grid lines that are drawn in a north-south direction are transverse mercator projection.
grid lines that are drawn in a north-south direction are transverse mercator projection.
grid lines that are drawn in a north-south direction?
transverse mercator projection
grid reference









































grid references define locations in maps using cartesian coordinates. grid lines on maps define the coordinate system, and are numbered to provide a unique reference to each location on the map. this reference is normally based on projected eastings and northings.









































section::::types.









































grid systems vary, but the most common is a square grid with grid lines intersecting each other at right angles and numbered sequentially from the origin at the bottom left of the map. the grid numbers on the east-west (horizontal) axis are called eastings, and the grid numbers on the north-south (vertical) axis are called northings.
grid reference
one drawback of a fixed radiographic grid is that it creates grid lines on the image (see the chest x-ray shown in the article). hollis potter (1880-1964) showed in 1920 that these grid lines could be eliminated by moving the grid at right angles to the grid lines during the exposure. if the range and speed of motion is sufficient, the grid lines will be blurred out. the motion may be oscillating, vibrating, or reciprocating and must be continuous and smooth. the motion must also begin before exposure and continue until after exposure.
bucky-potter grid