Using Web-based Tools for GIS-Friendly Satellite Imagery

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1 Using Web-based Tools for GIS-Friendly Satellite Imagery Lindsey Harriman SGT, Contractor to the USGS EROS Center, Sioux Falls, South Dakota **Work performed under USGS contract G10PC00044 U.S. Department of the Interior U.S. Geological Survey

2 Introduction Lindsey Harriman - Science Integration Task Manager, NASA LP DAAC LP DAAC: Land Processes Distributed Active Archive Center Partnership between the U.S. Geological Survey (USGS) and the National Aeronautics and Space Administration (NASA) Located within the USGS Earth Resources and Observation Center (EROS) in Sioux Falls, South Dakota, USA 1 of 12 NASA Earth Observing System Data and Information System (EOSDIS) DAACs

3 More about the LP DAAC The LP DAAC processes, archives, and distributes land remote sensing data from: - Moderate Resolution Imaging Spectroradiometer (MODIS) - Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) - Selected NASA MEaSUREs products - Community Products

4 What is GIS-Unfriendly Satellite Imagery? Difficult file format Too much data to download Too much data covers my AOI It takes lots of data to cover my AOI Mismatched projections

5 What is GIS-Friendly Satellite Imagery? Choose your own file format Download the band(s) you need Subset data by location Mosaic data on the fly Choose your own projection

6 Web-Based Tools Global Data Explorer (GDEx) - MRT Web - TerraLook -

7 Global Data Explorer (GDEx) Funded through NASA ROSES 2005 ACCESS Program A collaboration between the LP DAAC and George Mason University's Center for Spatial Information Science and Systems A seamless data viewer providing access to multiple sources of digital elevation data sets Users can subset and download data by area of interest in multiple formats and projections

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9 Available Data in GDEx ASTER Global Digital Elevation Model v2 MODIS Land Cover Type (IGBP classification) NASA MEaSUREs SRTM (1 & 3 arc sec, Combined 1 arc sec) NGA SRTM (1 & 3 arc sec) GTOPO 30 NASA Blue Marble

10 GDEx Functions and Features Identify a pre-defined square or draw your own polygon area of interest (AOI) Pre-defined AOIs (county, state, country) Advanced, on-the-fly processing - Mosaic several tiles - Clip tile data, or mosaicked data, to AOI - Reformat to GeoTIFF, ArcASCII, or JPEG - Choose UTM or Lat/Long projection Preview data before download

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12 GDEx Tile Limits Product Tile mosaic limit ASTER GDEM 20 NASA SRTM 1 arcsec 36 NASA SRTM 3 arcsec 50 MODIS Land Cover 300

13 GDEx Granule Limits

14 MRTWeb Developed by the LP DAAC to provide services for tiled MODIS data products Multiple MODIS data products - Terra MODIS - Aqua MODIS - Combined MODIS products Web interface: API:

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16 Available Data in MRTWeb Most MODIS tiled products - Surface Reflectance - Albedo - Vegetation Indices - Land Surface Temperature - Fire - Leaf Area Index - Primary Productivity

17 MRTWeb Functions and Features Mosaic up to 50 tiles Clip tile data, or mosaicked data, to AOI Download only the spectral bands you need API available create your own programmatic workflow

18 MRTWeb Functions and Features Choose format: - HDF, HDR, or TIFF - Download bundle also includes original HDF Choose Projection - Sinusoidal - UTM - Albers Equal Area - Polar Stereographic - Lambert Azimuthal - Geographic

19 Easily apply colormap Import results from MRTWeb

20 MRTWeb Tile Limits Orders for up to 50 tiles Mosaicking of up to 50 tiles, reprojection, reformat, etc.

21 MRTWeb Tile Limits

22 TerraLook Joint project between USGS EROS and the NASA Jet Propulsion Laboratory (JPL) Designed to: - Provide satellite images that show changes in the Earth s surface over time - Allow users to make visual interpretations of these changes

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24 Available Data in TerraLook Complete up-to-date inventory of ASTER images for the entire world Three Tri-Decadal Global Landsat Orthorectified epochs Images are: - Simulated natural color - Georeferenced JPEGs - Resampled, but resolution still near native

25 TerraLook Features and Functions Integrated into the USGS GloVis interface to search and download Availability of archived collections (through 2012) Images are bundled with: - Standards-compliant metadata - A world file - An outline of each image s ground footprint

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27 Questions?

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