NASA Disasters PORTAL

Stories of Impact

More Stories of Impact

Community recovery efforts in Mayfield after disaster, showing rebuilding in progress

When Every Dollar Counts

Estimating Loss to Speed Recovery

Data Visualization

Two side-by-side maps of the Los Angeles basin from the GAIA dataset. The left map shows total built-up area per 100-meter grid cell, densest through the urban core. The right map shows only low-rise, wood-framed structures, which are sparser and more evenly spread across the suburbs. A legend gives the eight built-up area classes, from under 25,000 to over 450,000 square meters. — The Global Assessment of Infrastructure Assets (GAIA) is a worldwide gridded building exposure dataset suitable for natural hazard risk analysis. The dataset provides a gridded representation of built-up areas worldwide in square meters. At each pixel, the value is a modeled value that represents total built-up area for the grid cell. It does not represent actual buildings in the grid cell. The left image is the total built-up area which aggregates all construction types, durability types, and height categories per grid cell. The right image shows the amount of low-rise (1-3 story), wood-framed structures per grid cell. Each 100x100 meter grid cell represents the total area in square meters.

Resources & Learning

More Resources and Learning

False-color satellite imagery of a city and surrounding terrain, as displayed in the Custom Visualization Tool

PORTAL 101

A page-by-page guide to the NASA Disasters PORTAL

GAIA gridded building exposure across the Los Angeles basin, where color shows modeled built-up area per 100-meter grid cell, from dark blue in the lowest range to orange and red in the densest urban core

Understanding EO-based Building Exposure Data

NISAR satellite orbiting Earth

Fundamentals of Remote Sensing

HydroSAR flood mapping over Memphis, Tennessee

An Introduction to SAR and its Applications