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Christian's Work
In 2015 I worked to produce a mask for use in an Appalachian Voices study. This mask was also incorporated into the SkyTruth Earth Engine script which attempts to ID active MTR mining sites based on NDVI. The mask was created to remove areas with a similar spectral reflectance from the results of the EE script.
For the creation of the original mask, the following layers were downloaded from the US Census Bureau's Tiger/Line FTP site for 2014: Area Water Linear Water Roads Urban Areas
The original mask covers all counties in West Virginia, as well as counties from Virginia, Tennessee, and Kentucky (the complete list of VA, TN, & KY counties included can be seen in Issue #13).
Once downloaded the shapefiles from Tiger/Line database were reprojected (from EPSG:4269) to a CRS which had map units as meters (examples would be EPSG:3857 and EPSG:32617). The Linear Water and Roads layers were merged together, and then buffered out by 60 meters. Area Water was buffered out by 60 meters. The Urban Areas layer (which is a nation wide layer) was clipped to the study area, but was not buffered. All layers were then merged together and rasterized. This created a raster layer which possessed a value of 1 where roads, rivers/streams/ponds/lakes, and urban areas were present and a value of 0 where they were not. The original mask is available here, as well as an alternate where the buffer distance was set to 120 meters.
To be added...
DONE: Creation of mask (link to mask page)
basically: Area Water, Linear Water, Roads, Urban Areas layers downloaded from USCB's Tiger/Lines dataset for 2014
- Work expanding the original script to output MTR sites for multiple years --> Brute force
- Testing of alternate Vegetation Indexes and their results
- statistical results of testing VI thresholds and conclusions to date --> note that still awaiting word from Andrew if this is enough
- creation of code segment to calculate a class for reclaimed mine land --> basic subtraction, hoping to expand
- work to date on erode/dilate to remove outlying pixels from EE output map