Ankara Hyperspectral Image Archive Description:This is a small benchmark hyperspectral image archive that has been published for research purposes. The archive consists of 216 hyperspectral image tiles obtained by fragmenting a hyperspectral image acquired by EO-1 Hyperion sensor over surroundings of Ankara, Turkey. Each image tile has been annotated with multiple land-cover class labels (see Table 1) and with a land-use category label (see Table 2). In order to annotate each patch with appropriate land-cover class labels, very high resolution (VHR) satellite images were used. To this end, fingerprint of each hyperspectral image patch has been projected on VHR images acquired on July 27, 2016. The error rate of the annotation process was minimized due to small difference between acquisition dates of the hyperspectral and VHR images. It is worth noting that land-cover classes associated to the similar type of materials (e.g., Crop Type-A, B and C) were identified by visual inspection by comparing the spectral signatures of homogenous regions. Hyperspectral Image Size: 3402x252 pixels Number of Image Patches: 216 Image Patch Size: 63x63 pixels Imaging Spectrometer: EO-1 Hyperion Number of Spectral Channels: 119 (after removal of spectral channels those have very low Signal-to-Noise ratio and unrecoverable stripes caused by sensor defects) Ground Resolution: 30 m Date of Acquisition: August 2015 Location: Ankara, Turkey Raw Image Product: Level-1-Radiance (L1R) Table-1. Number of Images Annotated with Each Land-Cover Class in the Ankara Hyperspectral Benchmark Archive Land-Cover Class Number of Image Patches Land-Cover Class Number of Images Grass Covered Soil 215 Blue Roofing 25 Bare Soil 216 Yellow Roofing 13 Arid Soil 10 Membrane Roofing 57 Rocky 31 Concrete Roofing 55 Tree 174 White Tent 6 Reeds 5 Unpaved Road 106 Crop (Type-A) 47 Asphalt Pavement 183 Crop (Type-B) 38 Highway Pavement 12 Crop (Type-C) 2 Grass (Type-A) 215 Crop (Type-D) 55 Grass (Type-B) 12 Crop (Type-E) 4 Grass (Type-C) 25 Red Roofing 131 Lake 11 Metal Roofing 130 Pool 23 White Roofing 122 Cloud 6 Green Roofing 41 Table-2. Number of Images Annotated with Each Land-Use Category in the Ankara Hyperspectral Benchmark Archive. Land-Use Category Number of Images Rural Area 43 Urban Area 37 Cultivated Land 126 Forest 10 Please cite the following paper when publishing results that use this archive: Ömrüuzun, B. Demir, L. Bruzzone and Y. Y. Çetin, "Content based hyperspectral image retrieval using bag of endmembers image descriptors," 2016 8th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS), Los Angeles, CA, 2016, pp. 1-4. Contact: Fatih Ömrüuzun Information Systems Department Graduate School of Informatics, Middle East Technical University E-mail: omruuzun@metu.edu.tr / f.omruuzun@ieee.org