Example of an Overlay File

; This is a sample overlay to demonstrate the overlay features.
; Put this in ${IRIS_ROOT}config/overlay and call it sample.ovr 
;
; The semicolon ";" is used at the beginning of comment lines.
;
; All distances are in arbitrary "map units" with coordinate points
; denoted with E-W first and N-S second. See overlay description.
;
PROJECTION AED
; The scale factor in km per "map unit":
SCALE 1.000
;
; The radar location in map units:
RADAR 0 0
REFERENCE -71.100 42.400
;
FILL_CENTER -71.100 42.400
DRAW_CENTER -71.100 42.400
; Next come the text strings:
; First the text size (Height in pixels, range 7 through 25)
SIZE 16
;
; Next the text justification (left, center or right)
SCN_CENTER
;
; Then the text location and text string (E-W first, N-S second)
HIGHLIGHT
TEXT 5000 8450 Examples
TEXT 5000 8000 Of
TEXT 5000 7550 Text
;
; Here are font and justification examples for many sizes
; First do the size 7
SIZE 7
RIGHT
TEXT -150 85 7Right
; The two lines above cause the text "7Right" to be positioned with
; its right at map unit position (250, 350).
CENTER
TEXT -150 70 7Center
; For center, there is no position dot and text "7Center" is centered
; at the specified location.
LEFT
TEXT -150 55 7Left
; For left, the dot is to the left of the text "7Left"
;
SIZE 9
RIGHT
TEXT -50 90 9Right
CENTER
TEXT -50 70 9Center
LEFT
TEXT -50 50 9Left
;
; Now change the size to 10 and repeat the examples:
SIZE 10
RIGHT
TEXT 50 95 10Right
CENTER
TEXT 50 70 10Center
LEFT
TEXT 50 45 10Left
; Now change the size to 13 and repeat the examples:
SIZE 13
RIGHT
TEXT 150 100 13Right
CENTER
TEXT 150 70 13Center
LEFT
TEXT 150 40 13Left
; Now change the size to 16:
SIZE 16
RIGHT
TEXT -150 -35 16Right
CENTER
TEXT -150 -70 16Center
LEFT
TEXT -150 -105 16Left
SIZE 20
RIGHT
TEXT -10 -30 20Right
CENTER
TEXT -10 -70 20Center
LEFT
TEXT -10 -110 20Left
SIZE 25
RIGHT
TEXT 130 -25 25Right
CENTER
TEXT 130 -70 25Center
LEFT
TEXT 130 -115 25Left
;
; Here is a message in the lower left corner of the screen
SIZE 13
SCN_LEFT
TEXT 200 200 File:sample.ovr
; And finally the points for the map lines in map units:
; Example of a small rectangle to enclose text examples:
; E-W first, N-S second.
-230 -180
-230 180
230 180
230 -180
-230 -180
GAP
; The word "gap" above is used to denote the last point of a map line.
;
; To start another map line, continue entering map coordinates and
; put "GAP" after the line is complete.
;
; Put "END" at the end of the file. Note that it is sometimes
; helpful during editing to put "END" in the middle of a file
; so that overlay will only plot the map lines and text up to
; that point.
;
; Here is a large rectangle around everything:
-250 -250
-250 250
250 250
250 -250
-250 -250
; Here are some underlay fill points. These points are used to start a
; region fill, and should be spaced about the area of concern.
RANGE 0
FILL_COLOR underlay2
FILL -240 -200
FILL -240 -100
FILL -240 50
FILL -240 150
;
FILL 240 -150
FILL 240 -50
FILL 240 50
FILL 240 150
FILL_COLOR underlay3
FILL -50 -50
END
; End of SAMPLE