 The development of a lightweight, unmanned airborne vehicle, UAV, with a tunable Fabry-Perot interferometer-based, FPI spectral camera allows for the collection of spectrometric image blocks with stereoscopic overlaps using lightweight UAV platforms. This new technology opens up possibilities for measuring and monitoring the environment, which is becoming increasingly important for many environmental challenges. The processing chain from raw images to geo-referenced reflectance images, digital surface models, and biomass estimates was developed in integrated photogrammetric and quantitative remote sensing approaches. An empirical assessment using FPI spectral imagery collected at an agricultural wheat test site, in the summer of 2012 showed promising results for biomass estimation when the spectral data was used, and appropriate radiometric correction was applied to the data, indicating great potential for precision agriculture and possible future research topics. This article was authored by Jussi McKinnon, Paula Licky, Temuha Kalla, and others. We are article.tv, links in the description below.