collection 5 refinements and revisions mod12q1 global land cover type mod12q2 land cover dynamics n.
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Collection 5 Refinements and Revisions MOD12Q1: Global Land Cover Type MOD12Q2: Land Cover Dynamics. Mark Friedl Dept of Geography and Environment Boston University friedl@bu.edu www-modis.bu.edu/landcover. MOD12Q1 Overview Global Land Cover Type. Thematic classification of land cover

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collection 5 refinements and revisions mod12q1 global land cover type mod12q2 land cover dynamics

Collection 5 Refinements and RevisionsMOD12Q1: Global Land Cover TypeMOD12Q2: Land Cover Dynamics

Mark Friedl

Dept of Geography and Environment

Boston University

friedl@bu.edu

www-modis.bu.edu/landcover

mod12q1 overview global land cover type
MOD12Q1 OverviewGlobal Land Cover Type
  • Thematic classification of land cover
  • Five Classification Schemes
    • IGBP, UMD, LAI/FPAR, PFT, Biome-BGC
    • Internally consistent!
  • Second most likely IGBP class
  • Classification confidence
  • C4: Global, 1-km, annual (2001-2004)
mod12q2 overview land cover dynamics
MOD12Q2 OverviewLand Cover Dynamics
  • Global database
    • Twice per year
    • 12-month time periods
  • Includes 7 metrics
    • Onset of EVI increase,
    • Onset of EVI maximum,
    • Onset of EVI decrease,
    • Onset of EVI mimimum,
    • Min, max, & sum of growing season EVI
  • Collection 4
    • Produced for 2001-2004
    • Available on the LP DAAC

Timing

Annual

Metrics

mod12q1 summary of key changes

Extract Exemplars From

STEP Database

MOD12Q1: Summary of Key Changes

Estimate Classification

(Ensemble Decision Trees)

  • Revision of land cover training site database
    • Smaller, high quality sites (~1500)
    • More recent scenes (post-2000)
  • Input features
    • 8-day, 500-m NBAR data
      • aggregated to 32-day
    • EVI, LST (MOD11)
    • Annual Metrics
  • Updated “priors” layers
    • Based on MOD12 C4
    • New global agriculture from inventory data

Apply Classification

to Global Data

Fuse Results With

Ancillary Data

(post-processing)

Maps

mod12q2 summary of key changes
MOD12Q2: Summary of Key Changes
  • Temporal resolution
    • Using 8-day EVI
  • Spatial Resolution
    • 500-mNBAR inputs
  • Improved screening for snow
    • Using NBAR snow-flag in combination with LST (MOD11)
  • Identification and correction of several minor bugs in code.
summary
Summary
  • Key Results from Changes
    • Improved spatial resolution (MOD12Q1, Q2)
    • Improved temporal resolution (MOD12Q2)
    • Fewer missing values (MOD12Q1, Q2)
  • Most importantly
    • Improved thematic quality for MOD12Q1
    • Improved accuracy & precision for MOD12Q2
  • Ongoing and Future Activities (C6)
    • Focus on problematic classes; FAO LCCS
    • Stabilization across years
    • Smoothing and interpolation (clouds) for MOD12Q2
    • Validation for C5 versions of both products
    • Creation of 1-km and CMG for C5