Islamic Republic of Iran - Satellite Detected Water Extent at the South of Urmia Lake

Name: Islamic Republic of Iran - Satellite Detected Water Extent at the South of Urmia Lake
Creator: United Nations Satellite Centre (UNOSAT)
License: http://www.opendefinition.org/licenses/cc-by-sa

✦ DISCOVERED BY ORIONAIUnited Nations Satellite Centre (UNOSAT)WaterIran

Iran

About this dataset

This map illustrates the satellite-detected waters extent south of Urmia Lake in the county of Mahabad in West Azerbaijan province of Iran as observed from the Landsat-8 image acquired on 16 April 2017. Within the area of 21,000 ha covered by this map; 2,970 ha of lands appear to be potentially affected which corresponds to 13% of the analyzed area. The flooded areas appear to be mainly agricultural zones and about 8 km of roads seem to be potentially affected. Please note that some areas were cloud covered and could not be analyzed.This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT.

Documentation

UNOSAT datasets and maps are produced using a variety of methods. In general, analysts closely review satellite imagery, often comparing two or more images together, and determine notable changes between the images. For damage assessments, refugee or IDP assessments, and similar analyses, these changes are then manually documented in the vector data by the analyst. For flood extractions, landcover mapping and similar analyses, a variety of automated remote sensing techniques are used to extract the relevant information which is then reviewed and revised as necessary by the analyst. In all cases, resulting data is then loaded into a standardized UNOSAT geodatabase and exported asshapefiles for dissemination. This is a preliminary assessment and has not yet been validated in the field. It is important to consider the characteristics of the source imagery used in the analyses when interpreting results. For damage assessments it should be noted that only significant damage to the structural integrity of the buildings analyzed can be seen in imagery, while minor damage such as cracks or holes may not be visible at all. For flood extractions using radar data it is important to note that urban areas and highly vegetated areas may mask the flood signature and result in underestimation of flood waters. Users with specific questions or concerns should contact unosat@unitar.org to seek clarification.

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Satellite-detected waters extents over Konarak, Sistan and Baluchestan Province, I. R. of Iran

**UNOSAT code: FL20200324IRN** This map illustrates satellite-detected water surface in Konarak County, Sistan and Baluchestan Province, Islamic Republic of Iran, as observed from Sentinel-2 imagery acquired on 23 March 2020. Within the analysed area of about 1,100 km2, a total of 56 km2 of land appear to be flooded in Konarak County. Based on Worldpop population data and the detected surface waters, about 3,700 people are potentially exposed or living close to flooded areas. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT.