I have a GPS device which populates data continuously. I need to show the movement on Google maps. Like for example user is moving from Phoenix to LA. I need show his movement with blue marker on google maps showing his movement along with path traveled.
Is it possible is there an Maps API that does it for me like: I keep pinging the new lat, long to Google maps. And google maps keep showing the advancing movement on the map.
You need to implement a LocationListener which will force you to implement 4 methods. One of those methods is the onLocationChanged this method, when your location changes will update and do something that you want. I guess you want to update and show your current location.
It is very important that you use requestLocationUpdates() and check this out:
http://developer.android.com/training/basics/location/locationmanager.html
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I have build employee location history tracking app in Ionic 4.
The process is as follows:
1- There is a service which fetches the current location after 5 second
2- Upload the fetched coordinates to database
But sometimes the location fetched is incorrect i.e 4-5 meters away from where the current employee is. I dont know why is this happening even though I am using accurate location fetching.
Anyway,
In admin panel, I draw the polygon on Google map from the coordinates which were saved.
As you can see the polygon and the whole track is quite weird.
Is there any way to draw the lines as we get in directions API?
Or something like trailing line drawn like this in life360 App.
I want the history locations to be drawn quite smoothly on maps instead of weird polygons line which doesnt bother the roads and paths
You can use the Directions API. Input all the points as waypoints and the response will contain an encoded polyline that will be on actual roads and look nicer than a polyline.
https://developers.google.com/maps/documentation/directions/
I used this Xamarin.Forms Map tutorial to create a simple app that displays a map and plots several points (from our database). The app works as it should, and that would normally be enough.
But I wanted to make my app different, and I wanted to use another type of map. For example, Waze and Google Maps both show me how to get to my nearest Walmart, but I like Waze's map more.
So my question is: what exactly does Xamarin.Forms.Maps display? It's a control that shows a map, but why does it show a Google Map instead of, say, a MapBox?
And since Google Maps and Waze are owned by the same company, why wouldn't I be able to display the Waze map instead of the Google Map?
Finally, what other map control options do I have? My app simply takes several coordinates from a sql table and plot the points in the map.
My requirement is, I have a set up of few IP cameras in a certain area. I have geo-location of each camera.All cameras are set-up in urban area. can I call these cameras on google-maps? is there any API for that ? i should get live feed, when I click on a particular camera .. Please help me
Google map not providing any API for controlling any type of hardware devices. If you want to control you have to set up everything yourself. Google map is an API for doing map or location operations like getting the latitude and longitude of a location, get the distance from one location to another, and a map view. In your case I don't think Google map can give any help.
You can start reading documentation of Google map from here
thats my scenario: I want to load a list of places of interest of a user based on his location (using HTML5 geolocation). But the problem is, I have a very big list of places (I don't want to have to load all places from my database), so the solution I have adopted until now is only to call mysql for the results in a given radius from the user, let's say, 1 km. But I'd like when user is dragging google maps to explore the map, load progressively the places for the area is shown on the map (basically something similar to what foursquare does).
Is there any simple way to achieve that? Hope I was clear with the question, thanks in advance, any help is appreciated.
Jesús.
General approach:
get the bounds of the map and query your data base for markers that are currently in view
optional, add padding to the bounds so some markers are available just out of view if the map is dragged
display the resulting markers
when the map is moved (bounds_changed event), query your database for additional markers
process through the returned markers, only adding those that are new (requires an array of existing markers and a way to determine that the existing marker and a newly downloaded marker are the same)
Searching the Google Maps API v3 group (and the Google Maps API v2 group, the concepts will apply but the code samples may not) should give you some examples.
I have a google maps application which displays markers based on data (lat,lon). As the user moves the map I have to refresh the data and show new points.
Now I am wondering to minimize the calls to the db, is there a way to refresh the data only if the map moved by certain % of the total span distance (ex: 15%). For example current maps show a distance of 1000km span, refresh the data only if the map moves horizontal/vertical by at least 150km.
Look at how the variable pixelThreshold is used on this old V2 mashup. It does the same thing but it works in all directions because in the moveend event handler I compare the distance between the map center before and after the move.
That is an API V2 application but it should be easy to apply the same strategy to a V3 application.