NADCON files

There are seven pairs of the U.S. NADCON (North American Datum Conversion) grid-shift files provided in the $PROHOME/etc directory that define seven datum codes. The following defines the legend for the table that follows it.

Datum Code	Datum Name Location (File in $PCIHOME/etc) Area covered	Ellipsoid Used
"D-01"	NAD27 (USA, NADCON) Continental U.S. ("conus.los", "conus.las") Longitudes: 63d W to 131d W Latitudes: 20d N to 50d N Resolution: 15 minutes	"E000" Clarke 1866
"D-07"	NAD27 (USA, NADCON) Alaska ("alaska.los", "alaska.las") Longitudes: 128d W to 194d W Latitudes: 50d N to 74d N Resolution: 7.5 minutes	"E000" Clarke 1866
"D-09"	NAD27 (USA, NADCON) St. George, Alaska ("stgeorge.los", "stgeorge.las") Longitudes: 169d W to 171d W Latitudes: 56d N to 57d N Resolution: 1 minute	"E000" Clarke 1866
"D-11"	NAD27 (USA, NADCON) St. Lawrence, Alaska ("stlrnc.los", "stlrnc.las") Longitudes: 168d W to 172d W Latitudes: 62d N to 64d N Resolution: 3 minutes	"E000" Clarke 1866
"D-13"	NAD27 (USA, NADCON) St. Paul, Alaska ("stpaul.los", "stpaul.las") Longitudes: 169d W to 171d W Latitudes: 57d N to 58d N Resolution: 3 minutes	"E000" Clarke 1866
"D-15"	Old Hawaiian (USA, NADCON) Hawaii ("hawaii.los", "hawaii.las") Longitudes: 154d W to 161d W Latitudes: 18d N to 23d N Resolution: 1.5 minutes	"E000" Clarke 1866
"D-17"	NAD27 (USA, NADCON) Puerto Rico and Virgin Islands ("prvi.los", "prvi.las") Longitudes: 64d W to 68d W Latitudes: 17d N to 19d N Resolution: 3 minutes	"E000" Clarke 1866