UNOSAT Gaza Governorate Damage Assessment Update

✦ DISCOVERED BY ORIONAIUnited Nations Satellite Centre (UNOSAT)Buildings and infrastructureOccupied Palestinian Territory
Occupied Palestinian Territory

About this dataset

**UNOSAT code CE20231007PS** UNOSAT's satellite-detected damage and destruction to buildings within the area of interest in the Gaza Governorate, Gaza Strip, based on an image collected on 15 October 2023 compared to an image collected on 10 October 2023 (partially clouded), and 10 May 2023 shows a total of 533 destroyed structures, 640 severely damaged structures, and 1273 moderately damaged structures, for a total of 2246 affected buildings as of 15 October 2023. The most affected area appears to be the one south of Ash Shuja'iyeh neighborhood (inset 1), with clouds covered on the 10 October 2023 image. Among the new affected structures, UNOSAT identified two school compounds, namely the Elnoor W Alaml School, moderately affected, and the Islamic University of Gaza, previously cloud-covered and now severely damaged. Additionally, UNOSAT identified 45 affected road sections, either by impact craters or by debris. This is a preliminary analysis and has not yet been validated in the field.

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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