Need PHP coder to modify some code to draw me some maps please.

[Feek]

I'd like to be able to generate some maps using openstreetmap and PHP but I know smeg all about PHP to be able to do this.

The map I'd like to start with is this:



The "Permalink" for it is here:

http://www.openstreetmap.org/?lat=52...layers=B000FTF

I'd like to end up with a map similar to that shown on this page in that it will have the grid lines and square names overlaid.

I've been in touch with the guy whos site it is and he's provided me with some code.

This first bit is what he uses to overlay stations from his logbook.

define( "HOMELON", 4.4576 ); // longitude home in degrees north
define( "HOMELAT", 51.986 ); // latitude home in degrees east

/*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/
/*::                                                                         :*/
/*::  this routine calculates the distance between two points (given the     :*/
/*::  latitude/longitude of those points). it is being used to calculate     :*/
/*::  the distance between two zip codes or postal codes using our           :*/
/*::  zipcodeworld(tm) and postalcodeworld(tm) products.                     :*/
/*::                                                                         :*/
/*::  definitions:                                                           :*/
/*::    south latitudes are negative, east longitudes are positive           :*/
/*::                                                                         :*/
/*::  passed to function:                                                    :*/
/*::    lat1, lon1 = latitude and longitude of point 1 (in decimal degrees)  :*/
/*::    lat2, lon2 = latitude and longitude of point 2 (in decimal degrees)  :*/
/*::    unit = the unit you desire for results                               :*/
/*::           where: 'm' is statute miles                                   :*/
/*::                  'k' is kilometers (default)                            :*/
/*::                  'n' is nautical miles                                  :*/
/*::  united states zip code/ canadian postal code databases with latitude & :*/
/*::  longitude are available at http://www.zipcodeworld.com                 :*/
/*::                                                                         :*/
/*::  For enquiries, please contact sales@zipcodeworld.com                   :*/
/*::                                                                         :*/
/*::  official web site: http://www.zipcodeworld.com                         :*/
/*::                                                                         :*/
/*::  hexa software development center © all rights reserved 2004            :*/
/*::                                                                         :*/
/*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/
function distance($lat1, $lon1, $lat2 = HOMELAT, $lon2 = HOMELON) {

if (($lat1 == 0) || ($lon1 == 0))
// pech gehad voor iemand precies op de evenaar of 0-mediaan, maar het filtert goed:
{
  return -1;
}
$theta = $lon1 - $lon2;
$dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) +  cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($theta));
$dist = acos($dist);
$dist = rad2deg($dist);
$km = $dist * 60 * 1.852; // 60 minutes in 1 degree, 1852 meters in 1 nautical mile

if ($km > 3000)
  return -1; // quick hack voor foute configuraties
return $km;
}



function islocator( $locator )
{
  // checkt op een valide locator voor onze berekeningen
  $locator = strtoupper( $locator );
  return !!preg_match( "/^[A-R][A-R][0-9][0-9][A-X][A-X]$/", $locator );
}



function lon( $locator )
{
  // bepaal longitude van een locator
  if (!islocator( $locator ))
      return FALSE;
  $locator = strtoupper( $locator );
  $lon = -180 + 20 * (ord( substr( $locator, 0 ) ) - ord( 'A' ));
  $lon += 2 * (ord( substr( $locator, 2 ) ) - ord( '0' ));
  $lon += 5/60 * (ord( substr( $locator, 4 ) ) - ord( 'A' ));
  $lon += 5/60/2; // midden van locatorvak

  return $lon;
}



function lat( $locator )
{
  // bepaal latitude van een locator
  if (!islocator( $locator ))
      return FALSE;
  $locator = strtoupper( $locator );
  $lat = -90 + 10 * (ord( substr( $locator, 1 ) ) - ord( 'A' ));
  $lat += 1 * (ord( substr( $locator, 3 ) ) - ord( '0' ));
  $lat += 2.5/60 * (ord( substr( $locator, 5 ) ) - ord( 'A' ));
  $lat += 2.5/60/2; // midden van locatorvak

  return $lat;
}

// http://wiki.openstreetmap.org/wiki/Mercator
function y2lat($a)
{
  return 180/M_PI * (2 * atan(exp($a*M_PI/180)) - M_PI/2);
}
function lat2y($a)
{
  return 180/M_PI * log(tan(M_PI/4+$a*(M_PI/180)/2));
}


function qthdx( $locator1, $locator2 = 'JO21fx' )
{
  // bepaal afstand in kilometers tussen twee Maidenhead locators
  if (!islocator( $locator1 ) || !islocator( $locator2 ))
      return -1; // foute boel!

  if ($locator2 == 'JO21fx')
  {
      // blijkbaar afstand vanaf huis
      return round( distance( lat( $locator1 ), lon( $locator1 ),
                  HOMELAT, HOMELON ) );
  }
  else
  {
      return round( distance( lat( $locator1 ), lon( $locator1 ),
                  lat( $locator2 ), lon( $locator2 ) ) );
  }
}

I asked for the stuff which draws the grid lines and this is what he sent back.

This code should do the job, combined with the earlier supplied code. If you have any questions or need translations, let me know. The function expects a map name and the coordinates of its borders.
It loads the map, draws locatorgrid, put names in locatorsquares and draws concentric circles around the home QTH on the map.
NB The map needs to be in Mercator projection, which is the projection of the maps of Openstreetmap.

function maakaprsplot( $kaart, $lon1, $lat1, $lon2, $lat2 )
{
    // laadt kaart
    switch (strtolower( substr( $kaart, -3 ) ) )
    {
        case 'jpg':
            $pic = imagecreatefromjpeg( "images/" . $kaart );
            break;
        case 'png':
            $pic = imagecreatefrompng( "images/" . $kaart );
            break;
        default:
            return "Invalid picture: $kaart";
            exit( 1 );
    }
    $breedte = imagesx( $pic );
    $lengte = imagesy( $pic );
    $kleur = ImageColorAllocate( $pic, 0, 128, 0 );
    $aprsrechtstreekskleur = ImageColorAllocate( $pic, 0, 128, 0 );
    $aprsnietrechtstreekskleur = ImageColorAllocate( $pic, 128, 0, 0 );
    $aprsnietrechtstreekskleur = ImageColorAllocate( $pic, 255, 64, 64 );
    $cirkelkleur = ImageColorAllocate( $pic, 128, 128, 128 );
    $vakkleur = ImageColorAllocate( $pic, 128, 128, 128 );
    $achterkleur = ImageColorAllocate( $pic, 255, 255, 255 );
    $lonfactor = $breedte / ($lon2 - $lon1);
    $latfactor = $lengte / (lat2y( $lat2 ) - lat2y( $lat1 ));
    $lat1m = lat2y( $lat1 ); // corrigeer voor projectie

    // teken locatorvakken
    for ($lat = 0; $lat < 88; $lat += 1)
    {
        if ($lat > $lat1 && $lat < $lat2)
        {
            // valt binnen kaart
            $latr = $lengte - ($latfactor * (lat2y( $lat ) - $lat1m));
            imageline( $pic, 0, $latr, $breedte - 1, $latr, $vakkleur );
        }
    }
    for ($lon = -90; $lon < 90; $lon += 2)
    {
        if ($lon > $lon1 && $lon < $lon2)
        {
            // valt binnen kaart
            $lonr = $lonfactor * ($lon - $lon1);
            imageline( $pic, $lonr, 0, $lonr, $lengte, $vakkleur );
        }
    }

    // zet namen in locatorvakken
    for ($let1 = 'H'; $let1 <= 'L'; $let1++)
        for ($let2 = 'M'; $let2 <= 'Q'; $let2++)
            for ($cijf = 0; $cijf <= 99; $cijf++)
            {
                $vak = sprintf( "%s%s%02d", $let1, $let2, $cijf );
                $locator = $vak . "ll"; // midden in vak
// echo "|" . $vak . "|";
                $lon = round( (lon( $locator ) - $lon1) * $lonfactor );
                $lat = $lengte - round( (lat2y( lat( $locator ) ) - $lat1m) * $latfactor );
                imagestring( $pic, 3, $lon - 12, $lat - 7, $vak, $vakkleur );
            }

// echo "lon1 = " . $lon1 . " lon2 = " . $lon2 . " lat1 = " . $lat1 . " lat2 = " . $lat2 . " lengte = " . $lengte . " latfactor = " . $latfactor . "\n";
    // teken cirkels voor afstanden
    $homelon = round( (HOMELON - $lon1) * $lonfactor );
    $homelat = round( $lengte - ((lat2y( HOMELAT ) - lat2y( $lat1 )) * $latfactor) );
    $afstanden = array( 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, 2000 );
    $afstandfactor = 2 * $lengte / (111.12 * ($lat2 - $lat1)); // 111 km/breedtegraad http://wapedia.mobi/nl/Overleg:Breedtegraad
    imagefilledrectangle( $pic, $homelon - 1, $homelat - 1, $homelon + 1, $homelat + 1, $cirkelkleur ); // 0 km ook aangeven!
    for ($i = 0; $i < count( $afstanden ); $i++)
    {
        if (($cirkelgrootte = $afstanden[$i] * $afstandfactor) > 2)
        {
            imageellipse( $pic, $homelon, $homelat, $afstanden[$i] * $afstandfactor, $afstanden[$i] * $afstandfactor, $cirkelkleur );
            if ($cirkelgrootte > 40)
            {
                imagestring( $pic, 1, $homelon + ($afstanden[$i] * $afstandfactor / 2) + 2, $homelat, ($afstanden[$i]) . " km", $cirkelkleur );
            }
        }
    }

Who fancies having a bash for me?

[Daz]

Had a couple of attempts at doing something with this Feek but I'm not getting anyway - even with the necessary parameters, I just cant seem to get the code to execute properly. My lack of php knowledge I'm afraid

[Feek]

Thanks for looking, Daz.