How to draw a Polygon on Leaflet map using German Postcodes for example i have a postcode: 50933, i want to draw polygons on that Postcode area.
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I'm trying to programatically "draw" a circle with multiple Marker with React leaflet.
I'm doing it with cosinus and sinus trying to calculate theirs coordinate from the center point ...
But the more I'm near the pole the more the circle is an ellipssis ... Is it a way to transform the calculus to take this into account ?
In this example I'm in Oulu (near the pole) If you just change the x var into '0' you'll notice that the markers are now in circle !
please see this CodePen
Because a Leaflet map is a projection of a sphere onto a flat map, distortions will happen near the poles. You want to project your spherical Lat/Lng into flat Points, calculate the marker placements in flat Points and then unproject the points back to spherical LatLng.
I'm using Mapbox Terrain vector tileset to show elevation contours on my map. But my region of interest is quite flat, so there aren't any visible contours in that area. (basically, I see contours all around my region, but not in the actual region I need the contours for.)
How do I modify the ele field of the contour layer to change the contour density? Thank you!
Mapbox Terrain-v2, #contour, ele field
Based on the documentation, you have to use the exaggeration param, that will exaggerates the elevation of the terrain by multiplying the data from the DEM with this value
map.setTerrain({
'source': 'mapbox-dem',
'exaggeration': 1.5 // x1.5 multiplier to exaggerate DEM data
});
I have a problem for e-chart world map. Where I am trying to make the scatter and geo map in one world map.Geo map for plotting the areas and Scatter map for showing the colored region. i.e different country will have different color or same (depend on data). So is that possible..?
I have tried to set the option for geo and scatter but it shows two map.One of Geo and other of scatter.
I want to draw bearing angle using leaflet, as input I have a marker on map and the user can enter an angle value from a custom interface(this angle matches the bearing angle), so I want to draw this bearing angle on map. How can I do that on map using leaflet plugins? Any help is appreciated.
I Want to display current location using arrowhead in polyline.