ForWarn

Satellite-Based Change Recognition and Tracking

Data Access

ForWarn data are readily accessed through the project’s Forest Change Assessment Viewer using a standard internet browser.

To learn more about the functions and features of the Assessment Viewer, please read the Forest Change Assessment Viewer Users Guide

Web Map Service (WMS) Access

WMS allows access to the ForWarn forest change images using your desktop GIS or mobile mapping application software. The advantages of viewing the forest change images locally are: (1) to overlay with your GIS layers, (2) to screen-digitize disturbance extent and severity, (3) the increased use and functionality of a desktop GIS, and (4) to view the forest change images via mobile devices (such as using OruxMaps with Droid-based handhelds). Use the following WMS connection strings to access the ForWarn data products:

WMS Dataset Contents Connection URL (ArcGIS users denote version 1.0.0)
All-Year baseline forest
change images
(Web Mercator)		 Begins 01/08/2010 for all-year baseline-only; current, previous 1 and previous 2 available for all baseline periods, disregard 16-day composite products http://wms.forwarn.forestthreats.org/ews
[GetCapabilities]
All-Year baseline forest
change images
(WGS84)		 Begins 01/08/2010 for all-year baseline-only; current, previous 1 and previous 2 available for all baseline periods, disregard 16-day composite products http://wms.forwarn.forestthreats.org/ewswgs84
[GetCapabilities]
1-year baseline forest change images Begins 01/08/2010 through current for 1-year baseline-only http://wms.forwarn.forestthreats.org/ews1year
[GetCapabilities]
3-year baseline forest change images Begins 01/08/2010 through current for 3-year baseline only http://wms.forwarn.forestthreats.org/ews3year
[GetCapabilities]
Cloud Product, MODIS
True Color Composites
(500m)		 Begins 01/08/2010 through current http://wms.forwarn.forestthreats.org/ewstruecolor
[GetCapabilities]
Vector Layers MODIS Fire, MTBS, ADS, “PestProx”, etc. http://wms.forwarn.forestthreats.org/vlayers
[GetCapabilities]
Phenological
Derivatives*		 National Phenology Dataset, not current http://wms.forwarn.forestthreats.org/derivatives
[GetCapabilities]
NDVI MODIS NDVI (22 images / yr, 2003-2009) http://wms.forwarn.forestthreats.org/modisndvi
[GetCapabilities]
Phenological Parameters* National Phenology Dataset, not current http://wms.forwarn.forestthreats.org/parameters
[GetCapabilities]
Cumulative Integrals* National Phenology Dataset, (22) 16-day images / yr, 2003-2009), not current http://wms.forwarn.forestthreats.org/integrals
[GetCapabilities]
W-Layers TRMM, MODIS Cumulative Fire Detections and Large Fire Incidents http://wms.forwarn.forestthreats.org/wlayers
[GetCapabilities]

(*) see Phenology Products Listing

Web Coverage Service (WCS) Download*

WCS allows users with desktop mapping applications the ability to download GIS-ready forest change image products. The benefit of downloading the forest change images allows one the ability to spatially analyze the forest change images’ raster values by themselves or with other GIS data layers. The raster values of the forest change images are percent NDVI departure from a respective baseline time period. Use the following WCS connection string to access the ForWarn data products:

WCS Dataset Contents Connection URL (ArcGIS users denote version 1.0.0)
1-year baseline
forest change images		 Begins 01/08/2010 through the current
image		 http://wms.forwarn.forestthreats.org/ewswcs1year?
[GetCapabilities]
3-year baseline
forest change images		 Begins 01/08/2010 through the current image; includes RSAC FHTET imagery with “bd.tif” denoted in the filename (EFETAC does not provide support for the
RSAC FHTET products)		 http://wms.forwarn.forestthreats.org/ewswcs3year?
[GetCapabilities]
All-year baseline
forest change images		 Begins 01/08/2010 through the current image; contains the “current”, “previous1” and “previous2” images in all three baseline periods; includes RSAC FHTET imagery with “bd.tif” denoted in the filename (EFETAC does not provide support for the RSAC FHTET products) http://wms.forwarn.forestthreats.org/ewswcs?
[GetCapabilities]

(*) ArcGIS-specific Issues:


    1. Software Version and Service Packs
      a. There have been issues reported of being unable to export ForWarn forest change images via the WCS using ArcGIS 10 SP2-4.

    2. Spatial Alignment in ArcGIS 9.3
      a. If you experience alignment issues, you may need to define the incoming projection by changing the datum to “D_Sphere_ARCINFO.”

    3. WCS-Download Procedures PDF

Additional Resources

Right click and select "Save Target As..." to download.