Satellite detected water extents in Camarines Sur Province as of 26 October 2024

Name: Satellite detected water extents in Camarines Sur Province as of 26 October 2024
Creator: United Nations Satellite Centre (UNOSAT)
License: http://www.opendefinition.org/licenses/cc-by-sa

✦ DISCOVERED BY ORIONAIUnited Nations Satellite Centre (UNOSAT)WaterPhilippines

Philippines

About this dataset

**UNOSAT code: TC20241028PHL, GDACS ID: 1001115** This map illustrates cumulative detected water using multiple satellites in Camarines Sur Province, Bicol Region, Philippines acquired on 26 October 2024. Within the boundary of Camarines Sur Province of about 5,300 km², a total of about 280 km² of land appears to be affected by flood waters, with around 230 km² of cropland inundated. Based on Worldpop spatial demographic data, about 224,000 people are 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 the United Nations Satellite Centre (UNOSAT). Important note: Flood analysis from radar images may underestimate the presence of standing waters in built-up areas and densely vegetated areas due to the backscattering properties of the radar signal.

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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✦ Suggested by OrionAI

Satellite detected water extents in Camarines Sur Province as of 29 October 2024

**UNOSAT code: TC20241028PHL, GDACS ID: 1001115** This map illustrates a satellite-detected surface waters in Camarines Sur Province, Bicol Region, Philippines acquired on 29 October 2024 at 17:58 local time (09:58 UTC). Within the boundary of Camarines Sur Province of about 5,300 km², a total of about 130 km² of land appears to be affected by flood waters, with around 230 km² of cropland inundated. The flood extent has receded by approximately 150 km² since the previous observation on 26 October 2024. Based on Worldpop spatial demographic data, about 93,000 people are 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 the United Nations Satellite Centre (UNOSAT). Important note: Flood analysis from radar images may underestimate the presence of standing waters in built-up areas and densely vegetated areas due to the backscattering properties of the radar signal.