Attachments
Map Information
A violent earthquake with a magnitude of 7.9M, 10Km depth has hit central Nepal at 6.11 UTC on the 25th of April. The epicenter is located between the capital city Kathmandu and the city of Pokhara, and the tremor was felt also in several city in the northern parts of India. Several aftershocks as strong as M7.1 were also recorded. Extensive damage to buildings and injuries have been reported. The core users of the map are Humanitarian Aid Operators. The potential additional users of the map are Civil Protection authorities involved in in-field operations.
The scope of the map production is planning and support to logistics.
Map Production
The present map shows basic topographic features such as transportation, hydrology and settlements in the area of Gumda(NEPAL). These basic topographic features are derived from public datasets, refined by means of visual interpretation of pre-event image.
All satellite images have been radiometrically enhanced and orthocorrected with RPC approach (using SRTM elevation data).
The estimated geometric accuracy of this product is 5 m CE90 or better, from native positional accuracy of the background satellite image.
The estimated thematic accuracy of this product is 85% or better, as it is based on visual interpretation of recognizable items on very high resolution optical imagery. Shadowed areas are zones of lower interpretation accuracy due to the poorer image radiometry. Only the area enclosed by the Area of Interest has been analyzed.