2 Complete description for an undefined grid system used for the data set. Include the name of the grid system,the names of the parameters and values used for the data set,and the citation of the specification for the algorithms that describe the mathematical relationship between the Earth and the coordinates of the grid system. Reference method used Use when the second indicator is 7 for the geospatial reference method used in the data set. Every flat map misrepresents the surface of the Earth in some way. On an equidistant map, distances are true only along particular lines, such as those radiating from a single point selected as the center of the projection.
Shapes are more or less distorted on every equal-area map.
On conformal maps, sizes of areas are distorted even though shapes of small areas are shown correctly. The degree and kinds of distortion vary with the projection. Printing Field 342 does not print.