Questions tagged [band-ratio]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0
votes
1answer
26 views

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 ...
4
votes
1answer
2k views

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 "...
1
vote
1answer
41 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 ...