WMS of Predictive map of risk due to expansive clays in Spain at a scale of 1:1,000,000.

Map with the geographical distribution of the areas where similar expansivity is assumed for the clays, which have been classified into four groups: none to low, low to moderate, moderate to high and high to very high. The different mapped units have been assigned age (4 possible) and lithology (7 different types). The map also shows the surface formations without distinction.