Bitemporal study of vegetation in the Central-Eastern Plains of Venezuela.

Authors

DOI:

https://doi.org/10.62876/tekhn.v27i2.6566

Keywords:

Vegetation, Landsat images, multitemporal analisys, change detection, multispectral classification

Abstract

Through spatial analysis of multispectral satellite images, the qualitative and quantitative changes that occurred between April 1990 and January 2003 were studied in the vegetation cover of a sector of the Central-Eastern Plains (52,111 ha) in the southwest of the Anzoátegui state. The selection, processing, and analysis of archival or acquired images; the production and verification of vegetation image maps at very detailed scales; and the collection and interpretation of ecological information extracted from products derived from these maps were carried out in a multidisciplinary manner.

Multi-temporal classification techniques were used using medium-resolution satellite images (Landsat), establishing April 1990 as a baseline and comparing it with the situation in January 2003. Thus, changes in vegetation between the two dates were detected and quantified. Additionally, high-resolution satellite imagery (Ikonos) was used to validate significant areas of the January 2003 image, enabling the production of detailed maps of the current infrastructure. The field inspection included a helicopter flight to visually verify the result of the supervised classification and obtain a georeferenced photographic record of the areas that were of special interest for verification.

Keywords: Vegetation, Landsat images, multitemporal analysis, change detection, multispectral classification

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Author Biographies

Julián A. García, Cartogeo

Geodetic Engineer, with experience in areas related to Geomatics such as; Geographic Information Systems, Geodesy, Photogrammetry, Cartography, Topography, GPS, and Remote Sensing applied to agriculture, oil industries, environmental impact and natural resource management. Co-founder of Cartogeo, a consulting company that offers products and services in the areas of geodesy, GIS, Cartography and Remote Sensing.

Víctor M. Vilachá, Cartogeo

Geodetic Engineer, with more than 40 years of experience carrying out and managing projects for the generation, conversion and updating of cartographic information, as well as the acquisition, processing and analysis of remote sensing images from optical and radar sensors on satellite and aerial platforms. Professor of GIS, Cartography and Photogrammetry at the Central University of Venezuela and at the Simón Bolívar University. Co-founder of Cartogeo, a consulting company that offers products and services in the areas of geodesy, GIS, Cartography and Remote Sensing.

Gustavo Montes Urdaneta

Gustavo Montes Urdaneta, Barquisimeto, 4/9/1946 - Caracas, 07/24/2020, biologist (UCV, 1971), PhD (Kings College, 1976), was a lecturer and researcher of recognized prestige at universities and research centers such as the UCV, USB, IVIC, UNEG, UNEFA, DIGECAFA, where he practiced his expertise in plant physiology and ecology. He also stood out as a pioneer in environmental impact studies, as well as in vegetation monitoring, remote sensing, thematic cartography and spatial analysis mediated by Geographic Information Systems (GIS). He was a founding partner and director of the consulting company Tecnologías y Servicios Ambientales GEOCLEAN, C.A., until it ceased operations in 2010.

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Published

09/13/2024

How to Cite

Martinez Moreno, E., García, J. A. ., Vilachá, V. M., & Montes Urdaneta, G. (2024). Bitemporal study of vegetation in the Central-Eastern Plains of Venezuela. Tekhné, 27(2), 81–100. https://doi.org/10.62876/tekhn.v27i2.6566

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Vol. 27 No. 2 (2024)

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