## 6 Earth Observation Tools
\begin{table}
\begin{tabular}{l l l} \hline
**Product Name** & **Description** & **URL** \\ \hline Randolph Glacier & Global glacier inventory in vector format. While the RGI is a & [[http://www.glims.org/RGI/rand](http://www.glims.org/RGI/rand)]([http://www.glims.org/RGI/rand](http://www.glims.org/RGI/rand)) \\ Inventory (RGI) & comprehensive snapshot, the GLIMS glacier database (see above) & olph.html [154] \\  & offers the ability to study change over time. & \\ \hline Rutgers Global Snow & Northern hemisphere snow cover absolute extent and anomalies & [[http://climate.rutgers.edu/snowe](http://climate.rutgers.edu/snowe)]([http://climate.rutgers.edu/snowe](http://climate.rutgers.edu/snowe)) \\ Lab & at multiple temporal scales. Created using the Interactive & over/ \\  & Multisensor Snow and Ice Mapping System & \\  & ([[http://www.natice.noaa.gov/ims/ims](http://www.natice.noaa.gov/ims/ims)]([http://www.natice.noaa.gov/ims/ims](http://www.natice.noaa.gov/ims/ims))\_1.html). & \\ Scatterometer Ice & Sea ice extent products derived from active microwave & [[http://www.scp.byu.edu/data/ice](http://www.scp.byu.edu/data/ice)]([http://www.scp.byu.edu/data/ice](http://www.scp.byu.edu/data/ice)) \\ Extent Products & scatterometer data are available for both NSCAT and QuikSCAT & extent.html \\  & in the Arctic and the Antarctic, provided in the appropriate polar & \\  & stereographic grids on a near-real-time basis [155]. & \\ Sea Ice Products & A range of both in-depth and very easy-to-use sea ice products & [[http://nsidc.org/data/senice/data](http://nsidc.org/data/senice/data)]([http://nsidc.org/data/senice/data](http://nsidc.org/data/senice/data)) \\  & are available, including the passive microwave products & summaries.html and \\  & (e.g., [52,156]), VIR products (e.g., [157,158]), field & [[http://nsidc.org/data/easytouse.h](http://nsidc.org/data/easytouse.h)]([http://nsidc.org/data/easytouse.h](http://nsidc.org/data/easytouse.h)) \\  & observations, Multisensor Analyzed Sea Ice Extent & tml/seaice \\  & (MASIE) [159], Sea Ice Index [160], Sea Ice trends and & \\  & Climatologies [161], National Ice Center Charts [162] and & \\  & Northern Hemisphere Ice and Snow Extents [163]. & \\ \hline Shuttle Radar & A DEM gridded at 90-m spatial resolution for all areas on Earth & [[http://www2.jpl.nas.gov/strm/](http://www2.jpl.nas.gov/strm/)]([http://www2.jpl.nas.gov/strm/](http://www2.jpl.nas.gov/strm/)) \\ Topography Mission & between 60\({}^{\circ}\)S and 60\({}^{\circ}\)N. In addition to the raw products provided & and [[http://www.cgiar-](http://www.cgiar-)]([http://www.cgiar-](http://www.cgiar-)) \\ (SRTM) DEMs & by NASA, some hole-filled versions are available. & csi.org/data/strm-90m-digital- \\  & elevation-database-v4-1 & [106, 107, 108] \\ \hline Soil Moisture & Derived from the Aquarius microwave radiometer, swath and & [[http://nsidc.org/data/aquarius/1](http://nsidc.org/data/aquarius/1)]([http://nsidc.org/data/aquarius/1](http://nsidc.org/data/aquarius/1)) \\  & gridded products are available at multiple temporal resolutions & ndex.html [164] \\  & ranging from daily to annual. & \\ \hline SpecMap Web Viewer & These data, based on WorldView imagery, are spectral indices & [[http://www.pgc.umn.edu/about/r](http://www.pgc.umn.edu/about/r)]([http://www.pgc.umn.edu/about/r](http://www.pgc.umn.edu/about/r)) \\  & that highlight compositional variability throughout Antarctica’s & esarch/specmap/ \\  & Central Transantarctic Mountains (83–84\({}^{\circ}\)S, 160\({}^{\circ}\)W–170\({}^{\circ}\)E) & \\  & [165]. At 5-m spatial resolution, this product has a significantly & \\  & higher resolution than regional geological maps from the 1960s. & \\ \hline \end{tabular}
\end{table} 
Table 2: _Cont._as the right data are becoming easier to access, so too is remote sensing software an opening field with many solutions for users.