two point that have same ele
vation
Any two points have to be on some line.
If two points are coplanar, they lie on the same plane.
It depends on how far away the observer is from the two points.
No. points are collinear only when they are on the same line
Points cannot be parallel to other points. A straight line joining two points is parallel to a straight line joining another pair of points if the gradient (slope) of the two lines is the same.
elevation
The best way to find out if 2 points have equal elevation is to measure them. You must measure each of these points.
Elevation contour lines.
if two points have the same points then they make a vertex.
The lines connect points that are at the same elevation.
contour line
isolines
No. Contour lines connect points of the same elevation
Contour lines represent connecting points of equal elevation on a topographic map.
The distance between two points must be known to determine the average slope between the two points. You must also know the change in elevation.
The elevation of a point that falls between two contour lines can be approximately determined by averaging the elevation of those two points. Assuming the point is somewhat halfway between the lines, this can be done by adding the elevations and dividing by two.
Points on the same line are collinear (co-linear) points.