Dark grey horses will have a light black coat, mane and tail. Brown is a very common horse colour and sometimes it can be hard to tell if horses are brown or black. There coat, mane and tail will all be brown from a light tan colour to a dark chocolate colour. A bay horses coat colour will be brown whilst their mane and tail colour will be black.
centroid(noun) the center of mass of an object of uniform density. centroid(Noun) The point at the centre of any shape, sometimes called centre of area or centre of volume. For a triangle, the centroid is the point at which the medians intersect. The co-ordinates of the centroid are the average (arithmetic mean) of the co-ordinates of all the points of the shape.
In geodesy, geographic coordinate conversion is defined as translation among different coordinate formats or map projections all referenced to the same geodetic datum. A geographic coordinate transformation is a translation among different geodetic datums.