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Leaflet: get layer in geojson with pixelcoordinates instead of latlng coordinates

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0

In my Angular 7 project with ngx-leaflet and leaflet 1.4.0 and leaflet-draw 0.4.14 I want to export each drawn rectangle (and circle,...) to geojson.
That works fine using

 public onDrawCreated(e: any) {

    const layerType = e.layerType;

    const layer = e.layer;

    const gj = layer.toGeoJSON();

// .... save gj

}

Now I also want to have the geoJSON with pixel coordinates instead of the latlng coordinates as they come from the layer.
So I suppose I need to execute a project on all coordinates using

this.map.project(ltlng, this.map.getMaxZoom()).round();

However: this.map.project returns a point object not a latlng object.
I tried to apply this conversion on the _latlngs property of the layer object, but obviously it does not work.
Should I do the conversion on the geoJSON object?
Any tips on how I can make this conversion work?

leaflet leaflet-draw

share

asked 4 mins ago

BenBen

1

New contributor

Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

0

In my Angular 7 project with ngx-leaflet and leaflet 1.4.0 and leaflet-draw 0.4.14 I want to export each drawn rectangle (and circle,...) to geojson.
That works fine using

 public onDrawCreated(e: any) {

    const layerType = e.layerType;

    const layer = e.layer;

    const gj = layer.toGeoJSON();

// .... save gj

}

Now I also want to have the geoJSON with pixel coordinates instead of the latlng coordinates as they come from the layer.
So I suppose I need to execute a project on all coordinates using

this.map.project(ltlng, this.map.getMaxZoom()).round();

However: this.map.project returns a point object not a latlng object.
I tried to apply this conversion on the _latlngs property of the layer object, but obviously it does not work.
Should I do the conversion on the geoJSON object?
Any tips on how I can make this conversion work?

leaflet leaflet-draw

share

asked 4 mins ago

BenBen

1

New contributor

Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

In my Angular 7 project with ngx-leaflet and leaflet 1.4.0 and leaflet-draw 0.4.14 I want to export each drawn rectangle (and circle,...) to geojson.
That works fine using

 public onDrawCreated(e: any) {

    const layerType = e.layerType;

    const layer = e.layer;

    const gj = layer.toGeoJSON();

// .... save gj

}

Now I also want to have the geoJSON with pixel coordinates instead of the latlng coordinates as they come from the layer.
So I suppose I need to execute a project on all coordinates using

this.map.project(ltlng, this.map.getMaxZoom()).round();

However: this.map.project returns a point object not a latlng object.
I tried to apply this conversion on the _latlngs property of the layer object, but obviously it does not work.
Should I do the conversion on the geoJSON object?
Any tips on how I can make this conversion work?

leaflet leaflet-draw

share

asked 4 mins ago

BenBen

1

New contributor

Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

 public onDrawCreated(e: any) {

    const layerType = e.layerType;

    const layer = e.layer;

    const gj = layer.toGeoJSON();

// .... save gj

}

this.map.project(ltlng, this.map.getMaxZoom()).round();

share

asked 4 mins ago

BenBen

1

New contributor

Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share

asked 4 mins ago

BenBen

1

New contributor

Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 4 mins ago

BenBen

1

New contributor

Ben is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 4 mins ago

BenBen

1