User guide Field sampling strategies for estimating building inventories
Porter K., Z. Hu, C. Huyck, J. Bevington
This report offers procedures to estimate the area distribution of building types in a community through a combination of remote sensing, local expertise, and field observations. The resulting inventory can be used for probabilistic seismic risk analysis. The community is first divided into geographic regions (referred to here as zones) of relatively homogeneous use. These procedures show how to estimate the area distribution of building types for one zone. One estimates the total building area in each zone by remote-sensing procedures that are not discussed here, and then multiplies by the distribution estimated using the present procedures. The result is an estimate of the building area of each building type in each zone. One repeats the process for each zone in the community to create an estimate of the building area of each building type in the community. Four sampling strategies are offered for sampling a zone depending on whether (a) the zone has homogeneous building heights, (b) all important building features are visible, (c) expert advice is available on recognizing hidden features, and (d) a prior estimate from experts on building-type distribution is available.