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How to display a million points on the map, defined by latitude and longitude.

TMPTMP1

In swing java

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Accepted answers

BatbayarBazarragchaa

You had memory or performance issues displaying millions of points?

You can use GraphicLayer to display data with latitude and longitude.

// construct spatial reference

SpatialReference spatialReference = SpatialReference.create(102100)

// construct symbol

MarkerSymbol markerSymbol = new PictureMarkerSymbol(ImageLoader.loadImage("icons/triange_red.png"));

for (int i = 0; i < points; i++) {

Point point = GeometryEngine.project(longitude, latitude, spatialReference);
graphicsLayer.addGraphic(new Graphic(point, markerSymbol));

}

All comments

DanPatterson_Retired

If you need a visual representation, can you explain how you expect them to be distinguishable from one another?

TMPTMP1

Something like this.

DanPatterson_Retired

I would probably summarize the points based upon the underlying polygons, then return the centroid of that polygon with the count of the points attributed to each polygon used to symbolize the point. I presume that the image on the right wasn't done that way in an Arc* environment?

TMPTMP1

No.

I try it

AlexanderNohe1

I moved this from the Android location to the Java location as Swing is a Java technology.

BatbayarBazarragchaa

You had memory or performance issues displaying millions of points?

You can use GraphicLayer to display data with latitude and longitude.

// construct spatial reference

SpatialReference spatialReference = SpatialReference.create(102100)

// construct symbol

MarkerSymbol markerSymbol = new PictureMarkerSymbol(ImageLoader.loadImage("icons/triange_red.png"));

for (int i = 0; i < points; i++) {

Point point = GeometryEngine.project(longitude, latitude, spatialReference);
graphicsLayer.addGraphic(new Graphic(point, markerSymbol));

}

TMPTMP1

Performance issue,

Thanks for your answer.

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