COMPARING THE EFFECT OF MAP SCALE IN SEPARATION GEOMORPHOLOGICAL LAND UNITS OF DESERTIFICATION HAZARD MAPPING USING GIS (CASE STUDY: HARES-ABAD’S SABZEVAR REGION)

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SILAKHORI I.; OWNEGH M.

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Journal: Journal of RS and GIS for Natural Resources Year:2012 | Volume:3 | Issue:4 Page(s): 91-105

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Title

COMPARING THE EFFECT OF MAP SCALE IN SEPARATION GEOMORPHOLOGICAL LAND UNITS OF DESERTIFICATION HAZARD MAPPING USING GIS (CASE STUDY: HARES-ABAD’S SABZEVAR REGION)

Author(s)

SILAKHORI I. | OWNEGH M. | Issue Writer Certificate

Keywords

DESERTIFICATION HAZARDQ2

WORK UNITSQ1

GEOMORPHOLOGYQ2

GEOGRAPHIC INFORMATION SYSTEM (GIS)Q2

HARES-ABADQ2

Abstract

Today, desertification is one of the major challenges for this century. For evaluation and mapping of desertification, many researchers have been conducted leading to regional and local models. The first step for implementing the model working unit is prepared. The purpose of this study was comparing the effect of map scale in preparation geomorphological units for DESERTIFICATION HAZARD mapping. For this purpose, in three scales traditional executive of Iran (1:250000, 1:100000 and 1:50000) was prepared classes of height, slop, aspect and lithology maps. And then work unit map based on GEOMORPHOLOGY obtained from them. With get bigger scale range from 1:250000 to 1:50000 map polygon’s number for all maps increased with a linear trend. And also, study range was smaller and increased in polygon diversity. For stochastic analysis between diversity of an abundance of WORK UNITS in three scales, used chip-square test. A result showed that significant are at 99% confidence level. A comparison of scale changes, showed that by 2.5 times of a scale of 1:250000 to 1:100000, five times of a scale of 1:250000 to 1:50000 and two times of a scale of 1:100000 to 1:50000, the number, frequency and percentage of area in WORK UNITS almost have changed with the same proportion. More detailed study on three unites: mountains, pediment and playa showed that the geometric and spatial disciplines increased in the mountains toward the playa. Finally, scale of 1:100000 scale was introduced as an optimal scale in the study.

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APA: Copy

SILAKHORI, I., & OWNEGH, M.. (2012). COMPARING THE EFFECT OF MAP SCALE IN SEPARATION GEOMORPHOLOGICAL LAND UNITS OF DESERTIFICATION HAZARD MAPPING USING GIS (CASE STUDY: HARES-ABAD’S SABZEVAR REGION). JOURNAL OF RS AND GIS FOR NATURAL RESOURCES (JOURNAL OF APPLIED RS AND GIS TECHNIQUES IN NATURAL RESOURCE SCIENCE), 3(4), 91-105. SID. https://sid.ir/paper/189630/en

Vancouver: Copy

SILAKHORI I., OWNEGH M.. COMPARING THE EFFECT OF MAP SCALE IN SEPARATION GEOMORPHOLOGICAL LAND UNITS OF DESERTIFICATION HAZARD MAPPING USING GIS (CASE STUDY: HARES-ABAD’S SABZEVAR REGION). JOURNAL OF RS AND GIS FOR NATURAL RESOURCES (JOURNAL OF APPLIED RS AND GIS TECHNIQUES IN NATURAL RESOURCE SCIENCE)[Internet]. 2012;3(4):91-105. Available from: https://sid.ir/paper/189630/en

IEEE: Copy

I. SILAKHORI, and M. OWNEGH, “COMPARING THE EFFECT OF MAP SCALE IN SEPARATION GEOMORPHOLOGICAL LAND UNITS OF DESERTIFICATION HAZARD MAPPING USING GIS (CASE STUDY: HARES-ABAD’S SABZEVAR REGION),” JOURNAL OF RS AND GIS FOR NATURAL RESOURCES (JOURNAL OF APPLIED RS AND GIS TECHNIQUES IN NATURAL RESOURCE SCIENCE), vol. 3, no. 4, pp. 91–105, 2012, [Online]. Available: https://sid.ir/paper/189630/en

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