I am having a hard time trying to figure out how to wrap a Lat/Lng point with a rectangle that is 20meters by 20meters.
Use-case:
> Click on a marker on the Google map
< Infowindow opens
> Click a button called 'Wrap' on the Infowindow
< Automatically create a 20x20m box with the marker dead center
I have no issue creating the rectangle (square rather) on the map I just need to know how to compute the border of the square in Lat/Lng.
On a normal grid I would get the NW and SE points by:
marker_nw_y = marker_y + 10 (meters)
marker_nw_x = marker_x - 10
marker_se_y = marker_y - 10
marker_se_x = marker_x + 10
From there I could create the graphic square etc.. But with Lat/Lng it gets more complicated because changing the degree between two points is different depending on where you are.
How could I do this? Manipulating the Haversine formula? Instead of solving for ‘distance’ I would need to rearrange and solve for one of the coordinates, but rearranging that formula is difficult and im not sure whether my results are even right.
I believe this question includes code that should let you accomplish what you’re looking for.