Scientometric Mapping of Remote Sensing Research Output: A Global Perspective

Article excerpt

Introduction

Remote Sensing can be used to collect data, unlike other techniques, such as thematic cartography, geographic information systems, or statistics that must rely on data that are already available. The data collected through remote sensing can be transformed into information using analog or digital image processing techniques if appropriate logic and methods are used.

Remote sensing can be used for monitoring several natural (e.g., watershed runoff) and cultural processes (e.g., land use conversion at the urban fringe). In fact, for successful execution of many models that rely on spatially distributed information, remote sensing is essential.

Satellite Remote Sensing is an important application of remote sensing in the field of oceanography. It involves gathering information about the earth's surface using satellites orbiting around the earth and rapid method of acquiring up-to-date information over a large geographical area.

Scientometric analysis is a technique to analyse the scientific publication in particular field of science at global level, performance of a country, performance of institutions and individual scientist.

Objectives

The aim of this paper is to compare the number of journal publications and measure the quality of research by various countries and institutions, under the following categories:

* Year wise publication

* Document type wise Distribution

* Language distribution of the literature

* Geographical distribution

* Institution distribution of contributors

* Authorship pattern

* Most productive authors

Materials and Methods

Data was collected from the Science Citation Index (SCI) is available via the Web of Science (WoS). The SCI is developed by Thomson Reuters, through which the world's leading basic and applied technical research journals in many areas of science and technology, including the biomedical research literature can be accessed. For this study, total of 1188 records and 30654 citations have been received by using the Histcite software for analyzing.

Year-wise Growth of Publications

Figure 1 show that 1188 articles have been published, which have received 30,654 citations, from 1975 to Feb 2010. However, the number of published papers dropped slightly from 44 to 31 in 1997, from 65 to 52 in 2001 and from 81 to 74 in 2005. In the volumes of 1978, 1979, 1986 and 1989, there is no publications. In 2009, total publications were 119. The average number of publication per year was 38.07.

Figure 1: Year Wise Publicatin (1970-FEB 2010)

Publication Year  Count  Perrcent

1975                  1       0.1

1976                  2       0.2

1977                  1       0.1

1978                  0       0.0

1979                  0       0.0

1980                  1       0.1

1981                  2       0.2

1982                  2       0.2

1983                  2       0.2

1984                  3       0.3

1985                  1       0.1

1986                  0       0.0

1987                  4       0.3

1988                  1       0.1

1989                  0       0.0

1990                  4       0.3

1991                 34       2.9

1992                 33       7.3

1993                 25       2.1

1994                 28       2.4

1995                 37       3.1

1996                 44       3.7

1997                 31       2.6

1998                 46       3.9

1999                 54       4.5

2000                 65       5.5

2001                 52       4.4

2002                 78       6.6

2003                 79       6.6

2004                 81       6.8

2005                 74       6.2

2006                 76       6.4

2007                101       8.5

2008                 96       8.1

2009                119      10.0

2010                 11       0.9

Note: Table made from bar graph. …