The aim of this study is to demonstrate the use of Pi-SAR (polarimetric and interferometric synthetic aperture radar) data for the extraction of different thematic information for urban planning and management. For this end, different relief topography related thematic information as well as a land cover map are generated from the Pi-SAR data. The thematic maps related to terrain topography are...

This work presents a proposal for an algebra of geographical fields. Geographical fields are the mathematical expression of continuously-varying spatial data, such as thematic maps, digital terrain models and satellite imagery. The paper outlines an initial proposal for an algebra of geographical fields that enables the definition of operations based on the properties of geographical data, inde...

Glossary of Terms p. 15 Program Description1 Bright Beginnings is an early childhood curriculum, based in part on the High/Scope® and The Creative Curriculum® models, with additional emphasis on building early language and literacy skills. The curriculum consists of nine thematic units designed to enhance cognitive, social, emotional, and physical development. Each unit includes concept maps, l...

This paper presents a model for quantitative risk analysis with the application of geographic information systems (GISs) using Bayesian theory. It was used for the thematic integration of maps in a natural state (vegetation, geological-geotechnical, natural drainage and gradient). A landslide susceptibility map was produced based on this integration associated with vulnerability data (time and ...

The delineation and classification of forest stands is a crucial aspect of forest management. Object-based image analysis (OBIA) can be used to produce detailed maps of forest stands from either orthophotos or very high resolution satellite imagery. However, measures are then required for evaluating and quantifying both the spatial and thematic accuracy of the OBIA output. In this paper we pres...

An integrated approach with remote sensing, GIS and traditional fieldwork techniques was adopted to assess the groundwater potential in the central highlands of Eritrea. Digitally enhanced color composites and panchromatic images of Landsat TM and Spot were interpreted and thematic maps on lithology and lineaments prepared. Structural features were measured in the field and orientations compare...

Traditional change detection approaches have been proven to be difficult in detecting vegetation changes in the moist tropical regions with multitemporal images. This paper explores the integration of Landsat Thematic Mapper (TM) and SPOT High Resolution Geometric (HRG) instrument data for vegetation change detection in the Brazilian Amazon. A principal component analysis was used to integrate ...

Queries to generate a map from geographic databases are too large and complex for users to specify all components in it. Thematic parts of the map should be described by users as ad hoc queries. However, background parts of it should be inferred from users' queries corresponding to the thematic parts. Furthermore, it is important for the map systems to lead users' constructing their ad hoc quer...

Geospatial databases are needed for many tasks in civilian and military applications. Automated building detection and description systems attempt to construct 3-D models using primarily PAN (panchromatic) images. These systems can make use of cues derived from other sensor modalities to make the task easier and more robust. The recent development of hyperspectral sensors such as HYDICE (HYpers...

The combination of Geographic Data Warehouses (GDW) and Spatial OLAP (SOLAP) provide efficient browsing and storing of very large spatio-temporal databases. However, some advanced techniques of geovisualization are not well supported in many of these tools. Three-dimensional Thematic Mapping through Virtual Globes is one of them, and it can provide a friendly but powerful mechanism for summariz...