In 2010 the International Charter Space and Major Disasters was activated to record extensive floods in Slovenia. On obtained time series of medium resolution radar (ENVISAT, RADARSAT-2) and optical images pixel-based water delineation and object-based classification were perfomed. In talks advantages and restrictions of these methods, data used and their results were examined and compared. Important step in the integration of research and the wider public, working with the consequences and/or prevention against disasters was attained, and raising public awareness of the products of satellite systems at such events.
B.04 Guest lecture
Within the activation of International Charter on Space and Major Disasters following intensive rains in Slovenia between 17.–19.9. 2010, a time series of radar satellite images and some optical were obtained, and used to study flood dynamics in the surroundings of capital Ljubljana and on karstic fields, as well as local water retention and/or retreat. Radar images enabled satisfactory near-real-time comprehension of flood dynamics within wider natural environment, however not in urban areas. Various data enabled detailed examination of data type potential in disaster mapping. The final report summarizes the processing and results of all mappings and all data in a larger area in central Slovenia.
D.01 Chairing over/coordinating (international and national) projects
In the last decade object-based analysis, in particular object-based classification, have been used for the identification and mapping of land use from VHR satellite imagery. In this paper a method mentioned was used in order to map the Kibera informal settlement (slum) in the heart of Nairobi city, Kenya. The results of object-based classification of residential facilities are connected with the available census data obtained on a sample of the population in the villages, and related deviations are then stressed. By change detection applied we note in which parts of the informal settlements in recent years, the settlement pressure occurred. The study is the result of the MapKibera Project/Trust, which seeks to obtain spatial information, and improve living conditions in the Kibera settlement. The aim of cooperation is to assist the MKT initiative in the processing of satellite data and the first mapping of the entire slum.
D.08 Management and development of research activities
With high-resolution remote sensing methods (digital aerophotogrametry, multispectral satellite recording, laser scanning and radar recording) spatial information relevant to the acquisition and maintenance of national topographic data can be obtained. Slovenian national topographic data are maintained at different levels of scales, in various forms, display and media formats and in different time periods. The project aim is to identify optimal methods and technologies for the detection of topographic objects and their changes from the combination of various sources of remote sensing and use of semi-automated or automated procedures. The survey is a synergistic collaboration between four research organizations, and includes the following steps: (1) the study of data derived from operationaly already established technologies, (2) making the study of available resources and their characteristics and to study their possible implementation in capture and updating of topographic data (3) survey also covers procedures, identification and maintenance of topographic data, (4) investigate the possibility of implementation of various automatic or semiautomatic procedures, (5) analysis of the potential use of various methods of implementation of digital aerophotogrammetry with satellite raster data and lidar recordings. In the study we have successfully implemented the methodology of object-oriented image analysis for mapping of seleczed topographic objects (vegetation, roads) in scale 1: 5000.
D.08 Management and development of research activities
Centre of Excellence SPACE-SI is in the process of development and implementation of complete processing chain from raw satellite images to web-delivered map-ready images and products. The main goal is to develop a near-real-time processing chain workflow that operates fully automatic with no operator's intervention required. The knowledge on object-based image analysis was promoted and used within specification of the radiometric corrections module and definition of chain outputs.
D.08 Management and development of research activities