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 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 multiple 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 recognized 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 coordinates 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 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 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 projections, 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 decimal
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 transformed. A - will specify 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, otherwise 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 ALSO
cs2cs(1U), proj(1U),
Cartographic Projection Procedures for the UNIX EnvironmentA Users
Manual, (Evenden, 1990, Open-file report 90-284).
HOME PAGE
http://www.remotesensing.org/proj
2000/03/21 Rel. 4.4