sma - Spline map

Name

sma — Spline map

Syntax

Description

Contour lines are drawn using spline curves to achieve smooth contours.

Arguments

Main contouring arguments:

Note that the main contouring arguments are the same for other shell commands that contour in various ways.

i incr

incr is the increment value.

v val1 [val2 val3 ...]

Contour at specific values, val1, val2, ...

s start increment stop

s for step needs three numbers: start, increment and stop The first and last contour will be at start and stop.

n number

Use number contours (levels), equally distributed between the minimum and maximum value.

ms start1 incr1 stop1 start2 incr2 stop2

ms for multiple steps needs six following numbers. The first contour will be at start1, the last at stop2.

l

Use levels from the last previous contouring operation.

auto

Automatic selection of appropriate contour intervals.

cur

Use contour level from cursor position. Mark a cursor position on a map with key letter y.

Other arguments:

sav [nodraw]

Will save the contours in active and in workspace under the name ^con which is not directly visible. If the sav argument is used in a command menu which restores the original active data, the user must make it active by mlo ^con.
The nodraw argument prevents the contours to be drawn on the screen.

smo

Smoother contouring using b-splines.

can [frq] [dis] [hi] [anl] [csl] [ant] [ans]

Carthographic annotation.
frq factor - Multiply the frequency counter with factor. 
dis distance - Annotate for every distance distance. 
hi workspacename - Annotate where contours are crossing lines in workspace workspacename. 
anl n | shf - Annotation levels every n'th contour / on color highlighted (color shifted) contours. 
shliw n - Shift linewith to n for highlighted contours. 
csl color - Color select for number annotation. color is red/gre/bla/... 
ant factor - Extended annotation testing. factor lower than 0.1 will be more restrictive. factor greater than 0.1 will give more annotation. 
ans factor - Annotation size factor setting relative to 1.
dec number_of_decimals - Specify number of decimals for annotation numbers. Default is 2 and is applied if annotation numbers have decimals.

numsize factor

Size factor of annotation numbers relative to 1.

csh inc

Color shift. Highlights contours on increment inc.

flat z_level

Contour in a plane at level z_level.

nrg

No regridding for large grids. Gives a more detailed display.

map

Use colors from the map color table on the contours.

eli number

Eliminate small contours with number of points less than number.

noadj

The contours will, by default, be lifted up (or adjusted) a little bit for better visualization. This can be prevented with the noadj argument.

all

Will display all contours even when in 2D mode and the grid is outside the window.

Examples

Ex.1: Spline mapping

# 3d annotation is very different from 2d annotation.
z                    ;# erase display
win 450000 460000 6450000 6460000 1500 3000 ; # get a new window by coordinates
mak ran 12           ;# make random points
grp 110 110          ;# make grid
bol tub              ;# draw border line n tube mode
acm i 250            ;# color band contours
spe col con bla blu  ;# contour colors are black and blue
spe col ann bla      ;# annotation color is black
sma i 50 csh 250 ann anl shf shliw 3 frq 0.9 ans 1.5; # spline map with annotation

The above example produces this image (somewhat zoomed) using the random generated grid in active data as input.

Spline map with annotation

See also

acm - Color band mapping , ann - Simple annotation , con - Contour using scalars , lco - Line color , map - Map display