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In google maps javascript api - how to move map not marker

currently i have a little project that needs to make marker static and move map to the marker display on the map - i hope it makes any sense -
how to move map not marker - like i said the marker cannot move but the map needs to move to the marker when location changed - also marker is displayed at the bottom the map to make room for other events above the marker such as a path display and etc -
whats done already is when car moves it watches gps - then tells marker to move to that gps as a current location and then panby to the bottom of the map - this makes marker jerk at the bottom of the map when its location changed - so i figured if i keep marker static by placing it into a div above map and fixate it via css style - so it stays in the same place all the time - but this is wrong as it cannot be moved with map then when someone drags map with a finger - so this cannot be right solution - what is your solution to this dilema unless i am missing something -

To achieve what you want, you need to rotate the map on the correct axis, find the position of the center of the map, and finally center the map at the right place.
1 - Rotate the map
In your case (I presume you want the car always face of the road in front of the user position) you need to rotate the map before centering, otherwise the map is always oriented to the north and it can be anoying when the car move in other orientation (south for exemple). In this case the point of view is oriented in the wrong direction and the user don't see the upcoming road.
You can find an exemple here in the documentation. Basicaly you need to use setHeading() method. The rotation on gmap is not easy than it can be (see this post).
2 - Find the center of the map
To find the updated position of the center of your map, you need to retrieve the latLng location of a point always at the same distance (in pixel of the map container) above your marker fixed location. Use the methods fromLatLngToPoint() and fromPointToLatLng() to retrieve the position from the map to the real world or vice versa (see getProjection() for more details).
Exemple :
Your map is displayed in 1000*1000 px and the bottom position of the marker you choose is at 500px of the left side and 950px of the top side. If you want to move the center of the map without changing the position of the marker, you need to find the latLng position of the point at 450px above your marker.
function findMapCenter(map, markerLatLng) {
// need this to adjust from the actual zoom on the map
let scale = Math.pow(2, map.getZoom());
// position in pixel x.y from the container
let markerWorldCoordinate = map.getProjection().fromLatLngToPoint(markerLatLng);
// calcul of the position of the center
let centerWorldCoordinate = new google.maps.Point(
markerWorldCoordinate.x,
markerWorldCoordinate.y + (450/scale) // 450 because in my exemple is from 450px at the top of the marker
);
// return latLng of the center point of the map
return map.getProjection().fromPointToLatLng(centerWorldCoordinate);
}
3 - Set the map at the right place
Use setCenter() method to center the map on a choosen latLng location.
let marker; // = config of your marker
let gMap = new google.maps.Map(document.getElementById('map'));
update({lat:MARKER_LATITUDE, lng:MARKER_LONGITUDE});
// call this every time you want to update
function update(markerNewLatLng){
// ... first step : rotate the map if you need to
// then update marker position
marker.setPosition(markerNewLatLng);
// center the map
gMap.setCenter(findMapCenter(gmap, markerNewLatLng));
}

Leaflet JS - center and zoom on feature group

Code:
var map = L.map('map');
L.tileLayer('//{s}.tile.cloudmade.com/41339be4c5064686b781a5a00678de62/998/256/{z}/{x}/{y}.png',{minZoom:8, maxZoom:15}).addTo(map);
marker1 = L.marker([37.4185539, -122.0829068]).addTo(map);
marker1.bindPopup("Google Campus");
marker2 = L.marker([37.792359, -122.404686]).addTo(map);
marker2.bindPopup("Financial District");
var group = new L.featureGroup([marker1, marker2]);
map.fitBounds(group.getBounds());
The above code will center the map on the center of the markers, but does not set a zoom level so that the markers and only the markers are visible.
If I leave out the 'minZoom' attribute of the map object when adding the initial layer, the entire globe is visible. My desire is to have the map set a zoom and boundaries so that the markers are visible, and zoomed in. Any clues on how to accomplish this?
I thought that the fitBounds method would set a Zoom level, but for some reason in my situation it does not do so.

Your code is setting the map to a zoom level where both of the markers are visible at the highest possible zoom level. Because of the distance between the two markers and the way web mapping works, this is best fit using raster map tiles. Higher zoom levels will be zoomed in so much that you won't be able to see both markers.

Circle creates on previous coordinate on google map api

I'm creating marker and circle around 500 area. When user will be out of the boundary by drag the map another circle will create within same area of new generated marker. Issue is that its creating circle around previous generated marker instead of current generated marker.
You can check here:
http://jsbin.com/exiram/1
Can anyone help me please?

Pay atention with the events in tme map. for every pan "drag the map" you make a new marker in center of the map and a new circle for that marker.
probaly, you have a listener that capture all mouse events and call the code to make markers and circles.
you can make 2 buttons in your page, one to make a marker and other to make a circle.

Im a little bit busy to post a full answer so please excuse my psudo code
Somthing like this will work !
var map; // OUR MAP OBJECT
var circle; //OUR CIRCLE
var center; // lat long holder
google.maps.event.addListener(map, 'drag', function() {
center = getCenter();
circle.setCenter(center);
});

Javascript API Google Maps set Center right of the screen

I have a container to render a google map instance, above this container i draw (HTML) another container with a search box (Origin and Destination).
When an origin is selected, a marker is draw in the map (the same with the Destination input).
Now i need to "pan" the map to show the markers in the right side of the search box.
Now, when i put a marker i use fitbounds to make sure the marker is inside the map container, but in some occasions, the marker is draw under the searchbox.
Then i try to use "panBy" method to draw the center of the map in the right side of searchbox, but don't always work.
How can i make sure that the two markers always be visible and draw in the right side of search box?

Consider this: You need to make sure that the marker is in the right side of the map. If we get the NE coordinates along with the center, we can compare that with the marker position and easily set a new center as required.
Code:
google.maps.event.addListener(marker, 'click', function() {
var markerPos = this.getPosition(), center = map.getCenter(),
mapNE = map.getBounds().getNorthEast();
if(!(markerPos.lng() > center.lng() && markerPos.lng() < mapNE.lng())) { //marker is not on the right side
//based on center and NE calulate pos to center the marker
map.setCenter(new google.maps.LatLng(markerPos.lat(), (markerPos.lng() - (mapNE.lng() - center.lng())/2)));
}
});

Overlay with DrawingManager google map v3

I am using google map v3 and its drawingManager feature, I want to get the pixels of these Shapes either through Lat and Long or directly.
Here is the URL of drawingManager Shapes
https://developers.google.com/maps/documentation/javascript/examples/user-editable-shapes
I want to get the pixels as here with respect to the container of map
http://gmaps-samples-v3.googlecode.com/svn/trunk/latlng-to-coord-control/latlng-to-coord-control.html
like here, buts using overlay class and I want to use it for DrawingManager Shapes, need some help on it.
Thanks

To translate a LatLng to a Point use the method fromLatLngToPoint() of the current projection.
The current projection is returned by mapObject.getProjection()
However, a shape isn't always defined by LatLng's/Points.
For rectangles you must translate the points defined by the bounds, for a circle the center(and/or bounds), and for polylines/polygons the path.