"Lake Mead Area - Approaching Las Vegas" by Udo S / flickr.com / CC By-NCND2.0
View full-size imageThe Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) Water Reservoir 8-Day Level 3 (L3) Global (MYD28C2) Version 6.1 product provides current data for 151 man-made reservoirs and 13 regulated natural lakes for a total of 164 reservoirs.
The MYD28C2 Version 6.1 data product provides an 8-day time series of surface area, elevation, and water storage. Datasets are combined with pre-established Area-Elevation (A-E) curves and image classifications of near-infrared (NIR) reflectance from the surface reflectance product acquired by the Aqua satellite (MYD09Q1).
The MYD28C2 data product contains a single layer with information about the reservoir identifier, dam location (longitude and latitude), reservoir area, elevation, and storage capacity.
Validation at stage 1 has been achieved for the MODIS Water Reservoir product suite. Further details regarding MODIS land product validation for the MYD28 data products are available from the MODIS Land Team Validation site.
| Characteristic | Description |
|---|---|
| Collection | Aqua MODIS |
| DOI | 10.5067/MODIS/MYD28C2.061 |
| File Size | ~24 KB |
| Temporal Resolution | Multi-Day |
| Temporal Extent | 2002-07-04 to Present |
| Spatial Extent | Global |
| Coordinate System | Geographic Latitude and Longitude |
| Datum | N/A |
| File Format | HDF |
| Geographic Dimensions | Global |
| Characteristic | Description |
|---|---|
| Number of Science Dataset (SDS) Layers | 1 |
| Columns/Rows | N/A |
| Pixel Size | N/A |
| SDS Name | Description | Units | Data Type | Fill Value | No Data Value | Valid Range | Scale Factor |
|---|---|---|---|---|---|---|---|
| Lakes | 8-day aggregated global lake area, elevation, and storage | N/A | N/A | -9999.0 | N/A | N/A | N/A |
A list of the 164 reservoir identifiers and related attributes are provided in Appendix A of the User Guide
Quality information is provided in Section 5 of the Algorithm Theoretical Basis Document (ATBD).
Water occurrence images generally show smaller surface area dynamics in high latitude regions, creating pixels with low occurrence values that have relatively large uncertainties. In addition, the quality of raw water area classification can be affected by lake ice coverage typically creating an overestimation of surface area in the enhancement algorithm. This issue will be addressed in a future release of the enhancement algorithm. For additional information about known issues, refer to Section 4 in the User Guide.