# Converting EPSG:28992 to universal (Google Maps) lat/lon

I'm trying to find a way to convert EPSG:28992 to Google Maps' lat/lon using PHP. Is this possible?

I'm trying to convert XYZ: 137634.397 455715.439 0.0.

• You only want a solution in PHP? If yes, please update your question title and add PHP as a tag.
– Iris
Commented Sep 4, 2015 at 12:19
• note that google maps projection is a mercator projection. The most common Lat/long is WGS 84 (EPSG 4326) Commented Sep 4, 2015 at 13:11

Yes this can be done using http://proj4js.org/ you can find your parameters here http://spatialreference.org/ the rest is just code. I have a similar php script in a web page that converts from State Plane Coordinates into Lat/Long EPSG 4326. It basically follows this logic, ignore the extraneous stuff, that i think can be applied to your problem.

``````points = new Array();
noaa_points = new Array();
var p;
var thispoint;

Proj4js.defs["'.\$zone_id.'"] = "'.\$zone_vars.'";

var dest = new Proj4js.Proj("EPSG:4326");  /* Lat and Lon projection */
var source = new Proj4js.Proj("'.\$zone_id.'");

';

##############################

if (\$_REQUEST['n'] && \$_REQUEST['e']) {

echo '

p = new Proj4js.Point('.\$_REQUEST['e'].','.\$_REQUEST['n'].');
Proj4js.transform(source,dest,p);
points.push({num:1,north:"'.\$_REQUEST['n'].'",east:"'.\$_REQUEST['e'].'",zone:"'.     \$zone_name.'",elev:0,desc:"Single Converted      Point",lat:p.y,lng:p.x,noaalat:0,noaalng:0});
``````

QGis might also be helpful to convert between several projections. Once you can see your geometry as layer in Qgis, right click on the layer and select Export => Save Features As ... and select the wanted format.

This can be done using the Proj4PHP class which is a translation from Proj4JS. As follows:

``````// Initialise Proj4
\$proj4 = new Proj4php();

// Create two different projections.
\$projAmersfoort    = new Proj('EPSG:28992', \$proj4);
\$projWGS84  = new Proj('EPSG:4326', \$proj4);

// Create a point.
\$pointAmersfoortSrc = new Point(652709.401, 6859290.946, \$projAmersfoort);

// Transform the point between datums.
\$pointDest = \$proj4->transform(\$projWGS84, \$pointAmersfoortSrc);
``````