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Boole Magnetic Declination Image Table Icon

Boole Magnetic Declination Image Table

Boole Embedded Systems
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Android ဗားရှင်း
1.01(03-08-2020)နောက်ဆုံး ဗားရှင်း
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အေသးစိတ္မ်ားျပန္လည္သံုးသပ္မႈမ်ားဗားရွင္းမ်ားအချက်အလက်
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Boole Magnetic Declination Image Table ၏ ရွင္းလင္းခ်က္

Touch a point at the world map and get Magnetic North Deviation.

When using a GPS position, the compass presents the True (geographic) North and the Magnetic North.

When pointed trough map, card is locked top, and the Arrow points to Magnet variation, the declination related to the geographic north.

An educational purposes application and is intended just for study the canvas behavior,

to use it as a table to query data from a bidimensional information source, using the MIT App Inventor framework.


The source code is available at:

http://ai2.appinventor.mit.edu/

and search for: Boole Magnetic Declination


The source of the data is the NOAA software obtained from: https://ngdc.noaa.gov/geomag/geomag.shtml


The world map with the declinations lines was obtained from https://www.ngdc.noaa.gov/geomag/magfield-wist/


Once a grid table Declination-89to90.csv has generated from the software wmm_grid.exe, ask for Declination information from -89 until +90 latitude, and from -179 until 180 longitude, 1 degree step, 2019 dated, at 3 km altitude, a png image has generate based on this PHP script:

$im = @imagecreatetruecolor(360,180)

or die("Cannot Initialize new GD image stream");


if ($i0) {

$r = intval(abs($i/32)) * 4 ;

$g = (abs($i) % 32) * 8;

}


printf( "creating color".$i."

\n");

${"color".$i} = imagecolorallocate ( $im, $r,$g,$b );

}


$row = 1;

if (($handle = fopen("Declination-89to90.csv", "r")) !== FALSE) {

while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {

$num = count($data);

echo "

$num campos na linha $row:

\n";

$row++;

for ($c=0; $c < $num; $c++) {

echo $c." > ".$data[$c] . "

\n";

}

$x = 179+$data[1];

$y = 89+($data[0]* (-1));

$color= "color".$data[2]*1;

echo "creating $im , $x , $y , $color

";

imagesetpixel ( $im , $x , $y , ${$color} );

}

fclose($handle);

}


imagepng($im, "Declination_image-89to90.png",0);


imagedestroy($im);


All links above was accessed at 14 October, 2018


At the application, the image above is used as Background image on the canvas, and dragging the finger at the canvas will point a pixel that is checked about its colors.


The Red and Blue are positive and negative deviations, and the green is the lower fraction of the value. As you can see at the source code


I expect you enjoy the application and more information or ideas can be sent to me by: antonio@boolesystems.com


Boole Magnetic Declination Image Table - ဗားရွင္း 1.01

(03-08-2020)
အျခား ဗားရွင္းမ်ား
ဘာအသစ္ရွိလဲNow, there is a Compass presenting the Geographic True North and the Magnetic North.

သုံးသပ္ခ်က္ သို႔မဟုတ္ အဆင့္သတ္မွတ္ခ်က္မ်ား မရွိေသးပါ။ ပထမဆုံး ျပဳလုပ္ရန္အတြက္ ကို ထည့္သြင္းေပးပါ။

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Boole Magnetic Declination Image Table - APK သတင္းအခ်က္အလက္

APK ဗားရွင္း: 1.01package: appinventor.ai_antonio.Boole_Mag_Declination
အန္းဒ႐ိုက္ ကိုက္ညီမႈ: 4.0.1 - 4.0.2+ (Ice Cream Sandwich)
ထုတ္လုပ္သူ:Boole Embedded Systemsကိုယ္ေရးလံုၿခံဳမႈ မူ၀ါဒ:https://boolesystems.com/privpolmobileappခြင့္ျပဳခ်က္မ်ား:8
အမည္: Boole Magnetic Declination Image Tableအရြယ္အစား: 5.5 MBေဒါင္းလုဒ္မ်ား: 0ဗားရွင္း : 1.01ျဖန္႔ခ်ိသည့္ ရက္စြဲ: 2020-08-03 12:21:58စခရင္အေသး: SMALLအေထာက္အပံ့ေပးနိုင္ေသာ စီပီယူ:
ပက္ေက့ဂ်္အိုင္ဒီ: appinventor.ai_antonio.Boole_Mag_DeclinationSHA1 လက္မွတ္: 5F:70:4F:AD:AE:CA:3B:02:83:2F:8D:5F:55:77:C3:1E:D5:91:49:67ထုတ္လုပ္သူ (CN): antonio@projetos.etc.brအဖြဲ႕အစည္း (O): AppInventor for Androidေဒသဆိုင္ရာ (L): နိုင္ငံ (C): USျပည္နယ္/ၿမိဳ႕ေတာ္ (ST): ပက္ေက့ဂ်္အိုင္ဒီ: appinventor.ai_antonio.Boole_Mag_DeclinationSHA1 လက္မွတ္: 5F:70:4F:AD:AE:CA:3B:02:83:2F:8D:5F:55:77:C3:1E:D5:91:49:67ထုတ္လုပ္သူ (CN): antonio@projetos.etc.brအဖြဲ႕အစည္း (O): AppInventor for Androidေဒသဆိုင္ရာ (L): နိုင္ငံ (C): USျပည္နယ္/ၿမိဳ႕ေတာ္ (ST):

Boole Magnetic Declination Image Table ၏ ေနာက္ဆုံးဗားရွင္း

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3/8/2020
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