Fayl:Dasht-e Kavir.jpg

(5.822 × 5.820 piksel, fayl həcmi: 3,5 MB, MIME növü: image/jpeg)

Xülasə

İzah
English: A satellite picture of the Dasht-e Kavir desert in Iran.

The patterns you see are formed by different geological layers that have been eroded over thousands of years by wind and sometimes (but not often) rain.

The patterns are formed from either horizontal geological layers cut through by topographic changes, or geological formations (folds, domes, etc) in relatively flat terrain.

Most of the colours are due to chemical differences in the rocks, whilst the intense blue colours could be due to a range of materials, possibly salt deposits, possibly vegetation, depending on which area of the EM spectrum is represented by blue. I suspect (but don't know, the satellite bands to displayed colours are not mentioned) that the blue colours are salt deposits, but they could equally be other materials too. To be certain, knowledge of the bands to display colours is essential.

The black line running horizontally across the image is a sensor drop-out and the data for that line or lines has been irrevocably lost. The linear (but not straight) line running vertically down the middle left is a road.

USGS/NASA description: The Dasht-e Kevir, or Great Salt Desert, is the largest desert in Iran. It is primarily uninhabited wasteland, composed of mud and salt marshes covered with crusts of salt that protect the meager moisture from completely evaporating. This image was acquired by Landsat 7’s Enhanced Thematic Mapper plus (ETM+) sensor on October 24, 2000. This is a false-color composite image made using infrared, green, and red wavelengths. The image has also been sharpened using the sensor’s panchromatic band.
فارسی: تصویر ماهواره‌ای از دشت کویر ایران. اکثر رنگ‌های موجود در نگاره و تفاوت‌های شیدهای مختلف، به دلایل اختلاف‌های ترکیبات شیمیایی مواد تشکیل دهنده صخره‌ها و تپه‌ها است که در کنار یکدیگر جلوه‌گر شده‌اند. رنگ‌های تند آبی احتمالاً ناشی از رسوب نمک‌های باقی مانده از رستنی‌ها و گیاهان کویری است. البته این استنتاج بستگی مستقیم به طیف الکترومغناطیسی دارد که با رنگ آبی نمایش داده شده‌است.
Tarix
Mənbə
Müəllif USGS EROS Data Center Satellite Systems Branch.
Object location  Kartographer map based on OpenStreetMap. View this and other nearby images on: info

(centre of image)

Lisenziya

Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, or .)
Warnings:
Public domain
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see .

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Captions

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False-color composite image of Dash-t Kevir desert in Iran, photographed by satellite.

Items portrayed in this file

təsvir edir

Dəşti-Kəbir

yaranma tarixi

24 oktyabr 2000

coordinates of depicted place ingilis

34°45'18.821"N, 54°51'45.101"E

media type ingilis

image/jpeg

checksum ingilis

087cd18e62e639c714403ee31bf3601c8ba9e589

təyinetmə üsulu: SHA-1

data size ingilis

3.666.141 Bayt

hündürlüyü/boyu

5.820 piksel

eni

5.822 piksel

Faylın tarixçəsi

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Tarix/Vaxt Miniatür Ölçülər İstifadəçi Şərh
hal-hazırkı 5.822 × 5.820 (3,5 MB) ran it through jpegtran to output optimized, non-progressive jpeg
5.822 × 5.820 (3,66 MB) Dasht-e Kavir desert in Iran

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