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Almathera Ten Pack 3: CDPD 3
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Almathera Ten on Ten - Disc 3: CDPD3.iso
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fish
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701-725
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719
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drawmap
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drawmap.lha
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drawmap.help
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1992-08-20
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12KB
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258 lines
Aitoff: This item generates a polyconic projection of the
entire Earth's surface. It features equidistant spacing of
parallels, and was first described in 1889. The center of the
view will be at the currently-selected center point.
Boundaries: These six toggle switches indicate which items are
to be included in the maps, namely: coastlines, country
boundaries, U.S. state boundaries, islands, lakes and rivers.
A checkmark by an item indicates that the item is to be
included.
Boundary Colors: These items allow the user to select the
color in which each boundary item will be drawn. Each boundary
item (e.g., coastlines, lakes, etc.) may be drawn in a
different color.
Box: This item generates a "flat" map of any portion of the
Earth's surface that lies inside a user-selectable rectangular
region on a flat or Mercator map. If a flat map is not
currently being displayed, then a flat map is first displayed.
The user selects the rectangular region by first pressing the
left mouse button to select one vertex of the rectangle,
dragging the mouse to define the box, then releasing the left
mouse button when the desired area has been selected. The user
may also cancel this entire selection by pressing the right
mouse button before initially pressing the left mouse button.
Note that, if the selection is canceled, then the center point
for subsequent selections will be at 0 degrees latitude and 0
degrees longitude unless the user selects another center point.
Box Zoom In: This item may only be used after the user has
previously selected either the Box, Box Zoom In or Box Zoom Out
items. This item allows the user to select a rectangular box
within the currently-displayed box for closer inspection,
thereby further expanding the view of that smaller box. The
smaller box is selected as described in the Help entry for the
Box item. The user may cancel this selection by pressing the
right mouse button before initially pressing the left mouse
button.
Box Zoom Out: This item may only be used after the user has
previously selected either the Box, Box Zoom In, or Box Zoom
Out items. Selecting this item causes the limits (both
latitude and longitude) of the currently-displayed box to be
increased by a factor of 2, and all regions within that larger
box are then displayed.
Clear Screen: This item causes the entire screen to be cleared
to the default background color (blue).
Detail Level: This item indicates how much detail the maps are
to include (e.g., high, low, etc.). The more detail, the more
time required to draw the maps.
Display Center: This item displays in the title bar the
current values for the latitude and longitude of the center
of the map.
Draw Line: This item allows the user to draw a connected line
by first pressing and holding down the left mouse button, and
then moving the mouse while continuing to hold down the left
mouse button. Releasing the left mouse button terminates the
line drawing function. The user may cancel this selection by
first pressing the right mouse button before pressing the left
mouse button.
Flat: This item generates a simple, "flat" map of the entire
Earth's surface. This map features equidistant spacing of
parallels. Also known as a cylindrical equidistant projection,
it is attributed to Anaximander, c. 550 B.C. The center of the
view will be at the currently-selected center point.
Flood Color: This item allows the user to select the color to
be used in color-filling regions. The color is selected by
releasing the right mouse button over the desired color. The
currently-selected color is indicated by a check mark.
Flood Fill: This item causes a contiguous area to be color
filled. Pressing the left mouse button results in the area
underneath the mouse being color-filled with the color selected
for color-filling (see the Help entry for the Flood Color item).
The color of all contiguous points of the same color as the
point under the mouse is changed to the flood-fill color. The
user may cancel this item by pressing the right mouse button.
Gall: This item generates Gall's stereographic cylindrical
projection of the entire Earth's surface. This projection was
first described in 1855. The center of the view will be at the
currently-selected center point.
Globe: This item generates a plot of an entire hemisphere of
the Earth's surface, i.e., that part of the globe that would be
visible if seen from infinitely far away, but with a very
powerful telescope. The center of the view will be at the
currently-specified center point. This is more commonly called
an orthographic projection, and is attributed to Apollonius,
c. 240 B.C.
Grid: This item generates grid lines on the type of map
currently being displayed. The only maps on which grid lines
may not be drawn are the box, box-zoom-in, and box-zoom-out
maps.
Hammer-Aitoff: This item generates a Hammer-Aitoff projection
of the entire Earth's surface. It is an equal-area, polyconic
projection with decreasing separation of parallels. It was
first described in 1892. The center of the view will be at the
currently-selected center point.
Help: Selecting this item results in a window appearing, with
a gadget labelled for each menu item. Pressing the left mouse
button on a particular gadget results in a display of the Help
entry for that particular menu item. Pressing the left mouse
button on the OK gadget terminates the display of the Help
entry for that menu item. Pressing the left mouse button on
the Exit Help gadget terminates the Help function.
Lambert: This item generates a Lambert cylindrical equal-area
projection of the entire Earth's surface. This projection was
first described in 1772. The center of the view will be at the
currently-selected center point.
Line Color: This item allows the user to select the color to
be used for drawing lines. The color is selected by releasing
the right mouse button over the desired color. The
currently-selected color is indicated by a check mark.
Mercator: This item generates a standard Mercator projection
of the entire Earth's surface. This projection was used by
Mercator in 1569, and described by Wright in 1599. The center
of the view will be at the currently-selected center point.
Mollweide: This item generates a pseudo-cylindrical,
equal-area projection of the entire Earth's surface. It is
attributed to Mollweide, was first described in 1805, and
features decreasing separation of parallels. The center of the
view will be at the currently-selected center point.
New Center: This item allows the user to select a point to be
the center of subsequent maps. If the map currently displayed
is not a flat map, then a flat map is blittered onto the screen.
A grid is displayed, and the user may either select a new
center point by pressing the mouse select button over the
desired point or cancel the item by pressing the right mouse
button.
Orbital: This item generates a plot of the Earth's surface as
seen from a user-selectable altitude. The center of the view
will be at the currently-specified center point. A requester
is presented which prompts the user to enter an altitude from
which to view. Note that the entire visible portion of the
Earth's surface is plotted, no attempt being made to clip the
visible portion to a user's hypothetical window as seen from an
orbiting spacecraft. This results in a sort of "fish-eye"
effect, but it does show the entire portion of the globe
visible from that altitude.
Palette: This item gives the user full control over the entire
palette. A window is opened showing the current palette,
slider bars and RGB values which can be directly modified.
Any or all colors may be modified, the resulting color changes
being immediately reflected on the screen.
Print Map: This item causes the currently-displayed map to be
printed on the printer specified in the user's standard Amiga
Preferences file.
Quit: This item causes the program to clean up after itself
and terminate.
Recenter: This item causes the center point of subsequent maps
to be at 0 degrees latitude and 0 degrees longitude.
Redraw: This item causes the last map drawn to be redrawn.
This is useful, for example, when one changes the detail level
and wants to see the same map drawn at the new detail level.
Reset Colors: This item causes the default palette (and NOT
the user's personal palette in the "drawmap.config" file) to be
loaded. The colors on the displayed screen are immediately
modified.
Sanson-Flamsteed: This item generates a pseudo-cylindrical,
equal-area projection of the entire Earth's surface. It is
attributed to Sanson and Flamsteed, was first described in
1606, and features equidistant separation of parallels. The
center of the view will be at the currently-selected center
point.
Save Config: This item causes the user's palette to be saved
into a file named "drawmap.config". When the program is next
executed, it looks for this file and, if found, loads the
palette contained therein.
Save Map: This item allows the user to save to disk the
currently-displayed map. A file requester is first displayed
as a prompt to the user to select a file name, after which the
map is saved as a standard IFF file. It may then be displayed
by any well-behaved IFF display program or loaded into any
normal paint program.
Shadow: This item causes drop-shadows to be generated on the
currently-displayed map. The only colors for which shadows are
not generated are "black" and the background "blue".
Simple Polyconic: This item generates a simple polyconic
projection of the entire Earth's surface. It features
equidistant spacing of parallels, and was first described in
1855. The center of the view will be at the currently-selected
center point.
Slide: This item allows the user to select a point on the
equator to be the center of subsequent maps. If the map
currently displayed is not a flat map, then a flat map is
blittered onto the screen. A grid is displayed, and the user
may either select a new center point by pressing the mouse
select button over the desired point or cancel the item by
pressing the right mouse button. The selected center point is
then constrained to lie on the equator by forcing the latitude
to zero.
Text: This item allows the user to enter text and place it
anywhere on the screen. A text requester is displayed, into
which any desired text may be entered. Pressing the "return"
or "enter" key terminates the requester, and a box (of size
equal to the size of the specified text) is displayed at the
mouse position. The user then positions the text by moving the
mouse. Pressing the left mouse button stamps down the
specified text onto the currently-displayed map. Pressing the
right mouse button cancels the selection (i.e., no text will be
stamped down).
Text Color: This item allows the user to select the color to
be used for user-specified text. The color is selected by
releasing the right mouse button over the desired color. The
currently-selected color is indicated by a check mark.
Toggle Title: This item causes the screen title bar to be
alternately turned on or off.
Zoom In: This item generates an Orbital view as seen from
one-half the previous orbital altitude. The center of the view
will be at the currently-selected center point. If no previous
Orbital view had been generated, then the altitude is one-half
the initial, default altitude of 300 kilometers. The user may
cancel this item by pressing the right mouse button.
Zoom Out: This item generates an Orbital view as seen from
twice the previous orbital altitude. The center of the view
will be at the currently-selected center point. If no previous
Orbital view had been generated, then the altitude is twice the
initial, default altitude of 300 kilometers. The user may
cancel this item by pressing the right mouse button.
Exit Help: This selection terminates the Help function.