Tutorial :Real-time Data Visualization using any Earth API


How to create something like on this video (1-2 minutes http://www.ted.com/index.php/talks/sergey_brin_and_larry_page_on_google.html) using "Google Earth API" or some other?

Especially: I have an online game and want to show dynamical data on some "virtual earth". 3 types of objects changing their state in real-time. It's enough to update each 5 seconds. I already have open api for it.

The problem is i do not know if it's possible to draw something like colored lines from a sphere's center and change them dynamically.

Sorry for an abstract question, but the goal is the same.


Well, if you're using the Google Earth API (requires that the Google Earth Plugin be installed), you can just create a bunch of extruded polygons. For example, if you go to the Earth API Interactive Sampler and paste/run this:

var lookAt = ge.getView().copyAsLookAt(ge.ALTITUDE_RELATIVE_TO_GROUND);  var lat = lookAt.getLatitude();  var lng = lookAt.getLongitude();    // first create inner and outer boundaries  // outer boundary is a square  var outerBoundary = ge.createLinearRing('');  var coords = outerBoundary.getCoordinates();  coords.pushLatLngAlt(lat - 0.5, lng - 0.5, 1000000);   coords.pushLatLngAlt(lat - 0.5, lng + 0.5, 1000000);   coords.pushLatLngAlt(lat + 0.5, lng + 0.5, 1000000);   coords.pushLatLngAlt(lat + 0.5, lng - 0.5, 1000000);     // create the polygon and set its boundaries  var polygon = ge.createPolygon('');  polygon.setExtrude(true);  polygon.setAltitudeMode(ge.ALTITUDE_RELATIVE_TO_GROUND);  polygon.setOuterBoundary(outerBoundary);    // create the polygon placemark and add it to Earth  var polygonPlacemark = ge.createPlacemark('');  polygonPlacemark.setGeometry(polygon);  ge.getFeatures().appendChild(polygonPlacemark);    // persist the placemark for other interactive samples  window.placemark = polygonPlacemark;  window.polygonPlacemark = polygonPlacemark;  

You'll see a 3D polygon extruded out of the globe.

There's much more you can do with this; I suggest playing with the Earth API and KML (foundation for geometry primitives in the Earth API) by visiting code.google.com/apis/earth and code.google.com/apis/kml.

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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