Average Date When Lilacs Bloom in Idaho

This digital data set was created for use in the Idaho GAP Analysis Project I because it was supposed to be highly correlated to solar radiation and at the time was the best surrogate of heat to use for potential reptile distribution. It was used as a substitute for temperature which could not be found at the time. Every isoline on the orginal hardcopy map was not digitized because only a subset of them were needed for GAP. No responsibility is assumed by the Idaho Geospatial Data Clearinghouse or the Idaho Department of Fish and Game, or the Landscape Dynamics Lab in the use of these data.