// Feature returns the Node as a *geojson.Feature.
func (n *Node) Feature() (f *geojson.Feature) {
// Set the properties.
properties := make(map[string]interface{}, 6)
properties["OwnerName"] = n.OwnerName
properties["Status"] = n.Status
if len(n.Contact) != 0 {
properties["Contact"] = n.Contact
}
if len(n.PGP) != 0 {
properties["PGP"] = n.PGP.String()
}
if len(n.Details) != 0 {
properties["Details"] = n.Details
}
if n.SourceID != 0 {
properties["SourceID"] = n.SourceID
}
// Create and return the feature.
return geojson.NewFeature(
geojson.NewPoint(geojson.Coordinate{
geojson.CoordType(n.Longitude),
geojson.CoordType(n.Latitude)}),
properties,
n.Addr)
}
func SpaceToFeature(space Space) *geojson.Feature {
infra := spaceToInfra(space)
lng := geojson.CoordType(infra.Point_.Lng)
lat := geojson.CoordType(infra.Point_.Lat)
c := geojson.Coordinate{lng, lat}
geom := geojson.NewPoint(c)
prop := map[string]interface{}{spaceValueName: infra.Value_, "createAt": infra.CreateAt_.Unix()}
return geojson.NewFeature(geom, prop, nil)
}
func EncodeMultiPointsIntoLineString(points []*Point) *geojson.Feature {
var coordinates = make(geojson.Coordinates, len(points))
for i := range points {
var c geojson.Coordinate
c[0] = geojson.CoordType(points[i].Lng)
c[1] = geojson.CoordType(points[i].Lat)
coordinates[i] = c
}
lineString := geojson.NewLineString(coordinates)
return geojson.NewFeature(lineString, nil, nil)
}
func EncodeMultiPointsIntoFeature(points []*Point) *geojson.Feature {
var coordinates = make(geojson.Coordinates, len(points))
for i := range points {
var c geojson.Coordinate
c[0] = geojson.CoordType(points[i].Lng)
c[1] = geojson.CoordType(points[i].Lat)
coordinates[i] = c
}
multiPoint := geojson.NewMultiPoint(coordinates)
return geojson.NewFeature(multiPoint, nil, nil)
}
/**
* or free docks, or an error if that was not possible.
* @see getFreeDocksNear
* @see getBikesNear
*/
func writeDockingStations(w http.ResponseWriter, r *http.Request, filter_type string) {
lat, _ := strconv.ParseFloat(r.URL.Query().Get("lat"), 64)
lon, _ := strconv.ParseFloat(r.URL.Query().Get("lon"), 64)
x0, _ := strconv.ParseFloat(r.URL.Query().Get("x0"), 64)
y0, _ := strconv.ParseFloat(r.URL.Query().Get("y0"), 64)
x1, _ := strconv.ParseFloat(r.URL.Query().Get("x1"), 64)
y1, _ := strconv.ParseFloat(r.URL.Query().Get("y1"), 64)
var dockingStations DockingStations
var err error
var ret []byte
if filter_type == "bikes" {
err = dockingStations.GetBikesNear(lat, lon, 4)
}
if filter_type == "freedocks" {
err = dockingStations.GetBikesNear(lat, lon, 4)
}
if filter_type == "stations" {
err = dockingStations.GetStationsInside(x0, y0, x1, y1)
}
if err == nil {
features := []*gj.Feature{}
for _, dockingStationStatus := range dockingStations.DockingStationStatuses {
properties := map[string]interface{}{"name": dockingStationStatus.Name, "i": dockingStationStatus.DockId, "bikes": dockingStationStatus.Bikes, "docks": dockingStationStatus.Docks, "updated": dockingStationStatus.Time}
lat, _ := strconv.ParseFloat(dockingStationStatus.Lat, 64)
lon, _ := strconv.ParseFloat(dockingStationStatus.Lon, 64)
p := gj.NewPoint(gj.Coordinate{gj.CoordType(lon), gj.CoordType(lat)})
f := gj.NewFeature(p, properties, nil)
features = append(features, f)
}
ret, err = json.Marshal(features)
}
if err != nil {
//@todo set return code
logger.Log("msg", "There was an error retrieving docking stations", "err", err)
w.Header().Set("Content-Type", "application/json")
w.Write([]byte("{msg: \"There was an error\"}"))
return
}
w.Header().Set("Server", "bikefinder")
w.Header().Set("Content-Type", "application/json")
w.Write(ret)
}
// isOtherGeo searches for non-standard geo data in the given json map. It looks for the presence
// of lat/lng (and a few variations thereof) or x/y values in the object as well as a distance/radius/accuracy
// field and creates a geojson point out of it and returns that, along with a boolean value
// representing whether or not it found any geo data in the object. It will also look for
// any keys that hold an array of two numbers with a key name that suggests that it might
// be a lng/lat array.
//
// The following keys will be detected as Latitude:
// "lat", "latitude"
// "y"
//
// The following keys will be detected as Longitude:
// "lng", "lon", "long", "longitude"
// "x"
//
// The following keys will be used to fill the "radius" property of the resulting geojson:
// "dist", "distance"
// "rad", "radius"
// "acc", "accuracy"
//
// The following keys will be searched for a long/lat pair:
// "geo"
// "loc" or "location"
// "coord", "coords", "coordinate" or "coordinates"
func isOtherGeo(o map[string]interface{}) (bool, *Geo) {
var foundLat, foundLng, foundDst bool
var lat, lng, dst float64
for k, v := range o {
switch strings.ToLower(k) {
case "lat", "latitude", "y":
lat, foundLat = v.(float64)
case "lng", "lon", "long", "longitude", "x":
lng, foundLng = v.(float64)
case "dst", "dist", "distance", "rad", "radius", "acc", "accuracy":
dst, foundDst = v.(float64)
case "geo", "loc", "location", "coord", "coordinate", "coords", "coordinates":
g, ok := v.([]float64)
if !ok || len(g) != 2 {
break
}
lng, lat = g[0], g[1]
foundLat, foundLng = true, true
}
}
if foundLat && foundLng && latIsValid(lat) && lngIsValid(lng) {
p := gj.NewPoint(gj.Coordinate{gj.CoordType(lng), gj.CoordType(lat)})
pstr, _ := gj.Marshal(p)
var geo map[string]interface{}
json.Unmarshal([]byte(pstr), &geo)
debugLog("Found other geo:", geo)
g := &Geo{
Geo: geo,
}
if foundDst {
g.Radius = dst
}
return true, g
}
return false, nil
}
func EncodePoint(point *Point) *geojson.Point {
var c geojson.Coordinate
c[0] = geojson.CoordType(point.Lng)
c[1] = geojson.CoordType(point.Lat)
return geojson.NewPoint(c)
}
// @todo genericize this processor to be a general-purpose *.shp processor
// and make it archive format-agnostic
func MTTurkeyProcessor(ds DataSource) (geoCol *geojson.GeometryCollection, err error) {
// download the source archive
fmt.Printf("Downloading %s...", ds.URL)
resp, err := http.Get(ds.URL)
if err != nil {
return nil, err
}
tmpZip, err := ioutil.TempFile(os.TempDir(), ds.Attribution+"_zip")
if err != nil {
return nil, err
}
n, err := io.Copy(tmpZip, resp.Body)
if err != nil {
return nil, err
}
resp.Body.Close()
tmpZip.Close()
fmt.Printf("done! (%d bytes)\n", n)
// search the zip file
fmt.Printf("Searching archive for %s files:\n", ds.Filetype)
r, err := zip.OpenReader(tmpZip.Name())
if err != nil {
return nil, err
}
defer r.Close()
shpMatcher := regexp.MustCompile(".*[.]shp$")
matched := false
// iterate through the files in the archive and process any .shp files
geoCol = geojson.NewGeometryCollection(nil)
for _, f := range r.File {
if !shpMatcher.MatchString(f.Name) {
continue
}
matched = true
fmt.Printf(">> Extracting %s...", f.Name)
shpData, err := f.Open()
if err != nil {
return nil, err
}
tmpSHP, err := ioutil.TempFile(os.TempDir(), ds.Attribution+"_shp")
if err != nil {
return nil, err
}
n, err = io.Copy(tmpSHP, shpData)
if err != nil {
return nil, err
}
shpData.Close()
tmpSHP.Close()
fmt.Printf("done! (%d bytes)\n", n)
// @todo remove this hack when the library authors remove theirs
// the shp library currently replaces the last three filename
// characters with "shp" for some reason...
err = os.Rename(tmpSHP.Name(), tmpSHP.Name()[0:len(tmpSHP.Name())-3]+"shp")
if err != nil {
return nil, err
}
fmt.Printf(">> Processing %s...", f.Name)
shape, err := shp.Open(tmpSHP.Name())
if err != nil {
return nil, err
}
defer shape.Close()
shapeCnt := 0
for shape.Next() {
_, p := shape.Shape()
bb := p.BBox()
//fmt.Printf("Adding %s: %s", reflect.TypeOf(p).Elem(), bb)
minX, maxX, minY, maxY := geojson.CoordType(bb.MinX), geojson.CoordType(bb.MaxX),
geojson.CoordType(bb.MinY), geojson.CoordType(bb.MaxY)
// @todo more correct and complete conversion from shp to geojson
// right now we're just deriving a square polygon from the bounding box
coords := []geojson.Coordinates{
// left line
{
{minX, minY},
{minX, maxY},
},
// top line
{
{minX, maxY},
{maxX, maxY},
},
// right line
{
{maxX, maxY},
{maxX, minY},
},
// bottom line
{
{maxX, minY},
{minX, minY},
},
}
poly := geojson.NewPolygon(coords)
geoCol.AddGeometry(*poly)
shapeCnt++
}
fmt.Printf("done! (loaded %d shapes)\n", shapeCnt)
}
if !matched {
return nil, fmt.Errorf("Could not find any %s files", ds.Filetype)
}
return geoCol, nil
}