PI Data: Multispectral and Thermal Surface Imagery and Surface Elevation Mosaics (CAMSPEC-AIR)

<p>This data set contains high-resolution image products (orthomosaics) acquired from midsized uncrewed aerial systems that&nbsp;have been processed for value-added quality. The instrument itself, a multispectral imager, the Altum by Micasense, captures six&nbsp;spectral bands (red, green blue, NIR, red edge, and LWIR/thermal1) as radiance, which is converted to reflectance. The code used to develop these images first uses tools from the Micasense Python library2 to apply dark level corrections, row gradient corrections, and radiometric corrections. Next, it uses the processing API from Agisoft Metashape software to align and mosaic the processed imagery, following the processes developed by the USGS&#39; structure from motion workflow documentation.3&nbsp;Captures at different altitudes (recorded in MSL) produce an orthomosaic, a tif image containing information related to the six&nbsp;spectral bands, and a digital elevation model (DEM), a tif image containing information related to the elevation of the surveyed terraine. Metadata included in every image can be used to extract lat, lon, and reflectance values.</p> <p>&nbsp;</p> <p>Cite as:&nbsp;Tagestad, J., Nelson, K., Goldberger, L., Gonzalez-Hirshfeld, I. PI Data: Multispectral and Thermal Surface Imagery and Surface Elevation Mosaics (CAMSPEC-AIR). (07/09/2022 &ndash; 07/18/2022) ARM Data Center [Dataset]. DOI: 10.5439/1962600. https://arm.gov/capabilities/instruments/camspec-air , 2023.</p>