// PathToGeoJSON ..
func (t Tracker) PathToGeoJSON(path []geo.Point) (string, error) {
fc := new(gj.FeatureCollection)
// Start marker
var p *gj.Feature
start := new(gj.Point)
start.Type = `Point`
c := new(gj.Coordinate)
c[0] = gj.Coord(path[0].Lng)
c[1] = gj.Coord(path[0].Lat)
start.Coordinates = *c
// Path line
var f *gj.Feature
line := new(gj.LineString)
line.Type = `LineString`
//var cordinates gj.Coordinates
for _, p := range path {
coord := new(gj.Coordinate)
coord[0] = gj.Coord(p.Lng)
coord[1] = gj.Coord(p.Lat)
line.AddCoordinates(*coord)
//cordinates = append(cordinates, *coord)
}
//line.AddCoordinates(cordinates)
fmt.Println(line.Type)
f = gj.NewFeature(line, nil, nil)
p = gj.NewFeature(start, nil, nil)
fc.AddFeatures(f, p)
fc.Type = `FeatureCollection`
geojson, e := gj.Marshal(fc)
return geojson, e
}
func makeFeaturefromRecord(r *Record) string {
var f *gj.Feature
lon := gj.Coord(r.Longitude)
lat := gj.Coord(r.Latitude)
p := gj.NewPoint(gj.Coordinate{lon, lat})
id := r.BusID
props := make(map[string]interface{})
props["BusName"] = r.BusName
props["RouteID"] = r.RouteID
props["TripID"] = r.TripID
props["TripHeadsign"] = r.TripHeadsign
props["Service"] = r.Service
props["LocationUpdated"] = r.LocationUpdated
f = gj.NewFeature(p, props, id)
gjstr, err := gj.Marshal(f)
if err != nil {
log.Fatal("geojson marshall failed", err)
}
return gjstr
}