitor the integrity on received GNSS signals in order to detect any signal anomalous continuously. The National Space Agency (ANGKASA) in collaboration with Universiti Teknologi Malaysia (UTM) is currently in the midst of developing an integrity monitoring system for space-based positioning in Malaysia. Several new GNSS CORS will be established in Peninsular Malaysia and later integrate with the existing Marine Department's DGPS stations. The developed system will be able to determine the signal quality and integrity, as well as identify the DGPS errors and corrections in real-time mode. A dedicated website will also be provided for the user to assess the information and as well as providing an alert once the monitored parameters exceed specified thresholds.