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nextgis / dhi

Collection of scripts to create DHI data
MIT License
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Shift in location between EVI and NDVI #5

Closed simgislab closed 8 years ago

amuriy commented 8 years ago

Shift in location between EVI and NDVI not found.

simgislab commented 8 years ago

there is actually a difference, if you compare between two final DHIs in WGS84, but there is none in SIN

try reprojecting them again with

gdalwarp -t_srs "EPSG:4326" -tr 0.0083 0.0083 dhi_ndviqa_f.tif ..\dhi_ndviqa_f2.tif```
amuriy commented 8 years ago

It was bug in GRASS location, in which DHI's were computed. EVI and NDVI mapsets were computed in different projections (lat/long and sinusoidal), but in the same units (meters). Now projection of the whole location changed to sinusoidal, DHI NDVI was recomputed and transformed to WGS84.

simgislab commented 8 years ago

DHI of FPAR, LAI, EVI, NDVI should all match

NDVI used to aligh with FPAR/LAI, now it doesn't. But it does align with EVI.

amuriy commented 8 years ago

Done