Brightness - Remote Sensing and GIS Laboratory

Assignment – Part B
• We have 3 images for 3 different periods for the Camp Williams – Utah Lake area
(CWUL_Aug99.img, CWUL_Oct99.img, and CWUL_May00). Obtain BGW indices
for each of these images using the previously defined model and coefficients.
• Provide snapshots of the 3 results similar to the depiction in the previous slide.
Please label appropriately for each temporal scenario.
• By visually comparing the indices, what major changes do you see i.e. brightness differences
among temporal scenarios. What do you think is the cause for such changes - If any –
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• We also have as ancillary data an image (GAP-CWUL.img) which contains land cover
categories from the SWRGAP project. This image can be used - Hopefully !! – to see the
rationale of our 3 Greenness indices across time.
(a) Briefly, how would you derive simple inferences Hint! – Think about seasonal precipitation
and phenology patterns
(b) Choose two land cover categories (of your choice), and record 5 values for each land cover
category and for each temporal scenario (Greenness indices only). Prepare a table with these
values and a simple graph and include them in your report. Does this help you for answering (a)
(c) Briefly, mention 3 examples for which you would use BGW indices
Have fun!