3 ms·
Here's the link to what this article is referring to: https://worldview.earthdata.nasa.gov/ https://worldview.earthdata.nasa.gov/
by pul 8y ago
Here's the link to what this article is referring to: https://worldview.earthdata.nasa.gov/ https://worldview.earthdata.nasa.gov/
- stinos 8y agoNice. Is there a simple explanation somewhere of what the different bands mean? E.g. I'm looking at my place now and we have this spot on our property where the vegetation is quite different and this exact spot shows up clearly on the NDVI layer. Houses etc do as well so could be temperature?
- agcopenhaver 8y agoNDVI is a well established vegetation index that takes advantage of the relatively unique spectral qualities of vegetation, in that it absorbs large amounts of red light and reflects large amounts of infrared. It is the normalized difference of a sensor's near infrared band and its red band. There are numerous band combinations available to highlight certain materials within a scene. Here is a link describing some additional indices: http://www.harrisgeospatial.com/docs/AlphabeticalListSpectralIndices.html http://www.harrisgeospatial.com/docs/AlphabeticalListSpectra... Additionally, here is a brief description of different individual bands and how they can be used: https://gisgeography.com/spectral-signature/ https://gisgeography.com/spectral-signature/
- stinos 8y agoThanks for this, very helpful!
- sp332 8y agoIs this a web-based version of World Wind, or a separate project? https://en.wikipedia.org/wiki/NASA_World_Wind https://en.wikipedia.org/wiki/NASA_World_Wind
- noiv 8y agoDifferent interfaces - data sources mostly overlap as they are in the public domain.