NAME
xm_rsat_image - RGB Raster format for the xmap8 program
SYNOPSIS
xm_sat_image - Input File Format
DESCRIPTION
The raster file is a 2D or RGB raster image file. (There
will be several formats available for input.) For now files
are read in in ASCII format defined below.
FORMAT
Image Data may be imported into Xmap8 via either simple ascii files
(format below)
---------------------------------------------------------------
Ascii image input:
The files are arranged with a simple header line
describing a corner of the image and the X-Y dimensions of each block.
Then an RGB pixel is read in in order from the corner
across each row.
NX = number in X direction (columns, horizontal)
NY = number in Y direction (rows, vertical)
lat = latitude of corner, positive north
lon = longitude of corner, positive east
x,y = (x and y of corner in km) ignore these for now
DX = delta X in km
DY = delta Y in km
CO = corner designation
The corner designation is a 2 letter code :
UL = Upper Left
LL = Lower Left
UR = Upper Right
LR = Lower Right
header format example:
# NX NY lat lon x y Dx Dy CO
-------------------------- EXAMPLE FILE INPUT -------------------------
# NX NY lat lon x y Dx Dy CO
R(1) G(1) B(1)
R(2) G(2) B(2)
R(NX*NY) G(NX*NY) B(NX*NY)
-------------------------- EXAMPLE FILE INPUT -------------------------
# 305 367 36.087334 -117.849266 0.000000 0.000000 0.030000 0.030000 UL
236 241 245
185 209 223
150 171 170
150 184 206
134 157 201
142 157 187
118 120 142
142 157 150
159 171 194
SEE ALSO
xmap8
xm_color
xm_hypo
xm_map
xm_menu
xm_origin
xm_points
xm_raster
xm_station
xm_well
xm_wire
xm_xsec
xm_ellipse
REFERENCES see article by J. M. Lees: Lees, J. M. (1995) Xmap8: Three-dimensional GIS for geology and geophysics, Seismological Research Letters: 66, 33-37.
Prof. Jonathan M. Lees
Yale Geology Dept.
P.O. Box 208109
New Haven, CT 06520-8109
(203)432-6947
lees@love.geology.yale.edu