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| // Google Maps Key
// get a key here http://code.google.com/apis/maps/signup.html
gmap_key = 'KEY';
max_zoom_level = 17; //maximum value 17
// Variables required for calculating map
// No need to change these
var_pi180= '=pi()/180';
var_lat_offset= '0';
var_mc2= '=256*pow(2,$(var_zoom))';
var_mc1= '=256*pow(2,($(var_zoom)-1))';
var_mid_lat= '=min(LATITUDE)+(1+var_lat_offset)*((max(LATITUDE)-min(LATITUDE))/2)';
var_mid_long= '=min(LONGITUDE)+(max(LONGITUDE)-min(LONGITUDE))/2';
var_zoom= '=max(aggr(if(max( round(256*pow(2,(_zoom_level -1)))+( LONGITUDE *((256*pow(2,_zoom_level ))/360)) )-min( round(256*pow(2,(_zoom_level -1)))+( LONGITUDE *((256*pow(2,_zoom_level ))/360)) ) <map_size_x AND max((256*pow(2,(_zoom_level-1)))+((0.5*log((1+(sin((LATITUDE)*pi()/180)))/(1-(sin((LATITUDE)*pi()/180)))))*((-256*pow(2,_zoom_level))/(2*pi()))))-min((256*pow(2,(_zoom_level-1)))+((0.5*log((1+(sin((LATITUDE)*pi()/180)))/(1-(sin((LATITUDE)*pi()/180)))))*((-256*pow(2,_zoom_level))/(2*pi()))))<map_size_y,_zoom_level,1),_zoom_level))';
var_maptype= '=if(isnull(only(maptype)),fieldvalue( '&chr(39)&'maptype'&chr(39)&', 1 ),maptype)';
map_size_x= '800';
map_size_y= '600';
SET HidePrefix='_' ;
// Field required for calcualting best zoom level
_zoom_level:
Load RecNo( ) as _zoom_level autogenerate(max_zoom_level);
maptype:
LOAD * INLINE [
maptype
roadmap
mobile
satellite
terrain
hybrid
];
set hideprefix = 'maptype'; |
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