A chart overlay mentions to a issue or polyline that is supplemented on peak of the Google Map. Points (GPoint) are the most widespread kind of overlay and are mentioned to as markers (GMarker). Polylines (GPolyline), created of two or more points connected simultaneously by a vector line, can furthermore be supplemented to a map.
GPoint (-96.4523, 30.5356)
GPoint and GMarker are utilized in conjunction to conceive issue markers that can be contrived on a Google Map. An example of GPoint comprises a lone, two-dimensional coordinate, while GMarker is a kind of chart overlay that displays an icon at an example of GPoint.
GPolyline values two or more examples of GPoint to conceive a vector line between the two points. The vector lines developed by GPolyline can be conceived in diverse colors, weights, and transparency.
Google Map Polygons?
At this time, Google Map does not supply the proficiency to develop factual polygons, but I suppose that this will change in the beside future as the API becomes more robust. However, a third-party developer, XMaps, presents this functionality in its XMaps Library, which is a Google Map API Extension. This library is in pre-release and can be downloaded from their site.
Reading XML Files
Google Map furthermore encompasses the proficiency to download, open and read XML documents through the addition of the GXmlHttp class that conceives a cross-browser XmlHttpRequest instance. The significance of this proficiency often arrives into play when it becomes essential to read in multiple points of interest. You could shop your points of concern along with the coordinates that find those points in an XML document or auto-generate an XML document from the database where your points of concern are stored.
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