How to save a completed polygon points leaflet.draw to mysql table - mysql

Question

I would like to use leaflet.draw to create outlines of regions. I have managed to get this working ok: https://www.mapbox.com/mapbox.js/example/v1.0.0/leaflet-draw/
Now I'd like to save the data for each polygon to a mysql table. Am a little stuck on how I would go about exporting the data and the format I should be doing it in.
If possible I'd like to pull the data back into a mapbox/leaflet map in the future so guess something like geojson would be good.

Answer 1

So you could use draw:created to capture the layer, convert it to geojson then stringify it to save in your database. I've only done this once and it was dirty but worked.
map.on('draw:created', function (e) {
var type = e.layerType;
var layer = e.layer;
var shape = layer.toGeoJSON()
var shape_for_db = JSON.stringify(shape);
});

Answer 2

If you want to collect the coordinates, you can do it this way:
var drawnItems = new L.FeatureGroup();
map.addLayer(drawnItems);
map.on('draw:created', function (e) {
var type = e.layerType,
layer = e.layer;
drawnItems.addLayer(layer);
var shapes = getShapes(drawnItems);
// Process them any way you want and save to DB
...
});
var getShapes = function(drawnItems) {
var shapes = [];
drawnItems.eachLayer(function(layer) {
// Note: Rectangle extends Polygon. Polygon extends Polyline.
// Therefore, all of them are instances of Polyline
if (layer instanceof L.Polyline) {
shapes.push(layer.getLatLngs())
}
if (layer instanceof L.Circle) {
shapes.push([layer.getLatLng()])
}
if (layer instanceof L.Marker) {
shapes.push([layer.getLatLng()]);
}
});
return shapes;
};

Answer 3

map.on('draw:created', function (e) {
var type = e.layerType;
var layer = e.layer;
var shape = layer.toGeoJSON()
var shape_for_db = JSON.stringify(shape);
});
// restore
L.geoJSON(JSON.parse(shape_for_db)).addTo(mymap);

Answer 4

#Michael Evans method should work if you want to use GeoJSON.
If you want to save LatLngs points for each shape you could do something like this:
map.on('draw:created', function (e) {
var type = e.layerType;
var layer = e.layer;
var latLngs;
if (type === 'circle') {
latLngs = layer.getLatLng();
}
else
latLngs = layer.getLatLngs(); // Returns an array of the points in the path.
// process latLngs as you see fit and then save
}

Answer 5

Don't forget the radius of the circle
if (layer instanceof L.Circle) {
shapes.push([layer.getLatLng()],layer.getRadius())
}
PS that statement may not get the proper formatting but you see the point. (Or rather the radius as well as the point ;-)

Answer 6

Get shares as associative array + circle radius
map.on('draw:created', function (e) {
var type = e.layerType,
layer = e.layer;
if (type === 'marker') {
layer.bindPopup('Call Point!');
}
drawnItems.addLayer(layer);
var shapes = getShapes(drawnItems);
console.log("shapes",shapes);
});
var getShapes = function (drawnItems) {
var shapes = [];
shapes["polyline"] = [];
shapes["circle"] = [];
shapes["marker"] = [];
drawnItems.eachLayer(function (layer) {
// Note: Rectangle extends Polygon. Polygon extends Polyline.
// Therefore, all of them are instances of Polyline
if (layer instanceof L.Polyline) {
shapes["polyline"].push(layer.getLatLngs())
}
if (layer instanceof L.Circle) {
shapes["circle"].push([layer.getLatLng()])
}
if (layer instanceof L.Marker) {
shapes["marker"].push([layer.getLatLng()],layer.getRadius());
}
});
return shapes;
};

Answer 7

For me it worked this:
map.on(L.Draw.Event.CREATED, function (e) {
map.addLayer(e.layer);
var points = e.layer.getLatLngs();
puncte1=points.join(',');
puncte1=puncte1.toString();
//puncte1 = puncte1.replace(/[{}]/g, '');
puncte1=points.join(',').match(/([\d\.]+)/g).join(',')
//this is the field where u want to add the coordinates
$('#geo').val(puncte1);
});

Answer 8

For me it worked this:
after get coordinates send to php file with ajax then save to db
var drawnItems = new L.FeatureGroup();
map.addLayer(drawnItems);
// Set the title to show on the polygon button
L.drawLocal.draw.toolbar.buttons.polygon = 'Draw a polygon!';
var drawControl = new L.Control.Draw({
position: 'topright',
draw: {
polyline: true,
polygon: true,
circle: true,
marker: true
},
edit: {
featureGroup: drawnItems,
remove: true
}
});
map.addControl(drawControl);
map.on(L.Draw.Event.CREATED, function (e) {
var type = e.layerType,
layer = e.layer;
if (type === 'marker') {
layer.bindPopup('');
}
drawnItems.addLayer(layer);
shape_for_db = layer.getLatLngs();
SEND TO PHP FILE enter code hereWITH AJAX
var form_data = new FormData();
form_data.append("shape_for_db",shape_for_db);
form_data.append("name", $('#nameCordinate').val());
$.ajax({
url: 'assets/map_create.php', // point to server-side PHP script
dataType: 'text', // what to expect back from the PHP script, if anything
cache: false,
contentType: false,
processData: false,
data: form_data,
type: 'post',
success: function (php_script_response) {
var tmp = php_script_response.split(',');
alert(tmp );
}
});
});
map.on(L.Draw.Event.EDITED, function (e) {
var layers = e.layers;
var countOfEditedLayers = 0;
layers.eachLayer(function (layer) {
countOfEditedLayers++;
});
console.log("Edited " + countOfEditedLayers + " layers");
});
L.DomUtil.get('changeColor').onclick = function () {
drawControl.setDrawingOptions({rectangle: {shapeOptions: {color: '#004a80'}}});
};