Introduction
Less than ten days ago, a deadly earthquake devastated the Iranian city of Bam, killing more than 30,000 people and injuring another 50,000. It was one of the deadliest natural disasters in modern Iranian history, and similar in destruction to the Roudbar earthquake in northern Iran in 1990. Historical information and all available records show that approximately 130 large earthquakes have taken place in most parts of Iran. Considering the high seismicity of Iran, a comprehensive hazard reduction program was launched in Iran in 1991, but the effectiveness of the measures have been limited by lack of adequate funding and institutional coordination. There is no lack of probabilistic studies on the seismicity of the country as well as fault studies. Comprehensive studies have been performed by Berberian (1999, 2001), Amiri et al. (2003), Sarkar et al. (2003), Modarressi (2002), Walker (2002) and Tehranizadeh (2001, 2002). A more detailed bibliography is presented at the end of this document.
Archiv: Juli 2009
2009 31 Jul
Earthquake Management in Iran
Abgelegt unter: Katastrophenschutz | RSS 2.0 | TB | Tags: Earthquake Management, GIS | Keine Kommentare
2009 24 Jul
2008 Africa Remote Sensing Study
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Aerial and Spaceborne Ten-Year Trends
USGS 2008-2018 Africa Remote Sensing Study
Africa is a continent as large as China, India, Argentina, the United States of America and Western Europe combined. With a population of over 922 million (as of 2005 and projected by the United Nations to reach one billion by 2010) Africa has four main regional languages (i.e. English, French, Portuguese and Arabic) and almost 200 local languages. The three largest countries in Africa in terms of population are Nigeria (133 million as of 2006), Egypt (79 million) and Ethiopia (77 million). Africa faces some of the greatest geospatial data needs and issues found anywhere in the world, considering the high levels of poverty, deforestation and desertification, coupled with the political and societal unrest in individual countries. The USGS 2008 Africa Remote Sensing Study received an excellent response rate of 377 respondents from over 30 countries; as compared to a 2005 GIS study in Africa that focused on 600 qualified GIS professionals and resulted in 62 responses from 18 countries. Much of that low response was due to lack of telecommunication infrastructure. The USGS 2008 survey is an excellent sign that wireless technology is making some advances and allowing greater access to the internet and to geospatial data, although infrastructure is still an issue in Africa.
2009 23 Jul
The Satellites Data Use for Monitoring the Degradation Process of Natural Resources in Semi Arid Zones-Case of Southern Region of the Aurès (Algeria)
Abgelegt unter: Fernerkundung | RSS 2.0 | TB | Tags: Analysis, GIS, Remote Sensing | Keine Kommentare
Abstract: The semi-arid region of the Aurès presents an undeniable diversity of flora and fauna, however weather conditions and actual adverse anthropogenic, caused degradation of the physical environment, which have the form of a regression in the natural forest cover. The objective of this study is to determine the contribution of satellite images in detecting changes in land use and monitoring of the degradation processes in the southern part of the Aurès region. As far as that goes, we used images: Landsat ETM + for 2001 and TM 1987.These last cover the southern region of the Aurès which presents a landscape exposed to the phenomena of degradation including forest Beni-Mloul, Dj.Mezbel and Dj khaddou Ahmar, characterized by endemic species. The adopted step is to treat multi-dates satellite imagery by the method of supervised classification of Maximum likelihood to see global changes of land use that have occurred in this area.
2009 17 Jul
GIS AND REMOTE-SENSING FOR HIGH-RESOLUTION MAPPING AND DIGITAL CARTOGRAPHIC DATABASEBUILDING IN AFRICAN REMOTE AREAS
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The possibility of using high resolution satellite data on a GIS platform for fast and low-cost map upgrading and digital cartographic database-building over remote areas in Africa is demonstrated. Using just one LANDSAT TM composite image, in combination with DEM (digital elevation model) and the author’s GPS data, a series of base and derived maps (hydrography, territorial boundaries, villages location, road network, relief) was obtained in a digitized, highly accurate, updated and upgradeable GIS-friendly format for the remote Kayamba Chiefdom in Congo. From these digital layer maps, a set of quantitative cartographic metrics (coordinates, distance, length, area, slope, aspect, etc.) was reliably deduced. All these fi ndings provide a solid base for further quantitative eco-climatic analysis or land/resources management and planning for the Chiefdom. Ground truth data are determinant in defi ning and/or identifying the surface features embedded in the satellite imagery. I recommend this analysis approach for those remote areas in developing countries where a full-scale ground survey is too costly or technologically too demanding.
2009 17 Jul
Bayesian and GIS Mapping of Childhood Mortality in Rural Burkina Faso
Abgelegt unter: Allgemein, Medizin | RSS 2.0 | TB | Tags: Childhood Mortality, GIS Mapping | Keine Kommentare
Abstract
Background: Various geographic information systems (GIS) are now widely used to map the distribution of diseases and mortality. However, the mapping of raw mortality rates has been found to be inappropriate since it does not account for the spatial heterogeneity of the population at risk. Bayesian techniques have therefore been suggested as a solution to the problem. Methods: Annual mortality rates for each of the 39 villages of the study area in the Kossi Province in northwest Burkina Faso were calculated using midyear populations of children under five. Two mapping techniques were then used. Firstly, the GIS software ArcView was used to map the crude mortality rates. Secondly, the data were smoothed by the method of empirical Bayes estimation. The geostatistical prediction method of Kriging was then used to spatially interpolate the data for successive years. Results: No spatial pattern is identifiable from the circles representing mortality rates drawn on the map using ArcView. The circles are scattered over the study area and comparing annual distributions between them is difficult. The maps produced by the Bayesian technique also do not show a clear spatial trend pattern. However, they indicate the tendency of villages in the northeastern region to produce higher incidence or risk values, confirming the results of an earlier study reporting a significant cluster of high childhood mortality in the same area.
2009 17 Jul
A GIS model for determination of water resources suitability for goats grazing
Abgelegt unter: Gis Anwendungen | RSS 2.0 | TB | Tags: water resources; gis | Keine Kommentare
Proper use from water resources, especially in arid and semi arid of Iranian rangeland are very important. In this area water is one of a valuable ecosystem component. The study was conducted in Ghareh Aghach watershed region is located, Isfahan province, in central part of Iran. Four criteria’s of water quality, water quantity, water distance and livestock information were integrated to water resources suitability for goats grazing. According to the results, water distance and accessibility to water is a most declining factor for suitability. A quality and quantity factor is a no limiting factor in part of study area. The results show that from 7158.69 ha of studied rangelands, 6245.93 ha (87.25%) classified as S1 class (with no limitation), 810.58 ha (11.32%) classified as S2 class (with low limitation), and 102.3 ha (1.43%) classified as N class (non suitable). Based up on slope classes, areas that far from water point more than 75% of slope is not suitable and less than 15% are very suitable. Good distribution of water resources increases water suitability and cause better and monotonous utilization of rangeland.
2009 17 Jul
The Use of Nigeria SAT-1 and GIS in Assesin the Mineral Potential of Rafin-Gabbas, North Central Nigeria
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Abstract: This study represents a part of an ongoing research program to evaluate the lithologic mapping capabilities of NigeriaSat-1. Rafin Gabas is located in Nasarawa state and falls within the Younger Granite province of Nigeria. Wolframite and cassiterite have been found to occur within this area.The topographical map of the study area was generated from the SRTM (Shuttle Radar Topography Mission Data). The DEM was converted into a contour map using the ERDAS and ArcView softwares. The NigeriaSat-1 image of the area was subjected to various image processing techniques such as edge enhancement, Principal component analysis and filtering. Samples from wolframite-bearing-quartzite-veins were analysed and old tin mines were studied. The various ancillary data were integrated in ILWIS software. Geological information such as lithological boundaries and lineaments were derived from the NigeriaSat-1 image. The lineaments were found to occur in the NE-SW direction and they range in length from 300 Km to 2.5 Km and some cut across rock boundaries. The results of the XRF analysis show an average of 62% Wo . Tailings from the old mines were observed to 3 contain some amounts of Cassiterite which could be reworked. The various data generated were integrated in a GIS environment and a mineral probability map was produced.
2009 17 Jul
The HIVmapper
Abgelegt unter: Gis Anwendungen | RSS 2.0 | TB | Tags: GIS, HIV | Keine Kommentare
The HIVmapper is an interactive GIS mapping tool which allows users to quickly create maps based on MEASURE DHS data found in the HIV/AIDS Survey Indicators Database.
Use maps to tell stories and explain trends. For example, maps can help to describe the HIV situation in Tanzania. Below are four maps that describe HIV prevalence in Tanzania and in the region. Click on thumbnail images to see maps in HIVmapper.
2009 14 Jul
The study of urban growth impact in tourism area using remote sensing and GIS technique for north part of the UAE
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INTRODUCTION
The success of tourism in any country depends on the ability of that country to sufficiently develop, manage and market the tourism facilities and activities in that country (Briassoulis and Straaten, 1999). In the United Arab Emirates (UAE), tourism is one of the industries with the strongest effect on the economy because it helps in developing other sectors. According to statistics supplied by Department of Economic Development in the Emirate of Ras al Khaimah (RAK) (2007), tourism in the Northern part of the UAE contributes about two percent to the Gross Domestic Product (GDP) (Department of Economic Development, 2007). The tourism sector is estimated to have generated 19 billion US dollars in 2007 for the UAE (Alittihad, 2008). The UAE Government in her quest to diversify her mono-cultural economy, which is heavily dependent on petroleum export, has decided to take some measures to promote travel and tourism (Ministry of Economy, 2007). The aims of these measures to make the UAE the ultimate tourism destination in the Middle East and to make tourism one of the greatest foreign exchange earners in an oil dependent economy.
2009 14 Jul
Remote sensing and GIS applications in agrometeorology
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Remote sensing is the science and art of obtaining information about an object through the analysis of data
acquired by a device that is not in contact with the object (Lillesand and Keifer, 1994). Remotely sensed data can be of many forms, including variations in force distribution, acoustic wave distribution or electromagnetic energy distributions and can be obtained from a variety of platforms, including satellite, airplanes, remotely pilot vehicles, handheld radiometers or even bucket trucks. They may be gathered by different devices, including sensors, film camera, digital cameras, video recorders. Our eyes acquire data on variations in electromagnetic radiations. Instruments capable of measuring electromagnetic radiation are called sensors. Sensors can be differentiated in two main groups: Passive sensors: without their own source of radiation. They are sensitive only to radiation from a natural origin. Active sensors: which have a built in source of radiation. Examples are Radar (Radio detection and ranging) and Lidar (Light detection and ranging) systems.
2009 11 Jul
The soil maps of Indian
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Indian Institute of Soil Science, Bhopal
Soil Fertility Maps (Macronutrients)
Soil Fertility Maps (Micronutrients)
Since the middle of sixties the research on nutrients, water and energy leaned heavily towards applied aspects and has already paid rich dividends to Indian agriculture and Indian economy as a whole. However, if Indian agriculture is to become nationally more sound and internationally more competitive, it will have to receive greater support from basic and strategic research. In the years to come, the sustainability of soil productivity will encounter the problems associated with poor resource base, high inputs, mainly fertilizer and water, high-energy use and environmental degradation. Therefore, the future gains of enhancing food production in a sustainable manner can essentially be realized through the generation and adoption of more appropriate nutrient and water management technologies that are based on basic and sound strategic research information. In view of the fast changing scenario of Indian agriculture, and the growing importance of enhancing and sustaining productivity of soil resource, the ICAR established the Indian Institute of Soil Science in 1988 at Bhopal to conduct basic and strategic research on this aspect.
2009 11 Jul
The soil maps of Africa
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European Digital Archive of Soil Maps
“Data and information are essential building blocks of science. Many types of data, including extant historical data which have newly appreciated scientific importance for the analysis of changes over time, are not being used for research because they are not available in digital formats” (International Council for Science, 2004).
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2009 9 Jul
Laserscanning in forstwissenschaftlichen und forstwirtschaftlichen Anwendungen
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Sowohl Flugzeuglaserscanning wie auch terrestrisches Laserscanning finden seit etwa 10 Jahren ein wachsendes Interesse von Seiten der Forstwirtschaft. Die dreidimensionale Natur von Laserscannerdaten beinhaltet ein großes Potential zur Extraktion forstwirtschaftlicher oder forstwissenschaftlicher Parameter, welche durch konkurrierende Methoden nicht oder nicht hinreichend genau oder nur unter erheblichem Personalaufwand extrahiert werden können. Anwendungsbeispiele finden sich in der Forstinventur, in Forstmanagementaufgaben, in Analysen zur CO2-Speicherkapazität, in Biodiversitätsstudien und in der Habitatsuntersuchung.
2009 9 Jul
Abschätzung der Wahrscheinlichkeit einer Bewirtschaftungsaufgabe landwirtschaftlicher Parzellen mittels GIS-gestützter Modellierung (PROBAT)
Abgelegt unter: Landwirtschaft | RSS 2.0 | TB | Tags: GIS, Landwirtschaft | Keine Kommentare
Marginalisierung der Landwirtschaft, verbunden mit Bewirtschaftungsaufgaben landwirtschaftlicher Flächen und der Ausdehnung der Waldflächen, führt zu wesentlichen Änderungen der Land(wirt)schaft. Der Beitrag untersucht am Fallbeispiel zweier oberösterreichischer Katastralgemeinden (Trattenbach in Ternbeg und Prandegg in Schönau), auf der Maßstabsebene von Einzelparzellen, welche sozioökonomischen und biophysikalischen Faktoren einen Rückzug aus der agrarischen Flächenbewirtschaftung fördern. Landschafts- und Parzellencharakteristika wie Exposition und Bodenbonität spielen im Entscheidungsprozess über die künftige Flächennutzung ebenso eine hochsignifikante Rolle, wie auch sozioökonomische (Erwerbsform, Arbeitskapazitäten, Hofnachfolge, Alter, ÖPUL-Teilnahme) Faktoren. Ziel des Forschungsvorhabens war es, ein GIS-gestütztes Verfahren zu entwickeln, welches es ermöglicht, jenes Risiko abzuschätzen, mit dem Agrarflächen in Zukunft aus der agrarischen Nutzung fallen.
2009 9 Jul
Remote sensing Indian agriculture
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Introduction
In tropical countries like India with 127 different agro-climatic zones, the impact of global climate change is evidential through varied seasonal variances such as droughts in Andhra Pradesh, Orissa, Tamil Nadu and fl ooding in places like Assam, Bihar, Orissa, West Bengal, Uttar Pradesh, Andhra Pradesh, etc. Coincidentally, these are also the major agricultural states. Furthermore, the dominance of middlemen increases the extent of food insecurity. The end result is that the government has to import foodgrains from other countries. In India, we still predominantly use traditional techniques such as fi eld based crop cutting experiments (CCE) to assess the crop yield and acreage. It is worthwhile to note that in India all crop exports and import decisions are still based on historical production data (previous year’s production records), as against the growing international trend of basing these decisions on more scientific and accurate methods such as assessing the current year’s yield and acreage much in advance of the actual production by using remote sensing and GIS techniques. The ramifi cations of taking crucial export and import decisions based on historical data is that there could be a perceived shortage or surplus. To cite an example, during FY-07, there was a bumper rubber production inIndia, as compared to previous few years. Still the same was imported and the price of Indian rubber went down, all due to non availability of timely data.
2009 7 Jul
Methoden zur räumlichen Datenanalyse
Abgelegt unter: Forschung | RSS 2.0 | TB | Tags: Datenanalyse, Statistik | Keine Kommentare
Kurzfassung: Dieser Arbeitsbericht entstand im Rahmen der COST 340 Aktion „Entwicklung des Transitverkehrs-Systems und dessen Auswirkungen auf die Raumnutzung in der Schweiz.“. Er gibt einen Überblick über die am häufigsten angewendeten Methoden zur Erfassung räumlicher Statistik. Der erste Teil diskutiert 4 verschiedene multivariate Modelle, wird deren wichtigste Unterschiede herausarbeiten und die häufigstem Anwendungsbereiche aufzeigen. Ein zweiter Teil geht detailliert auf die Panel-Daten Modellierung ein. In einem dritten Teil werden sodann einige Modelle zum Beschrieb von Landnutzung- und Verkehrsentwicklung beschrieben. Schlagworte Räumliche Daten; Statistik; Schweiz; ETH Zürich; Institut für Verkehrsplanung und
Transportsysteme (IVT).
2009 6 Jul
Helping Consumers Buy Products that Reflect their Values; How Google’s Mobile…
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Tech talks at Google
2009 6 Jul
STATEWIDE CHANGE DETECTION USING MULTITEMPORAL REMOTE SENSING DATA
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INTRODUCTION
As human and natural forces modify the landscape, resource agencies find it increasingly important to monitor and assess these alterations. Changes in vegetation affect wildlife habitat, fire conditions, aesthetic and historical values and ambient air quality. These changes, in turn, influence management and policy decisions. Methods for monitoring vegetation change range from intensive field sampling with plot inventories to extensive analysis of remotely sensed data. While aerial photography can detect change over relatively small areas at reasonable cost, satellite imagery has proven more cost effective for large regions.
2009 4 Jul
Geospatial Information and Geographic Information Systems (GIS): Current Issues and Future Challenges
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Summary
Geospatial information is data referenced to a place—a set of geographic coordinates—which can often be gathered, manipulated, and displayed in real time. A Geographic Information System (GIS) is a computer system capable of capturing, storing, analyzing, and displaying geographically referenced information. In recent years consumer demand has skyrocketed for geospatial information and for tools like GIS to manipulate and display geospatial information. Global Positioning System (GPS) data and their integration with digital maps has led to the popular handheld or dashboard navigation devices used daily by millions. The federal government and policy makers increasingly use geospatial information and tools like GIS for
producing floodplain maps, conducting the Census, mapping foreclosures, and responding to natural hazards such as wildfires and hurricanes. For policy makers, this type of analysis can greatly assist in clarifying complex problems that may involve local, state, and federal government, and affect businesses, residential areas, and federal installations.
Peter Folger
Specialist in Energy and Natural Resources Policy
June 8, 2009

