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eheader - display and modify headers of EPPL7 data files
eheader options files
maplist files
mapalign base_file [-v] files
Applies given editing commands to list of epp or dgt files.
Several commands
are applicable to both file types and several to epp (raster) files only.
No warning is issued when dgt file is processed during section when epp-specific
commands used, becouse several epp-files can be processed at same time.
No warning is issued also when no editing commands given, therefore this
utility can be used just for viewing header information.
When invoked as
maplist, simply dumps headers of given files.
when invoked as mapalign
performs same operations as with -A key, but only other option accepted
is -v. This option may be given as before, as after base file.
This commands can be applied to both dgt (vector) and epp (raster)
files.
- -v
- - dumps file header information after applying any edit options
to stdout.
- -x increment
- - shifts alternative x by increment. Increment
can be any real number, both positive and negative.
- -y increment
- - same
with alternative y
- -s factor
- - multiplies all coordinates by factor
This
commands cannot be used together with explicit settings of some alternative
coordinate limit.
- -Xl value or -XL value
- - sets alternative x of left border
to specified value
- -Xr value or -XR value
- - same with right border
- -Yb value
or -YB value,-Yt value or -YT
- - same with bottom and top y
- -p name
- - set
projection type to name. Available projection types ( EPPL7 version 3.0
) are:
- none
- - cause EPPL ver 3 to say "No alternate coordinates"
- utm
or UTM
- - UTM projection
- stplate
- - state plane (projection for US state
maps)
- ll
- - latitude and longitude (geographic coordinates)
Following is applicable to EPP files only:
- -o n
- - set offsite
value to n. Value can be in range -32768 65535. Negative values are equivalent
to 65536-abs(n). Values above 255, applied to 8-bit data files are silently
translated into -1 (no offsite)
- -fr n
- - set first row to n and updates
last row field respectively.
- -fc n
- - set first column to n and updates
last column field.
- -A filename
- - align to specified file, i.e updates row/column
coordinates so row and column with same number have same alternative coordinates.
- -a value
- - set cell area to value.
- -c "string"
- - fills description field
of the header. String must be single command line argument, but not nessecary
need quotes.
- -u name
- - set area unit type, where unit type may be:
- none
- - cause EPPL ver 3 to say "No alternate coordinates"
- ft
- - square feet
- m
- - square meters
- km
- - square kilometers
- mile - square miles
- ha
- - hectares
- acre
- - acres
This command does not perform any recalculation, it just
update unit name field. Use -a command for change cell area value respectively.
Some options of eheader cannot coexist together
in same command line. there are two groups of options with incompatibilities
between subgroup of each group.
First, options dealing with alternative
coordinates. There are options -Xl -Xr -Yt -Yb, which set alternative coordinates
explicitely, and options -x -y -s, which change coordinates by arithmetic
calculations. Explicit and arithmetic changes of coordinates are not allowed
simulateneously, becouse it is to hard to understand, which kind user
want to apply first.
Second, options dealing with row/column coordinates
of epp files. Here there are options -A and -fr -fc which performs directly
opposite task. (usially -fr -lr are used to set first row and column to
one, to process file cutted from large file separately and -A to change
it back to mosaic(1)
file into larger one.
lessa(1)
, mappaint(1)
,
mapcopy(1)
epp(5)
, dgt(5)
No check is performed by -fr and -lr command
to ensure that row/column values are in valid range.
-A command sometimes
miscalculates one cell. (but EPPL ver 2.1 does the same).
Vitus Wagner,
SoftWeyr.
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