Lat/long from eastings & northings v4 about phpcoord HOT 6 CLOSED

You beat me to the edit, you were right i had the wrong way round!

I think this would be a great addition to the documentation under the section this page as that's where I went to instinctively, thanks again! 😄

from phpcoord.

Hello

For lat/long you want a Geographic CRS (see https://www.phpcoord.net/en/stable/creating_points_geographic.html)

$toCRS = Geographic2D::fromSRID(Geographic2D::EPSG_WGS_84); GPS/Google maps
$to = $from->convert($toCRS);

or

$toCRS = Geographic2D::fromSRID(Geographic2D::EPSG_OSGB36); // OS maps, also Bing I think
$to = $from->convert($toCRS);

from phpcoord.

Actually https://www.phpcoord.net/en/stable/primer.html#coordinate-reference-systems-crss might be a better page in the docs to explain the different CRS types

from phpcoord.

Thanks for the fast response! If I run the following;

require __DIR__ . "/vendor/autoload.php";
use PHPCoord\CoordinateReferenceSystem\Projected;
use PHPCoord\ProjectedPoint;
use PHPCoord\UnitOfMeasure\Length\Metre;
use PHPCoord\CoordinateReferenceSystem\Geographic2D;

$from = ProjectedPoint::createFromEastingNorthing(
    new Metre(92041),
    new Metre(409722),
   Projected::fromSRID(Projected::EPSG_OSGB36_BRITISH_NATIONAL_GRID)
);
$toCRS = Geographic2D::fromSRID(Geographic2D::EPSG_WGS_84); //GPS/Google maps
$to = $from->convert($toCRS);
echo $to;

I get

 Unable to perform conversion, please file a bug if you think this is incorrect

from phpcoord.

    new Metre(92041),
    new Metre(409722),

I think you've got eastings/northings swapped 🤞

from phpcoord.

Awesome, had me worried for a second as I'm the UK too and I know that conversion is supposed to work...

That's a good suggestion about the docs, I'll add a projected->geographic example to it.

from phpcoord.