Abstract
Evapotranspiration monitoring allows us to assess the environmental stress on forest and agricultural ecosystems. Nowadays, Remote Sensing and Geographical Information Systems (GIS) are the main techniques used for calculating evapotranspiration at 5 catchment and regional scales. In this study we present a methodology, based on the energy balance equation (B-method), that combines remote sensing imagery with GIS climate modelling to estimate daily evapotranspiration (ETd) for several dates between 2003 and 2005. The three main variables needed to compute ETd were obtained as follows: (i) Land surface temperature by means of the Landsat-5 TM and Landsat-7 10 ETM+ thermal band, (ii) air temperature by means of multiple regression analysis and spatial interpolation from meteorological ground stations data at satellite pass, and (iii) net radiation by means of the radiative balance.

ABSTRACT
Web-based GIS is increasingly utilized in health organizations to share and visualize georeferenced health data through the Web. In the development of a public information and disease surveillance network, issues of data publishing and user access are important concerns. The handling of data heterogeneity, lack of available data and tools, and methods of health information representation constitute continuing challenges. The purpose of this research is to address these three problems and provide new solutions for health information sharing.

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.

Ettlingen (ots)

Innovative Produkte zum effizienten Betrieb und Unterhalt von Versorgungsnetzen präsentiert die IDS GmbH auf der E-world energy & water vom 10. bis 12. Februar 2009 in Essen (Halle 2, Stand 116). Schwerpunkt sind Instandhaltungs- und Workforce-Management-Lösungen für Versorger und Industrieunternehmen sowie deren Integration in die vorhandene Systemlandschaft, wie z.B. Netzleitsystem, GIS und ERP.

IDS GmbH: Jessica Wettstein

28.01.2009 | 11:14 Uhr

All papers published in Landscape Ecology

from its origin in 1987 through 1997 are now available for free downloading as PDF files. This includes all 156 articles published prior to the journal being acquired by Kluwer Academic Publishers (KAP). The journal Landscape Ecology was established in 1987, marking the beginning of new growth and synergy within the field. The journal particularly linked the emerging North American strain of landscape ecology with the more established European traditions. The early years of the journal contained many key papers that have helped form the development of landscape ecology in many sub-areas.

Rainfall sensitivity analyses for the HSB sounder: an Amazon case study

Full terms and conditions of use: http://www.informaworld.com/terms-and-conditions-of-access.pdf This article maybe used for research, teaching and private study purposes. Any substantial or systematic reproduction, re-distribution, re-selling, loan or sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material.
© Taylor and Francis 2007

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 36, NO. 5, SEPTEMBER 1998

SEA ICE, which covers approximately 10% of the earth’s ocean surface, plays a major role in the world climate system and is an indicator of global climatic change [12]. The sea ice pack forms the interface between the ocean and atmosphere in the polar regions and mediates the exchange of heat and momentum between them.

Author Index for Remote Sensing

Remote sensing applications
Remote Sensing (RS) refers to the science of identification of earth surface features and estimation of their geo-biophysical properties using electromagnetic radiation as a medium of interaction. Spectral, spatial, temporal and polarization signatures are major characteristics of the sensor/target, which facilitate targe discrimination. Earth surface data as seen by the sensors in different wavelengths (reflected, scattered and/or emitted) is radiometrically and geometrically corrected before extraction of spectral information. RS data, with its ability for a synoptic view, repetitive coverage with calibrated sensors to detect changes, observations at different resolutions, provides a better alternative for natural resources management as compared to traditional methods. Indian Earth Observation (EO) programme has been applications-driven and national development has been its prime motivation.

Case Western Reserve University

Microscope to Macroscope- Using GIS to Understand Environmental Complexity in Disease Causation by Charles H. King, MD/ April 3, 2008 Kelvin Smith Library

Agricultural Aircraft

Sometimes the solution to a problem is in one’s own backyard. For agricultural engineer Steven J. Thomson, readily available agricultural airplanes provided a solution to the need for high-resolution images as part of remote sensing techniques for the Mississippi Delta.

GRASS GIS Seminar
GRASS: Geographic Resources Analysis Support System
Scope: Learn the use of Free Software GIS
PART I: Introduction to GRASS and QGIS
PART II: Practical examples