Showing papers in "Mapping Sciences & Remote Sensing in 1999"
TL;DR: In this article, the evolution of the Sefidrud River delta (Iran, Caspian Sea) is examined on the basis of field and remote sensing data (1950-1990), more specifically space photographs at scales of 1:250,000 and 1...
Abstract: The evolution of the Sefidrud River delta (Iran, Caspian Sea) is examined on the basis of field and remote sensing data (1950–1990), more specifically space photographs at scales of 1:250,000 and 1...
9 citations
TL;DR: Practical work has been done on estimating the depth of groundwater occurrence in a test area with the use of radiometric and optical remote sensing, as well as a surface databank and diagrammatic maps with isarithms depicting groundwater depths from the surface.
Abstract: Measurement methods and a data processing algorithm used in solving the problem of determining the depth of the water table by means of remote sensing and use of surface information on the hydrological and dielectric properties of soils are examined. In accordance with this approach, practical work has been done on estimating the depth of groundwater occurrence in a test area (in the vicinity of the Belovo Reservoir in Kemerovo Oblast) with the use of radiometric and optical remote sensing, as well as a surface databank. The results are presented in the form of diagrammatic maps with isarithms depicting groundwater depths from the surface.
8 citations
TL;DR: The results of work on the World Atlas of Snow and Ice Resources during the 1970s and 1980s, headed by the Institute of Geography, USSR Academy of Sciences, are examined in this paper.
Abstract: The results of work on the World Atlas of Snow and Ice Resources during the 1970s and 1980s, headed by the Institute of Geography, USSR Academy of Sciences, are examined. Information is given on the purposes, structure, and special features of the Atlas, and the role of snow and ice phenomena in the Earth's geographical shell is characterized quantitatively. Translated by Edward Torrey, Alexandria, VA from: Izvestiya Aka-demii Nauk, seriya geograficheskaya, 1998, No. 5, pp. 10-23.
3 citations
TL;DR: The experience obtained during the organization and operation of a system for the on-line reception, processing, and dissemination of satellite data covering the entire territory of Russia for the purpose of information dissemination is described in this article.
Abstract: The experience obtained during the organization and operation of a system for the on-line reception, processing, and dissemination of satellite data covering the entire territory of Russia for the ...
2 citations
TL;DR: Algorithms are written for discriminating shorelines on satellite images using halftone (edge) and boundary (contour)-point information, this being the first stage in the process of identifying lakes, rivers, etc.
Abstract: Algorithms are written for discriminating shorelines on satellite images using halftone (edge) and boundary (contour)-point information, this being the first stage in the process of identifying lakes, rivers, etc. Areas of distinctive morphometry are first discriminated on the image and this image is then broken down into regions corresponding to the features present on the image. The physical information present on satellite images also is used to select the initial points used in the performance of such a procedure.
2 citations
TL;DR: How the preparation of a series of spatial reconstructions of the past on the basis of principles of comprehensive mapping of contemporary geosystems may be used to assess the present status of landscapes from the perspective of their general evolution and assist the formulation of long-range predictions is investigated.
Abstract: The authors describe the evolution of a new field in cartography—the substantive basis of which is the preparation of a series of spatial reconstructions (climate, landscape components) of the past on the basis of principles of comprehensive mapping of contemporary geosystems. The paper investigates how such an approach may be used to assess the present status of landscapes from the perspective of their general evolution and assist in the formulation of long-range predictions. Translated by Edward Torrey, Alexandria, VA from: Izvestiya Akademii Nauk, seriya geograficheskaya, 1998, No. 5, pp. 30-43.
1 citations
TL;DR: A Russian geographer assesses past experience with (and potential applications of) the principles and methods of landscape morphometry in the remote sensing-based monitoring of geosystems.
Abstract: A Russian geographer assesses past experience with (and potential applications of) the principles and methods of landscape morphometry in the remote sensing-based monitoring of geosystems. Considerable attention is devoted to methods of calculating indices measuring the shape, nonuniformity, relative location, proximity, connectivity, and fractal dimensions of strips and patches—two basic types of forms found on remote sensing imagery. Translated by Edward Torrey, Alexandria, VA 22308 from: Geografiya i prirodnyye resursy, 1998, No. 4, pp. 97-103.
1 citations
TL;DR: In this paper, the authors describe applications of radar imagery from the ERS-2 satellite in ice-cover monitoring in regions of whelping of the harp seal in the White Sea.
Abstract: An international team of researchers describes applications of radar imagery from the ERS-2 satellite in ice-cover monitoring in regions of whelping of the harp seal in the White Sea (February-March 1997). Among parameters relevant to the ecology of the harp seal that can be determined more effectively with radar imagery are ice age and continuity, position and condition of shore-ice edge, and direction of drift of ice fields. Examples of practical use of such imagery in regions of reproduction and migration of sea mammals are presented and comparisons with aerial imagery in visible and infrared wavelengths are made.
TL;DR: In this paper, the authors used satellite imagery with a resolution of 1.1 km for estimating the extent of burned-over areas and their age, degree of forest regeneration, and possibility of dating of past fire events.
Abstract: The possibility of using NOAA satellite imagery with a resolution of 1.1 km for estimating the extent of burned-over areas and their age, degree of forest regeneration, and possibility of dating of past fire events is demonstrated. The results of classification by the maximum likelihood, minimum distance, and cluster analysis (multidimensional histograms) methods are presented.
TL;DR: In this article, the present-day status of the problem of measuring the solar constant, and the possible influence of variability of this quantity on the global climate system is discussed, and results of a search for periodicities in changes in the surface temperature of 12 cities are given in comparison with similar data for a series of Wolf numbers over an 85-year period.
Abstract: Data are presented on the present-day status of the problem of measuring the solar constant, and the possible influence of variability of this quantity on the global climate system is discussed. The results of a search for periodicities in changes in the surface temperature of 12 cities are given in comparison with similar data for a series of Wolf numbers over an 85-year period.
TL;DR: In this article, a comparative analysis is made of materials from four groups of researchers who have used space imagery to study industrial impacts on northern vegetation in the vicinity of Monchegorsk.
Abstract: A comparative analysis is made of materials from four groups of researchers—Russian, British, Norwegian, and Finnish—who have used space imagery to study industrial impacts on northern vegetation in the vicinity of Monchegorsk The problems encountered by the groups included variable survey weather conditions, the strong influence of seasonal changes, differences in the physiognomy of the vegetation, and the inapplicability of impact indicators used in one region to another
TL;DR: In this article, a universal method is proposed for assessing the physiological state and content of plant pigments on the basis of the chlorophyll potential S(t) in the red absorption band λ = 680 nm, as determined from spectral brightness coefficients.
Abstract: The results of multiyear research on the condition of agricultural crops are analyzed on the basis of data on the reflectance of plants during their growing season. A universal method is proposed for assessing the physiological state and content of plant pigments on the basis of the chlorophyll potential S(t) in the red absorption band λ = 680 nm, as determined from spectral brightness coefficients.
TL;DR: The author outlines a method for detecting change in mountain-basin geosystems based on identification of graphic images and the potential of utilizing a basin approach to analysis of the resistance of various soil/ground materials to endogenous-exogenous processes is analyzed.
Abstract: The author outlines a method for detecting change in mountain-basin geosystems based on identification of graphic images. The determination and interpretation of the quantitative indices of morphological elements of mountain basins makes it possible to define basic trends in the development of slope drainage basins. The potential of utilizing a basin approach to analysis of the resistance of various soil/ground materials to endogenous-exogenous processes is analyzed. Translated by Edward Torrey, Alexandria, Virginia from: Izvestiya Akademii Nauk, seriya geograficheskaya, 1999, No. 2, pp. 91-98.
TL;DR: Algorithms for processing multispectral scanner images are described, the results of which are not affected by additive and multiplicative components of error in brightness measurement, which are unknown but identical in all spectral channels.
Abstract: Algorithms for processing multispectral scanner images are described, the results of which are not affected by additive and multiplicative components of error in brightness measurement, which are unknown but identical in all spectral channels. A detailed description is provided of an algorithm for the joint processing of images recorded in three spectral channels, but the approach can be adapted for use in processing imagery in four, five, or more bands. Classification maps produced by the algorithm for the purpose of discrimination of water, bare or sparsely vegetated ground, and areas of denser vegetation are presented and assessed.