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How would you determine if a given point is within the bounding box?
My point is 48.847172 , 2.386597.
Boundingbox:
"48.7998602295", "48.8198640442", "2.46138595581", "2.48138619423" 
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Same way you compute the area of any other rectangle, by multiplying the width by the height.
To find the bounds of the box containing a triangle, you simply need to find the smallest and largest x and y coordinates from the three coordinates making up the triangle.
the limits of coverage of a data set expressed by latitude and longitude values in the order western-most, eastern-most, northern-most, and southern-most.
Do just as usual:
if( bb.ix <= p.x && p.x <= bb.ax && bb.iy <= p.y && p.y <= bb.ay ) { // Point is in bounding box } bb is the bounding box, (ix,iy) are its top-left coordinates, and (ax,ay) its bottom-right coordinates. p is the point and (x,y) its coordinates.
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