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Boole Magnetic Declination Image Table Icon

Boole Magnetic Declination Image Table

Boole Embedded Systems
Trustable Ranking IconTerpercaya
1K+Unduhan
5.5MBUkuran
Android Version Icon4.0.1 - 4.0.2+
Versi Android
1.01(03-08-2020)Versi terbaru
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(0 Ulasan)
Age ratingPEGI-3
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Deskripsi Boole Magnetic Declination Image Table

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 - Versi 1.01

(03-08-2020)
Versi lain
Apa yang baruNow, there is a Compass presenting the Geographic True North and the Magnetic North.

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Boole Magnetic Declination Image Table - Informasi APK

Versi APK: 1.01Paket: appinventor.ai_antonio.Boole_Mag_Declination
Kompatibilitas Android: 4.0.1 - 4.0.2+ (Ice Cream Sandwich)
Pengembang:Boole Embedded SystemsKebijakan Privasi:https://boolesystems.com/privpolmobileappIzin:8
Nama: Boole Magnetic Declination Image TableUkuran: 5.5 MBUnduhan: 0Versi : 1.01Tanggal Rilis: 2020-08-03 12:21:58Layar Minimal: SMALLCPU yang Didukung:
ID Paket: appinventor.ai_antonio.Boole_Mag_DeclinationSHA1 Signature: 5F:70:4F:AD:AE:CA:3B:02:83:2F:8D:5F:55:77:C3:1E:D5:91:49:67Pengembang (CN): antonio@projetos.etc.brOrganisasi (O): AppInventor for AndroidLokal (L): Negara (C): USProvinsi/Kota (ST):

Versi Terakhir dari Boole Magnetic Declination Image Table

1.01Trust Icon Versions
3/8/2020
0 unduhan5.5 MB Ukuran
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