Hi, I'm looking for a method to perform urban analysis with remote sensing, specifically I need to know how to use certain bands to see the viability of roofs susceptible to be waterproofed by their spectral behavior, for this I have Ikonos images like this https://drive.google.com/file/d/1LV_OVJhZ4f9ZqgQdnyv5At075jzH06iw/view?usp=sharing
On the other hand, I would need this analysis to be done with some free remote sensing software
Thanks a lot!