MODAPS PCR 12-014
| PCR Number | 12-014 |
|---|---|
| Date | 2012-05-22 |
| Initiator | Sadashiva Devadiga |
| Abstract | To document the critical error identified in the C5 land cover product (MCD12Q1) in PGE41 v51.0.1. |
| Problem Statement | Critical error identified in the Collection 5 (C5) version of the product - The Collection 5 MCD12Q1 product contained a trend of steadily increasing boreal tree cover between 2001 and 2009 that is unrelated to actual forest change.A coding error in PGE41 caused inconsistency between the datasets in the file created at MODAPS |
| Description of Change | The problem was caused by land cover changes within the training site database used to produce the maps. To resolve this issue, the training site database was filtered for changed and otherwise poor quality sites. The Collection 5.1 MODIS Land Cover product was generated following the algorithm described by Friedl et al. (Remote Sensing of Environment, 114, 168‐182) using the revised training data. PGE41 was fixed to remove copying of observation from the prior version LC input file |
| Products Affected | MCD12Q1 |
| Software Affected | PGE41 v51.0.1 |
| Processing String to Receive the Change | Terra Forward, Terra Reprocessing, Aqua Forward, Aqua Reprocessing |
| Downstream Product Effects | None |
| Data Granules to be Used for Science Testing | Generate global data for 1-year. |
| Justification | The error in the C5 land cover product is very critical. The new C51 product fixes the critical issue. The issues addressed by this C51 fix are posted on the LDOPE QA web page at http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/displayCase.cgi?esdt=MCD12&caseNum=PM_MCD12_11001&caseLocation=cases_data |
| Effective Date for Implementation of Change | Done |
| Status | Science test completed; results evalutated by the Science Team at the SCF and at MODAPS. Sadashiva Devadiga approved on 06/02/2012. Michael King approved on 06/04/2012. |
