Questions tagged [band-ratio]

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Landsat imagery corrections

I have downloaded Landsat collection 1 Level 1 imagery (Landsat 4,5,7 and 8) from https://earthexplorer.usgs.gov/. I would like to know that do we have to apply some conversions or corrections before ...
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48 views

Perform Band Ratio in GEE

I was new in GIS and Google Earth Engine, i want to perform band ratio for mapping Ferric and Ferrous using ASTER L1T Radiance. I want to use band 2/1, 5/3, and 1/2. How to perform it in Google Earth ...
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Band Ratios in GRASS

I am trying to execute in mapcalc a simple band ratio exercise. I have set new map as "Band 12" and entered this equation into mapcalc: Band12== Band1@MApset/Band2@Mapset I hit "Run" but I keep ...
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Excluding nodata value in band calculation with Rasterio?

How do I exclude no data values when doing a raster calculation with rasterio. I realise that the files are read into an array, and that "0" is a nodata value. However, when I do a simple sum like "...
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45 views

How to apply Melt Area Detection Index to MODIS imagery?

I am working with some MODIS imagery for a project (I'm relatively new to remote sensing) using MOD09GA, and hoping to apply a melt area detection index (MADI) to images to calculate melt day length ...