I'm trying to use leaflet to create a GTA V map, however I would like for the map to not show the outside of the map boundaries, and instead be cut off, I don't know if this is possible, I'll try to show what I mean below.
I don't want the user to be able to move the map further out than where the image of the GTA V map ends, so no "grey area", is this possible?
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I am developing an interactive map in HTML+JavaScript using mapboxgl (0.33.1). When the user clicks a button (which is associated with a particular location in the map), I call easeTo(), which put that location in the center of the map.
window.map.easeTo({
center: item.loc
});
Because my application has some overlapping UI over the bottom half of the map, I actually want to put that location not in the center of the map, but in the center of the top half of the map (25% from the top).
I'd appreciate if somebody could give me a hint how achieve it. My app knows the exact sizes of the window in Pixel (and also the zoom level), but (I assume) I need to convert it into the map-coordinate (from pixel) to add an appropriate offset to the "center" parameter I pass to easyTo() function.
I think I found the answer. I just need to call the project() method -- which was very hard to discover!
I have a historical city map that I want to display using Leaflet.
I like to set the coordinates of this image to reflect the real world, e.g so I can click on the image and get the real coordinates.
I guess I can just make it an overlay to a real map, but there must be a better solution just define at what coordinates of the corners of the image.
For this image, the approx real world coordinates is NW: 60.34343, 18.43360, SE: 60.33761, 18.44819
My code, so far, is here:
http://stage1876.xn--regrund-80a.se/example3.html
Any ideas how to proceed? It feels like it there should be an easy way to do this?
Any help would be so appreciated!
EDIT: The implementation (so far) with tiles are optional. I could go for a one image-map as well.
Is there any way to adjust the bounds of the map so that the right-edge of Russia doesn't appear over to the left? You can see in the image I have a MultiPolygon area overlaying Russia but the map and the overlay are split. I'd like that tiny piece of the country to be on the right if possible!
Edge of Russia on the wrong side of the map:
A workaround I can think of is using the maxBounds property, where you would shift the default bounds slightly to the right, along with minZoom: 1. This won't prevent the user from seeing the world several times for a short time if zoomed out far / panning outside, as it says there:
... bouncing the user back when he tries to pan outside the view
var map = L.map('map',{
maxBounds:[ [-90, -160], [90, 200] ],
minZoom: 1
}).setView([66.058, 189.459], 4);
Demo
Welcome to SO!
If your multi polygon is the blueish area, then I am afraid you have to refactor your data in order to achieve what you want (shifting the left area onto the right, as if it were stitched back to Russia main land).
Your data (probably GeoJSON?) contains a separate polygon which longitudes are in the [-180, -120] range. Leaflet has no choice but to display it on the left of your map, independently from the noWrap option.
So you would need to dig into your data, and add 360 degrees longitude to every node of this polygon, so that they now sit in the range [180, 300].
Or somehow introduce a "detection" in your code that would perform the longitude addition automatically for shapes which bounds and/or center are far away (let's say in the [-180, -120] longitude range). Leaflet does not perform that operation automatically out-of-the-box.
Note: the noWrap option is for your Tile Layer not to load tiles outside that "central" world (in order to avoid showing multiple copies of the world). But in your case, you want to show a part of Russia / Siberia on an "adjacent copy of the world", so you might want to remove that option, or you will have your polygon not sitting over any basemap.
Is there a Leaflet plugin or example for letting the user control the display order of overlay layers in a map?
Turning layers on and off is working fine, but I'd like the user to be able to drag layer names within the layer control to set the Z order.
For Path class (Polygons, Polylines, etc.) there are methods 'bringToFront()' and 'bringToBack()'. You can't exactly set precise position in draw order, but iterating over layer list and calling 'bringToFront()' could be less time consuming, then re-drawing every layer (especialy if they are bigger).
I have a lot of annotations to manage inside the mapkit view.
The rules are :
1 -only show annotations when the mapView.region.span.longitudeDelta is above 0.042
2 -only show annotations inside the visible area.
3- remove the annotations when they comes out the visible area...
How I can do that ... Share your experience...
Thanks
You need a few things. One is to search your database for the pins with latitudes and longitudes inside the map's view. This is called a bounding box. The next is to remove the annotations when they move outside the visible rect of the map. Each time the map is moved, you'll have to recalculate what pins are in the box and what pins are outside but still on the map.
One hint I can give you is to divide the visible rect of the map into squares (maybe 17 x 23 squares of 20 x 20) and figure out if a pin goes into that square. If it does, mark that square as filled, and if another pin wants to go into that square, don't let it. This will allow you to filter the pins so there aren't too many on screen at one time.
It's not an easy problem, but if you do some search around you'll find your way through it. This cluster marker code for Google Maps might help.