The NSIDC Web site and data services are currently having intermittent problems and may be unavailable. We are working to restore these services as soon as possible and apologize for any inconvenience this may cause. Please contact NSIDC User Services for assistance.
The spacing is every 0.25 degrees latitude and every 0.25 degrees longitude.
The resulting dimensions are x=1440 pixels, y = 361 pixels.
very light gray = pixel representing a digitized SIGRID point.
black = pixel representing a non-digitized point.