I found an address with the Mapbox Geocoding API. Then I want to highlight that building on the map.
It works in native, but does not in web. I want to have the point in the mapBox view for the renderedFeatures.
Something like this
pointInView = await map.getPointInView(foundAddress.center)
foundBuildings = await map.queryRenderedFeaturesAtPoint(pointInView)
How can I convert long,lat to the a point in mapbox-gl-js
Update
Found something helpful
How can I query the feature that's closest to the geocode result in Mapbox?
Found it, it's called project(LngLat)
pointInView = await map.project(foundAddress.center)
See: https://docs.mapbox.com/mapbox-gl-js/api/#map#project
Related
I am using mapbox geocoder to search for a location in one of my mapbox project. I am able to implement the search functionality successfully but I am having hard time in extracting the selected address by the user from the list of searched/suggested addresses.
Is there any way to get the coordinates of the searched place?
I went through mapbox docs but only found an event 'moveend' which is fired when we fly to some location. So I am listening for that event and once fired, I am calling getBounds() function on the map. It somehow works but it doesn't give me the exact coordinates since getBounds() gives the South West and North East coordinates of the box. Can we get the exact coordinates of the selected place?
Below is the code I am using to search for a place.
initMapSearch() {
var _this = this;
var geocoder = new MapboxGeocoder({ accessToken: environment.mapbox.accessToken, mapboxgl: mapboxgl });
this.locationObj = geocoder.onAdd(_this.map)
document.getElementById('geocoder').appendChild(this.locationObj);
}
And this is my moveend event.
this.map.on('moveend', function() {
_this.lat = _this.map.getBounds()["_ne"]["lng"];
_this.long = _this.map.getBounds()["_ne"]["lat"];
});
Thanks in advance to the community.
You should listen to geocoder.on('result') which is passed the feature (and its location).
Mapbox has a default geocoding feature called flyto. It zooms out of your current location pans across the map and zooms in on another location. This looks cool but it seems to run slow with a large data set. Is it possible to change the default geocoding feature to Jumpto instead of Flyto? I've noticed jumpto tends to load faster in other examples with large data.
See the API documentation https://github.com/mapbox/mapbox-gl-geocoder/blob/master/API.md there is a flyTo option you can set to false.
Disabling the flyTo will result in the map not moving at all. There is currently no way to make use of a jumpTo animation with the Geocoder Control but what you can do change the animation properties.
As per the documentation, the flyTo parameter accepts an AnimationOptions object as a parameter, where you can set the duration to 0.
const geocoder = new MapboxGeocoder({
accessToken: MAPBOX_ACCESS_TOKEN,
mapboxgl: mapboxgl,
flyTo: { duration: 0 }
});
This will make the animation instantaneous.
I know in the Google Earth client you can search for a placemark is there a way to implement this type of feature for the API. We have different placemarks that users would like to search then fly to.
Thanks
Yes, there are lots of ways to search for placemarks, really it would depend on how you have defined or created them.
For example, are they defined in a KML file, or created via the API? Also, do they have any abstract view defined, or are they simply based on point geometry?
One of the easiest ways would be to use the various accessors to find the placemarks. For example if the placemark has an ID you can use getElementById() and presuming the placemarks have an abstract view you can use that to look at, or fly to, it.
var placemark = ge.getElementById('MyPlacemark');
if (placemark.getAbstractView()) {
ge.getView().setAbstractView(placemark.getAbstractView());
}
Or else if you are loading KML by its URL, e.g.
// loaded via KML
var placemark = ge.getElementByUrl('http://yoursite.com/foo.kml#MyPlacemark');
if (placemark.getAbstractView()) {
ge.getView().setAbstractView(placemark.getAbstractView());
}
If the placemark doesn't have an abstract view you can still use the accessors to find the correct placemark and then extract the geometry from it to create the look at.
var placemark = ge.getElementByUrl('http://yoursite.com/foo.kml#MyPlacemark');
var point = placemark.getGeometry();
var lat = point.getLatitude();
var lng = point.getLongitude();
Without more information on how you have defined your placemarks it is pretty hard to be more specific.
what about KmlObjectList GEPlugin.getElementsByType?
I am using google api V3 in my iOS App,
I requested to google api direction service, by http GET method, I got a very large json response, I got many alternate routes from origin to destination, now I want to show the route of each alternative on map, how should I done this ? is there any need to integrate google sdk in iOS, or can i use webView only, please help me, and suggest the simplest way.
Thanks in advance
you do not need to include any google SDK to draw the route over map. Look at the following classes.
MKPolyline
MKPolyLineview
The google map api Direction service will give you the legs(coordinates) to draw the route between two specific points.
As you already have the json response from the Direction api now you have to parse the json and get all the legs point from the json to create Coordinate array.
Jsonkit for parsing
These points may be or mostly encripted. How to decode the Google Directions API polylines field into lat long points in objective-C for iPhone?
If you have the coordinates array then first you have to create a CLLocationCoordinate2D array like following:
CLLocationCoordinate2D *pointArr = malloc(sizeof(CLLocationCoordinate2D) * [your_CoordinateArray count]);
for(int i = 0; i < [your_CoordinateArray count]; i++){
pointArr[i] = [your_CoordinateArray objectAtIndex:i];
}
Then you have to add the polyline to your map
MKPolyline *line = [MKPolyline polylineWithCoordinates:pointArr count:[your_CoordinateArray count]];
if (nil != line)
{
[your_Map addOverlay:line];
}
Then you have to implement the following map delegate:
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
MKOverlayView* overlayView = nil;
lineView = [[MKPolylineView alloc] initWithPolyline:overlay];// lineView is an ivar, object of MKPolylineView
lineView.fillColor = [UIColor greenColor];
lineView.strokeColor = [UIColor greenColor];
lineView.lineWidth = 10.0;
lineView.alpha = 0.9;
overlayView = lineView;
return overlayView;
}
Now, if you want to show two different routes between two points then you have to create two different array of coordinates and apply the above method for both Arrays
Hope this will help you.
There is no need per say to integrate google sdk and you can simply use webView since I believe the webView gives you alternative views, but the user interface is much cleaner in the SDK than online. But at this moment, I don't believe the SDK allows other apps to show the alternative routes from what I've used of the new SDK. The code in maps.google.com is now considerably different from that in
the API and has access to different services. In particular, it has a large external module, mod_suggest.js, that doesn't exist in the API. But you may be able to implement it by
1) Throw the request at maps.google.com, and let it do the suggestions,
i.e. open a new browser window and pass it something like
http://www.google.com/maps?f=d&source=s_d&saddr=Jurong+West,+Singapore&da
ddr=Ang+Mo+Kio,+Singapore&hl=en
2) Just display the normal route and the avoid highways route.
3) Try to guess sensible waypoints to add in the middle of he route that
might lead to reasonable alternatives. That's not easy unless you have a
database of highways or highway intersections, and can look for such an
intersection that's somewhere between your start and end points (for
some approximate value of "between").
There may be problems using lat/lng coordinates for the waypoints,
particularly if there's a dual carriageway involved. If the coordinates
are for a point on the wrong carriageway, GDirections will drive a
considerable distance out of your way so that you visit the wrong side
of the road. But even using street names you may well get strange kinks
near the waypoints, like this:
from: Jurong West, Singapore to: Ayer Rajah Expy singapore to: Ang Mo
Kio, Singapore
Perhaps the only way to really deal with that is to include points on
both sides of a dual carriageway, and well clear of roads that cross
underneath or overhead, and then try to filter out the ones that are
silly.
Consider these examples
from: Jurong West, Singapore to: 1.32558,103.740764 to: Ang Mo Kio,
Singapore
from: Jurong West, Singapore to: 1.32582,103.740764 to: Ang Mo Kio,
Singapore
One of those adds 7 minutes to the trip by a complicated excursion to
visit the wrong side of the road.
Writing code to filter out silly routes isn't easy. As a first
approximation, you could discard routes that have estimated times that
are more than, say, 10% longer than the initial route. And you can also
compare the durations for pairs of points on opposite sides of a dual
carriageway and always discard the slower one.
Writing code to discard duplicate routes isn't easy either. For example,
a point on Bukit Timah Expy or Kranji Expy might create a route that's a
duplicate of Google's Seletar Expy suggestion.
You might want to look at: http://www.geocodezip.com/example_geo2.asp?waypts=yes&addr1=Jurong+West,+Singapore&addr2=Ang+Mo+Kio,+Singapore&waypt=Ayer+Rajah+Expy+singapore&geocode=1&geocode=2
But that may not be a legal implementation since the API does not allow it. Hope this helps.
i'm drawing polyline on MapView using "google direction API" and getting success in it.But the thing is that it draws straight line between two locations(with their longitude and latitude).I don't know how to draw line effectively like shown by google maps,when we click "get directions" between two locations.
I suggest taking a look at an SDK like CloudMade, this makes it very easy to implement custom maps and route's, you'll be able to draw a route between two locations within about 10 minutes of installing the SDK. Here is a quick example to get you started if you go down this route, excuse the pun.
CLLocationCoordinate2D initLocation;
initLocation.longitude = -0.127523;
initLocation.latitude = 51.51383;
CLLocationCoordinate2D destination;
destination.longitude = -0.125;
destination.latitude = 51;
TokenManager* tokenManager = [[TokenManager alloc] initWithApikey:#"YOUR API KEY"];
CMRoutingManager *routeManager = [[CMRoutingManager alloc] initWithMapView:mapView tokenManager:tokenManager];
[routeManager findRouteFrom:initLocation to:destination onVehicle:CMVehicleWalking];
You can find more information here in the documentation. Another alternative would be to use route-me which would allow you to choose from the following map sources:
OpenStreetMap, Microsoft VirtualEarth, CloudMade, OpenAerialMap, OpenCycleMap, SpatialCloud, and two offline, database-backed formats (DBMap and MBTiles)
Although personally i do not have any experience with route-me, so can't point you in the right direction to get started.
If you are adement on sticking with MKMapView, this blog post will get your started in the right direction.