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24 results for “high-resolution imagery”
High-Resolution UAV Imagery and Ground Truth Tree Data of Deciduous Forests in Fruška gora National Park, Serbia
<p><strong>Study Area</strong><br>The imagery covers a section of the <strong>Fruška Gora National Park</strong> in Serbia. More than 90% of the area is covered by deciduous forests at elevations above 300 m. The forest primarily comprises mixed stands with the following dominant species: <strong><em>Quercus petraea</em>, <em>Tilia </em>spp., <em>Carpinus betulus</em> </strong>and<strong> <em>Fagus sylvatica</em></strong>.<br>The park's highest peak is 539 meters above sea level. More than 80% of the forest is of coppice origin, and it is a <strong>managed forest</strong>. The imagery captures forest stands of varying ages, from very young to old-growth stands. Ground truth data focuses on stands more than 70 years old.</p> <p><strong>Data Collection Overview</strong><br><strong>1. RGB Imagery</strong></p> <ul> <li><strong>Equipment</strong>: High-resolution RGB images were captured using a <strong>Sony UMC-R10C camera</strong> mounted on a <strong>Quantum Systems Trinity F90+ UAV</strong>.</li> <li><strong>Altitude</strong>: 134 meters.</li> <li><strong>Ground Sampling Distance (GSD)</strong>: 4.13 cm/pix.</li> <li><strong>Coordinate System:</strong> Processed in <strong>EPSG:32634</strong> (WGS 84 / UTM zone 34N).</li> </ul> <p><strong>2. Multispectral (MS) Imagery</strong></p> <ul> <li><strong>Equipment</strong>: Multispectral data captured with a <strong>Dual MicaSense Camera</strong>, covering <strong>10 spectral bands</strong> spanning visible, red-edge, and near-infrared regions.</li> <li><strong>Altitude</strong>: 135 meters.</li> <li><strong>Ground Sampling Distance (GSD)</strong>: 9.35 cm/pix.</li> <li><strong>Coordinate System:</strong> Processed in <strong>EPSG:4326 </strong>(WGS 84)<strong>.</strong></li> </ul> <p><strong>3. Ground Truth Tree Data</strong></p> <ul> <li><strong>Sampling Methodology</strong>: Data was collected along transects representing monodominant or mixed forest<span> stands</span>, focusing on <em><strong>Quercus petraea</strong></em>, <em><strong>Fagus sylvatica</strong></em>, and <strong><em>Tilia </em>spp.</strong></li> <li><strong>Tree Count</strong>: Approximately <strong>120 trees</strong> were geolocated and measured.</li> </ul> <p><strong>Measurement Tools and Procedures</strong>:</p> <ul> <li><strong>Geographic Coordinates</strong>: Recorded with a <strong>Garmin eTrex 20 GPS</strong> and manually corrected using RGB aerial imagery for improved precision.</li> <li><strong>Tree Crowns</strong>: Delineated manually in <strong>QGIS 3.38.3</strong> using RGB imagery.</li> <li><strong>Tree Diameter</strong>: Measured at <strong>breast height (1.3m)</strong> using a diameter tape.</li> <li><strong>Tree Height</strong>: Measured using a <strong>Haglöf EC II-D electronic clinometer</strong>.</li> </ul> <p><strong>Tree Attributes Recorded</strong>:</p> <ul> <li><span>Species latin name</span>.</li> <li>Diameter at breast height (DBH).</li> <li>Tree height (H).</li> <li>Geographic coordinates (center of the tree crown).</li> <li>Elevation.</li> </ul> <p><strong>Temporal Coverage</strong></p> <ul> <li>Field data collection occurred during <strong>autumn 2024</strong>.</li> </ul>
High-Resolution QuickBird Imagery and Related GIS Layers for Barrow, Alaska, USA, Version 1
This data set contains high-resolution QuickBird imagery and geospatial data for the entire Barrow QuickBird image area (156.15° W - 157.07° W, 71.15° N - 71.41° N) and Barrow B4 Quadrangle (156.29° W - 156.89° W, 71.25° N - 71.40° N), for use in Geographic Information Systems (GIS) and remote sensing software. The original QuickBird data sets were acquired by DigitalGlobe from 1 to 2 August 2002, and consist of orthorectified satellite imagery. Federal Geographic Data Committee (FGDC)-compliant metadata for all value-added data sets are provided in text, HTML, and XML formats. Accessory layers include: 1:250,000- and 1:63,360-scale USGS Digital Raster Graphic (DRG) mosaic images (GeoTIFF format); 1:250,000- and 1:63,360-scale USGS quadrangle index maps (ESRI Shapefile format); an index map for the 62 QuickBird tiles (ESRI Shapefile format); and a simple polygon layer of the extent of the Barrow QuickBird image area and the Barrow B4 quadrangle area (ESRI Shapefile format). Unmodified QuickBird data comprise 62 data tiles in Universal Transverse Mercator (UTM) Zone 4 in GeoTIFF format. Standard release files describing the QuickBird data are included, along with the DigitalGlobe license agreement and product handbooks. The baseline geospatial data support education, outreach, and multi-disciplinary research of environmental change in Barrow, which is an area of focused scientific interest. Data are provided on four DVDs. This product is available only to investigators funded specifically from the National Science Foundation (NSF), Office of Polar Programs (OPP), Arctic Sciences Section. An NSF OPP award number must be provided when ordering this data.
High-Resolution Radar Imagery, Digital Elevation Models, and Related GIS Layers for Barrow, Alaska, USA, Version 1
This product set contains high-resolution Interferometric Synthetic Aperture Radar (IFSAR) imagery and geospatial data for the Barrow Peninsula (155.39 - 157.48 deg W, 70.86 - 71.47 deg N) and Barrow Triangle (156.13 - 157.08 deg W, 71.14 - 71.42 deg N), for use in Geographic Information Systems (GIS) and remote sensing software. The primary IFSAR data sets were acquired by Intermap Technologies from 27 to 29 July 2002, and consist of Orthorectified Radar Imagery (ORRI), a Digital Surface Model (DSM), and a Digital Terrain Model (DTM). Derived data layers include aspect, shaded relief, and slope-angle grids (floating-point binary and ArcInfo grid format), as well as a vector layer of contour lines (ESRI Shapefile format). Also available are accessory layers compiled from other sources: 1:250,000- and 1:63,360-scale USGS Digital Raster Graphic (DRG) mosaic images (GeoTIFF format); 1:250,000- and 1:63,360-scale USGS quadrangle index maps (ESRI Shapefile format); a quarter-quadrangle index map for the 26 IFSAR tiles (ESRI Shapefile format); and a simple polygon layer of the extent of the Barrow Peninsula (ESRI Shapefile format). Unmodified IFSAR data comprise 26 data tiles across UTM zones 4 and 5. The DSM and DTM tiles (5 m resolution) are provided in floating-point binary format with header and projection files. The ORRI tiles (1.25 m resolution) are available in GeoTIFF format. FGDC-compliant metadata for all data sets are provided in text, HTML, and XML formats, along with the Intermap License Agreement and product handbook. The baseline geospatial data support education, outreach, and multi-disciplinary research of environmental change in Barrow, which is an area of focused scientific interest. Data are provided on five DVDs, available through licensing only to National Science Foundation (NSF)-funded investigators. An NSF award number must be provided when ordering data.
Data used in manuscript "High-resolution snowline delineation from Landsat imagery to infer snow cover controls in a Himalayan catchment".
<p>This directory contains the following datasets (all of which are further described in the manuscript):</p> <ol> <li>Snowline points (SLPs) derived from 194 Landsat scenes using NDSI (binary) image clarification for the upper Langtang Valley.</li> <li>Validation data:<em> </em>manually delineated SLPs from 3 No. high-resolution orthoimages (CartoSat-1 and ALOS), and unspectral unmixing fSCA products derived from 3 No. Landsat scenes.</li> <li>Gridded data with daily clear-sky global irradiance for the upper Langtang Valley.</li> <li>Precipitation and temperature data:<em> </em>summary tables of precipitation and temperature in Kyanjing for the period 1999-2013, and precipitation gradients per sub-catchment.</li> </ol>
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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