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- README.DIG USING DIGITIZERS FOR DRAWING MAPS!
- by Ken Swaggart W7KKE and WB4APR
-
-
- Having been laid off from work, I just spent two days adding many of the ideas
- that Ken W7KKE had included in his PLOTTER.bas program and incorporating them
- into MAPFIX.bas version 3.07B and later, so that you can see on the screen the
- map as you draw it using the CALCOMP or compatible digitizer! Most of the
- instructions on using the digitizer within MAPFIX are included in that program.
- But the following is a more detailed set of set up ideas and cautions..
-
- The program should work with any Digitizer that outputs individual POINT
- coordinates in the format XXX,YYY,C. Where XXX and YYY are ASCII numeric
- values from 3 to 5 digits in length, and C may contain ASCII characters
- indicating the status of the PEN, Mouse, or Buttons on the mouse. The
- digitizer should operate in the POINT mode, so that a data point is only
- output when the operator presses a button or puts the PEN to the digitizer
- surface. The characters included in C are only used, if they end with the
- numeral "3", which is the 4th button on a 4 button digitizer mouse. With this
- type of mouse, you can use button 1 for adding points (the default mode), or
- button 4 to move the cursor with no action...
-
- The program is set up to operate at 9600,N,8,1. If you are going to use the
- digitizer in MAPFIX, you must issue the ALT-O command to OPEN the COMM port
- for the digitizer. Once the plotter is initialized, entering a point with the
- digitizer will always ADD a new point immediately after the current point
- indicated by the small white circle. To BEGIN a new map feature with the
- Digitizer, use the ALT-B command. Then ADD points as just indicated.
-
- 1. Place a map, or map section, on the plotter. It should be a Mercator
- projection with lat and long lines parallel with edge of plotter. MAPFIX
- will calibrate itself with the location of the map, but the map must be
- alligned so that a LAT line gives the same Y reading on both sides of the
- digitizer surface.
-
- 2. MAPFIX aligns to the scale of the MAP by having you choose a lat/long
- in the vicinity of the upper left map corner and the lower right corner.
- These points are used to calibrate the plotter surface to the map. If your
- map is not a perfect MERCATOR, you can minimize the error by not choosing the
- extreme corners of the map, but choose points closer to your area of operation,
- say in the center of the upper left Quadrant and the center of the lower right
- quadrant.
-
- 3. Run the program. To start a NEW map from scratch, type NEW when asked for
- a map filename. You must then select the LAT/LONG of your origin for your map
- and a scale in Pixels-per-degree. Note that finer and finer resolutions make
- smaller and smaller maps since there is a limit to the data values stored for
- each data point. When asked for a LAT/LONG in decimal degrees, decimal
- fractions are fine. IE: 35.6 or 124.55, etc. When asked for LAT/LONG in
- degrees and minutes, separate the degrees and minutes with a COMMA such as
- DD,MM.xx where minutes can be entered with decimal fractions if needed.
-
- 4. Each map segment prompts for a segment name to ease in any debugging.
- Then just point to each position you wish to digitize. The program beeps and
- displays the converted data on the screen. After each point is added, any
- other MAPFIX command may be used. In otherwords, if you dont like a point
- that you just entered, just hit ALT-D to delete it, or ALT-M to MOVE it!
-
- 5. Add Labels to the map at any time by moving the cursor to the desired
- map location, and pressing ALT-L. Remember that the names are right justified
- so that the label will appear to the left of the point specified.
-
- 6. Remember to save your map occassionally using the Ctrl-S command. After
- each save, you can just continue on with the next point, or QUIT the program.
- If things get screwed up, hit the SPACE bar to re-draw the map. If they are
- still screwed up, consider saving the map, and using an EDITOR to check things
- out and fix them according to the definition of a map given in README.MAP.
-
- 7. To use the map in APRS, add the map file to your APRS directory, and then
- use an EDITOR to add the MAPNAME, center decimal coordinates, and range to
- the MAPLIST.MAP file. You may need to suppress some of the existing maps in
- the distro version of MAPLIST.MAP (by placing a * at the beginning of the map
- name) in order to keep the total number of active maps in your list below the
- 99 limit. Remember that you must place the new map in the proper order
- (more detailed maps must follow bigger maps that cover the same area) to get
- the right map to display when you have overlapping maps. While running APRS,
- if maps overlap, you can temporarily look at a map beneath a map by hitting the
- shift HOME key. Then remember to fix the order of the maps in your MAPLIST.map
- file later on to customize the list to your satisfaction.
-
-
- CALCOMP DRAFTING TABLE MODEL 23360 (Used by WB4APR):
- ----------------------------------------------------
- This digitizer is a stand-alone device with RS-232 output. Just use the on
- board menu labels and the mouse button 0 to configure the digitizer as
- indicated above and in the prompts within MAPFIX. I only set it up for 200 LPI
- since that is more than adequate. Plug in the serial port, run MAPFIX.bas and
- start drawing! Do not get too fussy with lots of dots, remember that there is
- a 1000 point limit in APRS, so don't waste points with fancy curves where three
- points will do!
-
-
- CALCOMP Model 4110 Plotter (Used by W7KKE):
- -------------------------------------------
-
- Plotting surface 12"x12" active, plastic surface is 12 3/4 x 12 3/4.
- Data is serial ASCII, even parity, with 4 characters of x position and 5
- characters of Y. W7KKE thinks the 1st Y character is pen status.
- (if so, he is gonna have to modify MAPFIX to make it work)
-
- Power input is pin 24 +12vdc at 290-300 ma. Pin 25 is power return.
-
- Data Ranges:
- X: 0 = left 4000 = right
- y: 0 = bottom 4000 = top
-
- Pen status: 0 = point mode 1 = run mode, pen down 9 = run mode, pen up
-
- There is an "A/B" switch on back of the plotter next to D25 plug. Run it in
- "B" which only sends a posit when pen is depressed on surface (point mode).
-
- Pin connections:
- 1 NC
- 2 +/- 15 v RS-232 data output from plotter.
- 3 + 5v from board (probably for some original interface device)
- 4 " " "
- 5 0/+5v TTL data output
- 6 " "
- 7 Ground (data return)
- 8 |
- 9 |- Tied together in various combinations to select baud rate.
- 10 |
- 11 |
- 12 - 23 Unknown. Appear to be open.
- 24 +12 vdc power input
- 25 ground
-
-
- BAUD RATE PROGRAMMING PINS:
-
- BAUD RATE 8 9 10 11 (X = connection to GND)
- 110 . . . .
- 2400 X . . .
- 1200 . X . .
- 150 X X . .
- 300 . . X .
- 200? X . X .
- 4800 . X X .
- OFF X X X .
- 150 . . . X
- 600 X . . X
- 45? X X . X
- 2400 . . X X
- 135? X . X X
- 9600 . X X X (use this for MAPFIX.bas)
- OFF X X X X
-
-