![]() ![]() As of 2021, Landsat 9 continues to provide us with datasets that have proven very useful today.Īll the free options below offer different spatial resolutions for satellite or aerial imagery, depending on its use case. This information allows land managers and local leaders to make more informed, helpful environment-related decisions. They are responsible for collecting constant high-quality land surface images of Earth to track and better understand global resource management. In partnership with NASA, there's a program known as Landsat Missions, special Earth Observation satellites. Geological Survey (USGS) allows us to view real-time satellite imagery of current conditions. To keep track of other severe weather events, such as earthquakes, landslides, and wildfires, the U.S. These technologies are used to save lives and inform us before a storm approaches land, often over a week in advance. ![]() ![]() If you live in an area prone to hurricanes, you've heard your local TV news metrologist give updates from the NOAA's National Hurricane Center (NHC) as their official source. The National Oceanic and Atmospheric Administration (NOAA) is a dedicated government agency that provides daily weather forecasts and near real-time information on weather events. Visit their website and look for an FAQ section to see how frequently they update their satellite images.Īs hurricanes have continued to ramp up due to various climate changes, how we track them also improves with time. Public and commercial services update their imagery database once every few days, but it differs from company to company. The update frequency for these satellite images can vary depending on their original source. Commercial services go beyond that, with many offering 15 cm and up for the highest resolution sensors. Public satellite image services may be limited to a maximum spatial resolution of 26 cm to 30 cm, which is plenty for personal use. We cover a variety of choices a little later on. Many free services offer satellite image quality in meters, while the premium paid services provide higher resolution options in centimeters. To get the best possible satellite image experience, look for a service that uses centimeters for its spatial resolution. ![]() Since meters are much larger than centimeters, you can expect these images to be less detailed, especially regarding buildings or landmarks. As such, this explains why you may notice some differences in certain situations.ĭepending on the type of satellite image service, some only offer lower-resolution images using meters instead of centimeters. It also states that these images are often taken at different times of day under various weather and lighting conditions. Google's combined effort with these third-party contributions makes Google Maps and Google Earth possible on such a large scale. It mentions that this data is a team effort consisting of various entities, including state agencies, geological survey organizations, and other commercial imagery providers. These aerial photos are used to create detailed maps and other unique features, such as 3D trees and buildings.Īt the same time, Google only develops some images they use to create the Google Maps and Google Earth experience. In the case of Google Maps and Google Earth, they also tap into planes that fly over land while taking even higher-quality ground images. It's common for satellites in space to take high-resolution photos, but that's not to say it's the only method to capture these images. Google Maps and Google Earth are the most well-known examples many of us turn to when we want to view satellite images online. ![]()
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