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What are major open issues or key notes with The National Map Viewer?

Open Issues/Key Notes

(last updated: 2/2/2012)


  • Tested in Internet Explorer 8+, Chrome, Firefox 3.6+, and Safari on Windows and Apple operating systems. Other browsers and platforms have not been fully tested.
  • Help icons (symbolized with a '?') may not work in some browsers unless pop-ups are enabled.
  • Buffering operations sometimes fail.
  • Error messages may be too small to show the 'Close' button.
  • The 'Blank' base map option shows a dark gray background instead of white.
  • When adding a map service through 'Add Data', all layers default to turned off, unlike overlays at the left, which are all turned on by default.
  • The scale bar, or representative fraction (RF), shown at the bottom of the viewer window assumes a monitor resolution of 96 dpi. The scale bar is based on the window size when the viewer session starts, and does not resize if the browser window changes size.


  • Legend icons (or "swatches") may not appear.
  • Adding REST services fails to bring in Legend or Service Metadata.
  • Adding WMS services with too many layers may generate a timeout error.
  • Internet Explorer 8 does not support 'View In: ArcGIS.com Map' capability for any of The National Map dynamic services in the Service Endpoints list at http://viewer.nationalmap.gov/example/services.html.



  • Save As-Print progress window does not provide feedback on which service is taking too long to respond.
  • Exported annotations saved as Shapefiles cannot be added back during a later viewer session because of a difference in projections/datums used between the Shapefile (WGS84) and the viewer base map, which is in WGS84 Web Mercator (Auxiliary Sphere).

Tags: Maps, Topographic, Recreation, Quadrangle, GeoPDF, Scale