# Bilinear surface smoothing for spatial interpolation with optional incorporation of an explanatory variable. Part 1: Theory

> Research article (Hydrological Sciences Journal, 2015) · cited 12× · AI/ML

**Wikidata**: [openalex:W2284865041](https://www.wikidata.org/wiki/openalex:W2284865041)  
**Source**: https://4ort.xyz/entity/bilinear-surface-smoothing-for-spatial-interpolation-with-optional-incorporation-of-an-explanatory-variable-part-1-theor