I'm working on a very large study area. The aim is to create a vegetation mask representing only pines. I'm using Landsat 7 images. Since the recordings were made in the winter it's pretty easy to distinguish the conifers from the rest, because everything else is covered with snow.
Unfortunately I do not get a satisfactory result. What is the best methodology to get good results? I've tried to use a NDVI. Unfortunately, the results are bad.
I have also tried to use a tasseled cap transformation. Unfortunately, I have no experience using TC, so I'm not sure how to interpret/use the results.
I am using Erdas Imagine and ArcGIS.
Do you have any tips on how I can solve the problem?