Potential Informal Gathering Sites over Tanjung & Pemenang Districts, Indonesia

Name: Potential Informal Gathering Sites over Tanjung & Pemenang Districts, Indonesia
Creator: United Nations Satellite Centre (UNOSAT)
License: http://www.opendefinition.org/licenses/cc-by-sa

✦ DISCOVERED BY ORIONAIUnited Nations Satellite Centre (UNOSAT)BoundariesIndonesia

Indonesia

About this dataset

This map illustrates satellite-detected potential informal gathering sites over Tanjung and Pemenang Districts in Lombok Island, Indonesia as of 8 August 2018, subsequent to the 6.9 magnitude earthquake, that struck Lombok Island on 5 August 2018. The analysis was conducted using a post-event Pleiades satellite image acquired on 7 and 8 of August 2018. UNITAR-UNOSAT analysis identified about 170 informal gathering sites in the analysed area of Lombok Island and 6 potential gathering sites in Gili Trawangan Island. The size of these temporary gathering sites ranges from isolated tents to clusters of tents. 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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Potentially affected settlements over Tanjung and Pemenang Districts, Lombok Utara Regency, Nusa Tenggara Barat Province

This map illustrates satellite-detected potentially affected settlements over Tanjung and Pemenang Districts, in Lombok Utara Regency, as of 7 August 2018, after the 6.9 earthquake, that stroke Lombok Island on 5 August 2018. The analysis was conducted using post-event Pleiades satellite imagery acquired on 7 and 8 August 2018. UNITAR-UNOSAT analysis shows an estimation of the settlement size (Hamlet, Little village and Major village) associated to a damage level (Moderately damaged, severely damaged and Destroyed). Within the map extent 49 settlements were categorized as destroyed, 57 as severely damaged and 129 as moderately damaged. Within the analysed area, Tanjung is the most affected district and Sigar Penjalin and Sokong are its most affected desa. In Pemenang district the most affected desa is Pemenang Barat. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT.