NAD2NAD(1) NAD2NAD(1)
NAME
nad2nad - North American Datum conversion filter
SYNOPSIS
nad2nad [ -eEfihortwW [ args ] ] [ +args ]
file[s]
DESCRIPTION
Program nad2nad is a filter to convert data
between North America Datum 1927 (NAD27) and
North American Datum 1983. nad2nad can option-
ally process both State Plane Coordinate System
(SPCS) and Universal Transverse Mercator (UTM)
grid data as well as geographic data for both
input and output. This can also be accomplished
with the cs2cs program.
The following control parameters can appear in
any order:
-[i|o] keyword[,keyword]
The -i and -o option expect keyword argu-
ments which define various characteris-
tics and processing modes of the respec-
tive input data. Usage allows multiple
arguments to be included with a - opera-
tor when separated by commas. Datum con-
version requires the data to be in geo-
graphic coordinates, but nad2nad will
allow conversion of data to and from SPCS
or UTM grid systems. The following are
keywords and arguments reconized by both
the -i and -o that will apply to respec-
tive input and output conversion of user
data to internal geographic coordinates:
27|83 datum of data
utm=n UTM coordinates in meters for
zone n
spcs=n for data in SPCS coordinates,
where n is state zone number.
feet data units are in U.S. Sur-
veyor’s feet. This is allowed
only when the spcs option been
previously used. Default coor-
dinates are in meters.
bin for data in binary form.
rev data in lat-lon order rather
than default lon-lat order.
hp=ss use high precision conversion
zone ss. Certain States have
ancillary correction tables to
further refine the basic conus
table. Ss key and States are:
FL Florida
MD Maryland
TN Tennessee
WI Wisconsin
WO Washington, Oregon and north-
ern part of California.
-ta A specifies a character employed as the
first character to denote a control line
to be passed through without processing.
This option applicable to ascii input
only. (# is the default value).
-e string
String is an arbitrary string to be out-
put if an error is detected during data
transformations. The default value is:
*\t*. Note that if the -o bin option is
employed, an error is output as HUGE_VAL
for both values.
-r region
specifies which regional conversion table
to employ which are identified by the
following:
conus - conterminous 48 States
alaska - State of Alaska
hawaii - State of Hawaii
prvi - Puerto Rico and Virgin Islands
stgeorge - St. George Is, Alaska
stpaul - St. Paul Is, Alaska
stlrnc - St. Lawrence Is, Alaska
-E Input coordinates are echoed to out-
put before ouput values.
-f format
Format is a printf format string to con-
trol the form of the output values. For
inverse projections, the output will be
in degrees when this option is employed.
If a format is specified for inverse pro-
jection the output data will be in deci-
mal degrees. The default format is %.2f
for forward projection and DMS for
inverse.
-[w|W]n
N is the number of significant fractional
digits to employ for seconds output (when
the option is not specified, -w3 is
assumed). When -W is employed the fields
will be constant width and with leading
zeroes.
One or more files (processed in left to right
order) specify the source of data to be trans-
formed. A - will specify the location of pro-
cessing standard input. If no files are speci-
fied, the input is assumed to be from stdin.
For ASCII input data the two data values must be
in the first two white space separated fields
and when both input and output are ASCII all
trailing portions of the input line are appended
to the output line.
Input geographic data (longitude and latitude)
must be in DMS format when neither utm nor spcs
is specified, otherwise in meters or feet (feet
option used). Input data fields must be sepa-
rated by white space and not have imbedded white
space.
Output data will be in tab separated fields of
DMS or grid coordinates in meters or feet.
Any data after the two input values are echoed
after the two output data values.
SEE ALSO
cs2cs(1U), proj(1U),
Cartographic Projection Procedures for the UNIX
Environment—A User’s Manual, (Evenden, 1990,
Open-file report 90-284).
HOME PAGE
http://www.remotesensing.org/proj
2000/03/21 Rel. 4.4 NAD2NAD(1)
