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The USGS National Hydrography Dataset (NHD) Downloadable Data Collection from The National Map (TNM) is a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed bodies of surface water (lakes, ponds, and reservoirs), paths through which water flows (canals, ditches, streams, and rivers), and related entities such as point features (springs, wells, stream gages, and dams). The information encoded about these features includes classification and other characteristics, delineation, geographic name, position and related measures, a "reach code" through which other information can be related to the NHD, and the direction of water flow. The network of reach codes delineating...
The Moderate Resolution Imaging Spectroradiometer, or MODIS, sensor resides aboard the Terra and Aqua platforms, offering a view the Earth's surface every 1-2 days. The MODIS sensor collects data within 36 spectral bands, ranging in wavelengths from 0.4 µm to 14.4 µm and provides us with imagery at a nominal resolution of 250 m at nadir for two bands, 500 m resolution for 5 bands, and the remaining 29 bands at 1 km. Many data products are derived from MODIS/Terra including surface reflectance, emissivity, land surface temperature, vegetation indices, thermal anomalies and fire, leaf area index, and evapotranspiration. This metadata record is intended to represent the mission as a whole and to direct consumers to...
The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is one of five state-of-the-art instrument sensor systems operating on the Terra spacecraft. The Terra satellite was launched on December 18, 1999. Terra flies in a sun-synchronous polar orbit, crossing the equator at 10:30 a.m. Eastern Standard Time (EST). ASTER utilizes a unique combination of wide spectral coverage and high spatial resolution in the visible near-infrared through shortwave infrared to the thermal infrared regions. It is a partnership between NASA, Japan's Ministry of Economy, Trade and Industry (METI), the National Institute of Advanced Industrial Science and Technology (AIST) in Japan, and Japan Space Systems (J-spacesystems)....
The Moderate Resolution Imaging Spectroradiometer, or MODIS, sensor resides aboard the Terra and Aqua platforms, offering a view the Earth's surface every 1-2 days. The MODIS sensor collects data within 36 spectral bands, ranging in wavelengths from 0.4 µm to 14.4 µm and provides us with imagery at a nominal resolution of 250 m at nadir for two bands, 500 m resolution for 5 bands, and the remaining 29 bands at 1 km. Many data products are derived from MODIS/Aqua including surface reflectance, emissivity, land surface temperature, vegetation indices, thermal anomalies and fire, leaf area index, and evapotranspiration. Aqua carries six state-of-the-art instruments in a near-polar low-Earth orbit. The six instruments...
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