Outerra forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Download Outerra Tech Demo. Unofficial Outerra Discord server, MicroProse Discord server for OWS.

Author Topic: Global forest map  (Read 6374 times)

Basroks

  • Newbie
  • Posts: 3
  • newbie
Global forest map
« on: November 14, 2013, 07:16:45 pm »
Have you seen this? Could this data be of any use?

http://www.bbc.co.uk/news/science-environment-24934790
Logged

cameni

  • Brano Kemen
  • Outerra Administrator
  • Hero Member
  • *****
  • Posts: 6721
  • No sense of urgency.
    • outerra.com
Re: Global forest map
« Reply #1 on: November 15, 2013, 01:53:18 am »
There are several datasets derived from MODIS (I believe the above is coming from that too), that could be of use. Currently we are using the vegetation index value and a threshold to determine where the trees are, but it's not very good because the needleleaf trees in some areas have the index lower than some low vegetation. We will probably incorporate a separate forest cover dataset, and adjust the existing vegetation index to mean the ground-level vegetation cover only.
Logged

Basroks

  • Newbie
  • Posts: 3
  • newbie
Re: Global forest map
« Reply #2 on: November 17, 2013, 05:09:58 pm »
Ah. I didn't think about the issue with different types of forest. Anyway, as far as I can determine, MODIS data comes from the satellites Terra and Aqua while the Global Forest Change data comes from the Landsat 7 satellite. The latter has a resolution of 30 meters, which I think is a bit better than the MODIS data? Not sure what other differences there are.
Logged