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Geometric resolution refers to the satellite sensor's ability to effectively image a portion of the Earth's surface in a single pixel and is typically expressed in terms of ground sample distance (GSD). GSD is a term containing the overall optical and systemic noise sources and is useful for comparing how well one sensor can "see" an object on the ground within a single pixel.
- Change Detection
- Image Classification
- Risk Assessment
- Agriculture
- Natural Resource Management
- Coastal and Marine
- Urban Geography
- Emergency Management and Response
The polar regions consist of extreme geography and climate, have complex ecosystems, and experience change like nowhere else in the world. PGC maps these remote places and recently produced a high-resolution, high-quality, digital elevation model of the Arctic using optical stereo imagery. PGC’s ArcticDEM is a response to the high demand for accura...
A frequently-used method for information extraction from remote sensing data is to match information classes of to spectral ranges (or a combination of spectral ranges). Land cover and land use maps, such as those classifying mangroves from SPOT and TerraSAR-X imagery in the Mekong Delta, provide a greater understanding of environments and their pr...
Initiatives like the Mapping Malaria Risk in Africaproject (MARA/ARMA) have produced maps of climate suitability for Malaria transmission by characterizing the conditions of the disease necessary for transmission and correlating them with key climatic variables observed from remotely sensed imagery.
High spatial resolution, false color composites acquired from TTAMRSS (a multispectral, airborne remote sensing system) helped farmers and agricultural consultants in Texas plan different crop and yield management practices.
AVHRR, MODIS, and SPOT sensors quantitatively measure, for one, the gain and loss of our global forests. From this data, scientists gauge forest stand areas and estimate valuable forest resources like wood, food, medicine, and absorption of carbon dioxide.
Sea shelf ecosystems help control our climate and supply food. The National Oceanography Centre (NOC) measured phytoplankton, the microscopic marine plants at the heart of the marine food chain, as a key indicator of the productivity of an ocean area all from space.
The conflict in Syria is characterized by violations of human rights and defiance of international law. The Syrian government has demolished neighborhoods suspected of supporting opposition forces. Scientists used Landsat imagery and its historical archive to monitor and document the destruction of conflict-affected urban environments. Source: A. M...
Online communities such as OpenStreetMap, Tomnod, CrisisMappers, Virtual Disaster Viewer, and Google MapMaker are utilizing remotely-sensed imagery to provide support in disaster preparedness and emergency response.
Jun 30, 2021 · Each satellite will be produced with a specific task in mind (or multiple tasks). Image Processing Due to the size of the Earth, the nature of imaging sensors, and the pure volume of images that need to be taken, image processing is required to make useful images. One example is image stitching.
Mar 31, 2023 · Visible Imagery. Visible imagery shows the landscape and atmosphere in the visible spectrum with a wavelength of 0.4-0.7 microns (µm). The satellites can only capture the earth features during the day by using this spectrum. It is easy to observe snow cover, cloud cover, fog and water bodies in visible images.
- USGS Earth Explorer. Unlock the power of the USGS Earth Explorer because it’s not just for the United States. No matter where you live, the USGS Earth Explorer offers the latest satellite view like
- Sentinel Copernicus Browser. Sentinel-2 is the start of a new and exciting era in open and free satellite imagery. It’s not just because coverage spans the entire globe.
- NASA Earthdata Search. There’s a lot to like about NASA’s Earthdata Search, specifically for Earth science data discovery. Especially, the choices of satellite imagery are incredible.
- NOAA Data Access Viewer. NOAA replaced its aerial photography ordering system with the NOAA Data Access Viewer. Now, it’s where you discover authoritative datasets along the coasts.
Oct 10, 2023 · Satellite imagery refers to the process of capturing visual data of the Earth's surface from satellites orbiting our planet. These satellites are equipped with specialised cameras and sensors that capture high-resolution images of the Earth's surface, which are then transmitted back to Earth for analysis. The images can range from panchromatic ...
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NASA high-definition satellite images. Updated every day since the year 2000.
