NDVI is the most common index that analysts use in remote sensing. But how do you calculate it? What do NDVI values represent? How do Earth scientists use NDVI?
How would you like to wave your magic wand and all of a sudden find out how far everything is away from you? No magic wands necessary. This is how LiDAR (Light Detection and Ranging) works – minus the magic wand.
These are 10 useful Geospatial Data portals, We have decided to list 10 of those that we have found most useful, rich with content, easy to use, and with metadata that is available and understandable. In considering such a list, we realize that “most useful” really depends on the application that one is using GIS for, but the following sites should be useful for users in many disciplines. Some allow for data to be streamed from web servers into your GIS software, and all allow data to be downloaded.
The platform offers the fastest engine to search and process satellite and areal imagery I’ve ever seen. On the top, it features a massive set of filters and algorithms to analyze the data at any scale. Now, all these features are available for free to the general public. The company recently launched a new, impressive web-based tool where anyone can access, analyze and download satellite images for free.
The USGS Earth Explorer is a similar tool to the USGS Global Visualization Viewer (GloVis) in that users search catalogs of satellite and aerial imagery. The USGS Earth Explorer is the new and improved version.
Explore the planet more deeply with Esri’s new Landsat Explorer web app! Use the app to both visualize our planet and understand how the Earth has changed over time. Now you can instantly analyze more than 500,000 Landsat 8 and GLS scenes, offering global coverage with over 500 new scenes added every day. The app is free, with no download or installation required.
Google Earth has been reborn.Google unveiled a completely redesigned Google Earth and it does away with the single worst thing about the previous version of the software. Out now for desktop and Android, it no longer requires a separate download — it’s available directly in Chrome. SEE ALSO: Google Maps can now take you deep […]