Landslide damage assessment in the Lagaip/Pogera District, Enga Province as of 27 May 2024

Name: Landslide damage assessment in the Lagaip/Pogera District, Enga Province as of 27 May 2024
Creator: United Nations Satellite Centre (UNOSAT)
License: http://www.opendefinition.org/licenses/cc-by-sa

✦ DISCOVERED BY ORIONAIUnited Nations Satellite Centre (UNOSAT)GeosciencePapua New Guinea

Papua New Guinea

About this dataset

**UNOSAT code: LS20240525PNG, GDACS ID: 1102646** This map illustrates the extent of satellite-detected landslide scars and related damage in the Lagaip/Pogera District of Enga Province in Papua New Guinea, using GeoEye-1 satellite imagery acquired on May 27, 2024, at 10:42 LT, 2 km west of Mulitaka. A massive landslide and rockfalls have affected the area. Within a 2 km radius, 634 pre-event structures have been identified (OpenStreetMap), of which at least 18 structures have been identified as damaged and/or destroyed. Using WorldPop spatial demographic datasets, it is estimated that at least 2,000 people live within a 2 km radius of the main damaged road. The main landslide scar covers approximately 9 hectares and has also blocked the Laiagam-Porgera road. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (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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Preliminary satellite-derived landslide impact assessment

**UNOSAT code: LS20240525PNG, GDACS ID: 1102646** Status: Damaged structures observed Further action(s): Continue monitoring Damaged structures, roads and landslide area observed in Lagaip/Pogera District, Enga Province, Papua New Guinea as of 24 May 2024.