NAD2NAD(1)NAD2NAD(1)NAMEnad2nad - North American Datum conversion filter
SYNOPSISnad2nad [ -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 optionally 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 arguments which
define various characteristics and processing modes
of the respective input data. Usage allows multi
ple arguments to be included with a - operator when
separated by commas. Datum conversion requires the
data to be in geographic 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 respective 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. Surveyor's feet.
This is allowed only when the spcs option
been previously used. Default coordi
nates 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 northern part of
California.
-ta A specifies a character employed as the first char
acter 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 output 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 output before
ouput values.
-f format
Format is a printf format string to control the
form of the output values. For inverse projec
tions, the output will be in degrees when this
option is employed. If a format is specified for
inverse projection the output data will be in deci
mal degrees. The default format is "%.2f" for for
ward 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) spec
ify the source of data to be transformed. A - will spec
ify the location of processing standard input. If no
files are specified, 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, other
wise in meters or feet (feet option used). Input data
fields must be separated 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 ALSOcs2cs(1U), proj(1U),
Cartographic Projection Procedures for the UNIX Environ_
ment--A User's Manual, (Evenden, 1990, Open-file report
90-284).
HOME PAGE
http://www.remotesensing.org/proj
