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- Version 7.9.5 MAP OVERLAYS
-
-
- APRS now has a MAPS-OVERLAYS command which can overlay any type of
- temporary data onto the maps. Each time you execute the command, the
- data file is read, and the objects are overlayed on the currently displayed
- map. You have the option of adding these objects to your P-List, so that
- they will remain on your maps as you zoom and drive... Because of the
- large volume of potential data, only a few files (*) are provided with the
- distribution copy of APRS as follows:
-
- *DIGIS.POS SHows all known APRS digis natiowide with range circles
- *GATES.POS Shows all known gates
- *FREQS.POS Shows all known APRS Frequencies
- *NWSPOSNS.POS SHows all NWS sites
- *STORES.POS Shows all nationally advertised Ham stores
- 2M-VOICE.POS Shows locations of wide area 2M voice repeaters
- WRECKS.POS Shows all CAP known crash sites. Important for SAR
- so that time is not wasted on old wreckages. There are
- several files CRASHE, W, SE, M, C, NW and CA.POS
- RSHACKS.POS Shows all Radio Shacks in the country
- ZIPS.POS Shows all Postal Zip codes. Get ZIPS1, 2, 3..., 9.POS
-
- Once you donwload these additonal files for your area, if you COPY just
- the file for your area to the generic filenames of RSHACKS, WRECKS and ZIPS,
- then you can see them from the menu directly with a single key stroke.
- Otherwise you will have to enter MAPS-OVERLAYS-OTHER-FILENAME to see them...
-
- If someone decides to combine all the files into single files (on big and
- fast machines) please do not name the original source file with the
- generic name, or it may be overwritten by someone elses customized file
- of the same name. That is also why the first line comment line appears
- when you load a file. This is so you can see whats really in the generic
- filenames. Keeping the files small for your area really speeds things
- up on older slow disk drives...
-
- THese files must be placed in your APRS\POS directory. You can make
- these POS files for your own area limited only by your imagination. A
- file of all VOICE repeaters is important for the traveler. Use the freq
- as the callsign so that it shows on the map. Or you can make a .POS file
- of all your club members so that you can visualize your net.
-
- FORMAT: The format is simple. Each line consists of a NAME up to 9
- characters (variable length) followed by the normal FIXED station
- APRS position format beginnning with an exclaimation point. You MUST
- also add a single line descriptive comment at the beginning that will be
- displayed to the user when he executes the OVERLAY command. If you omit
- this first line, then the first line of data will be used as the
- comment line and it will not be plotted... Have fun!
-
- BUILDING FILES: THis is easy. Just use APRS. Use the INPUT-ADD command
- to add as many objects to the map as you want. When you are finished,
- do a FILE-SAVE. Then load the file into a text editor and delete all
- of the date/times between the end of the object name and the beginning
- of the latitude. Replace all this with just the exclaimation point (!).
- Then save the file as a .POS file in your .POS directory.
-
- Do not worry about exact lat/longs. Just use your eyeball on the most
- detailed APRS map that you have. The exact location will never matter,
- since anyone who is viewing the overlay data will be using the SAME
- map to VIEW it as you did to estimate the position in the first place.
- As you get more detailed maps, or as someone visits the site with a GPS,
- then clearly the posits must be updated. But you can do that later...
-
-