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MODIS/Terra Land Water Mask Derived from MODIS and SRTM L3 Global 250m SIN Grid V005
Entry ID: MOD44W

Abstract: The MODIS 250 m land-water mask (Short Name: MOD44W) is an improvement over the existing MODIS Nadir Bidirectional Reflectance Distribution Function (BRDF)-Adjusted Reflectance (NBAR) and MODIS land cover-based global land-water mask (Salomon et al., 2004). The MODIS NBAR and land cover–based mask was itself an improved version of the EOS DEM-based land-water mask (Logan et al., 1999). This MODIS 250 m mask is primarily created with three different data inputs:

1. The Shuttle Radar Topography Mission’s (SRTM) Water Body Dataset (SWBD) (Areas between 60° S to 60° N);
2. The MOD44C, a non-public, 250 m global 16-day composite collection based on 8+ years of Terra MODIS data, and 6+ years of Aqua MODIS data. This data set originally provided the input to produce the Vegetative Cover Conversion, and Vegetative Continuous Fields products (Areas between 60° N to 90° N); and

3. The MODIS–based Mosaic of Antarctica (MOA), which is a 250 m MODIS level-1b mosaic for Antarctica (Areas within Antarctica between 60° S and 90° S).
Other appropriate and publicly available data sets were also used to supplement the production of the MODIS 250 m land–water mask. Additional details regarding the methodology are available in the User Guide.

This marks the first time that such a global MODIS-SRTM land-water mask is offered publicly to end-users. This data set is provided in the same gridded tile structure that is common to several higher-level MODIS land products.

V005 Data Set Characteristics:
Area: ~10° x 10° (at the equator)
Image Dimensions: 4800 x 4800 (rows/columns)
File Size: ~250 KB
Resolution: 250 meters
Projection: Sinusoidal
Data Format: HDF-EOS
Science Data Sets (HDF SDS Layers): 2

Purpose: Science Research

Related URL
Link: View Related Information

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Description: Data set landing page at the LP DAAC

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Description: Interface to search, discover, and access EOS data products, and invoke available data services.

Link: View Related Information
Description: LP DAAC Data Pool provides direct access to all currently available MODIS products and the ability to download them via HTTP.

Link: View Related Information
Description: USGS EarthExplorer (EE) provides users the ability to query, search and order archived ASTER and MODIS products available from the LP DAAC. Registered users of EE have access to additional features than guest users.

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Description: The Land Processes Distributed Active Archive Center (LP DAAC) is one of several discipline-specific data centers within the NASA Earth Observing System Data and Information System (EOSDIS). The LP DAAC Web page provides information about available data products, services, documentation, order interfaces, and tools.

Link: View Related Information
Description: The MODIS Land home page is maintained through NASA's Goddard Space Flight Center and documents various aspects of the land component of the MODIS mission.

Geographic Coverage
 N: 90.0 S: -90.0  E: 180.0  W: -180.0

Data Set Citation
Version: 005

Temporal Coverage
Start Date: 1999-12-18

Science Keywords

ISO Topic Category

Terra >Earth Observing System, TERRA (AM-1)    [Information]

MODIS >Moderate-Resolution Imaging Spectroradiometer    [Information]

Data Set Progress

Creation and Review Dates
DIF Creation Date: 2009-07-22
Last DIF Revision Date: 2016-01-27

Link to Web Site