The PDS Cartography and Imaging Sciences Node (“Imaging” or IMG) Annex is a data portal designed to support the public delivery of NASA-funded geospatial data products derived from PDS image data. Examples of geospatial derived products are cartographic and thematic maps of moons and planets, local and regional geologic feature maps, topographic and perspective views of planetary landing sites, and tabular data containing feature or unit information derived from planetary data. Many of these products have been developed as a result of NASA data analysis programs, often years after active missions (and their accumulating archives) have ended. As of January 2017, the Annex is considered PDS-Equivalent by NASA as a long-term data repository.
The image data in the Annex are both PDS3 and PDS4 compliant, with the majority served as 16-bit raw image files (typically GeoTIFF files) with detached PDS3 and ISIS3 headers. In this format, these files are PDS4 2D “arrays” (see Section 4.2.1, starting on text page 11 for a summary of PDS4-compliant data formats). Browse images in the Annex are typically served as JPEG (.jpg) or TIFF (.tif) files (PDS4 "encoded byte streams"). PDS4 archive structures and labels for all Annex data are under development.
Note that the Cartography and Imaging Sciences Node is currently working on identifying PDS4-compliant data formats that are suitable for archiving GIS vector data (e.g., shapefiles). We are currently considering an implementation that involves either the Geographic Markup Language (GML, see info here) or the GeoCSV (see info here), possibly a combination of both. Please refer to this page for updates on the progress of these efforts.
For further information, please read: