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Optimal Scene Selection Based on NDVI Preference Parameters

As the trend shifts towards scenes with high NDVI, understand the weighting factors for selecting scenes using NDVI_B, ACCE scores, acquisition timing, gap coverage, and study year preferences. Interpret sensor data for Landsat 5 and 7, delta NDVI values, and temporal deltas.

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Optimal Scene Selection Based on NDVI Preference Parameters

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  1. Choice #5cIncreasing preference towards selecting scenes with high NDVI_B W_ndvi_B= 90 W_acca_B= 20 W_ndvi_F= 30 W_acca_F= 20 W_difAD_P= 10 W_cover_P= 20 W_difAD_NS= 5 W_difAD_EW= 5 W_difDY_NS= 5 W_difDY_EW= 5 W_useL5= 1 W_useL7= 10 W_sensHomg= 15 W_prefDate= 10 W_prefDOY= 15 Choice #5c

  2. SensorGreen: Landsat 7, Yellow: Landsat 5 Choice #5c

  3. ACCA scoresWhite: 0%, Greens: 1-3%, Yellows: 4-5%, Oranges: 6-7%, Reds 8-9%, Black: 10% Choice #5c

  4. Day of Acquisition (in Julian Day)Warm Red: January, Orange: February, Yellow: March, Yellow-Green: April, Green: May, lt green/white: June, white/lt cyan: July, Cyan: August, dk. Cyan: Sept., Blue: October, Magenta: November, Cool Red: December Choice #5c

  5. Gap CoverageWhite: ~100%, Green: ~96%, Yellow: ~90%, Orange: ~87%, Red: ~80%Black: no fill image (77%) Choice #5c

  6. Time Coincidence with GeoCover 2000White: within 1 cycle, Green: within 2 cycles, Yellow: within 3 cycles, Orange: within 4 cycles, Red: within 5 cycles, Black: over 5 cycles Choice #5c

  7. Study Year PreferenceWhite: 2005 or 2006 Acquisitions, Black: 2004 or 2007 Choice #5c

  8. NDVI (percent of max)White: ~1.0, Green: ~0.8, Yellow: ~0.5, Orange: ~0.3, Red: ~0.1, Black: 0.0 Choice #5c

  9. Delta NDVI between L7 pairsWhite: 0-0.1, Lt. Green: 0.1-0.2, Green: 0.2-0.3, Yellow: 0.3-0.5, Red: >0.5 Choice #5c

  10. Temporal delta between L7 pairsWhite: within 1 cycle, Green: within 2 cycles, Yellow: within 3 cycles, Orange: within 4 cycles, Red: within 5 cycles Choice #5c

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