[aprssig] Simple mapping - NMEA

[Andrew Rich]

hey thats really cool

thanks


  ----- Original Message ----- 
  From: Stephen H. Smith 
  To: TAPR APRS Mailing List 
  Sent: Tuesday, April 19, 2011 3:26 PM
  Subject: Re: [aprssig] Simple mapping - NMEA


  On 4/18/2011 8:13 PM, Andrew Rich wrote: 
    Hello

    Going on a boat - have road maps but no internetr access

    What is the best option ? Maybe jsut record NMEA and convert when i get back ?

    Need a simple mapping solution - made up a map for UI-VIEW

    Coral sea - east of Australia



   

  Use UIview as a "map player" rather than as an APRS client.    Any map image (scanned/photographed with a high-res digital camera/downloaded from the Internet) in GIF, BMP or PNG format with a pair of known lat/long calibration points on it can be displayed inside UIview. You can cause a cross-hairs to be displayed at your own position from a local GPS.   

  A useful tool to download already calibrated images from Google Maps, Yahoo Maps or Microsoft Bing is "Universal Maps Downloader".  This shareware utility can download any number of map images to cover a specified lat/long-bounded box, and then stitch them together to form a far larger single image, ready to use in UIivew.  You can create images far larger than the small window you see online on Google and Yahoo maps.  I have created large-area hi-res maps that involved over a thousand tiles!

  UIview can handle images far larger (in terms of pixels) than the size of the window displaying them on your PC.   UIview then becomes a scrollable viewport showing part of a far larger image.       I have used maps of over 2500 x 3500 pixels in UIview.  The key is to reduce the number of colors in the image to only 256 or even 16 colors.      

  A review of "Universal Maps Downloader" with many samples is here on my website:

  .     <http://wa8lmf.net/MapCaptureTool>


------------------------------------------------------------------------------

  --

  Stephen H. Smith    wa8lmf (at) aol.com 
  EchoLink Node:      WA8LMF  or 14400    [Think bottom of the 2M band]
  Skype:        WA8LMF
  Home Page:          http://wa8lmf.net

  =====  Vista & Win7 Install Issues for UI-View and Precision Mapping =====
      http://wa8lmf.net/aprs/UIview_Notes.htm#VistaWin7

  *** HF APRS over PSK63 ***
     http://wa8lmf.net/APRS_PSK63/index.htm

  "APRS 101"  Explanation of APRS Path Selection & Digipeating 
    http://wa8lmf.net/DigiPaths 





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