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Transformation Scale

Question asked by CADEngr2014 on Aug 5, 2020
Latest reply on Aug 11, 2020 by pal.herman.sund@geodata.no_Geodata



I have been learning Transformation concepts working with matrix algebra to develop a basic 2d conformal transformation calculator in excel.  The scale is developed as a relationship between line segment lengths between one coordinate system and another.  But my question is concerning the concept of scale as it relates to a survey perspective that scale in a transformation is used to change between grid and ground.  It is my understanding that the two scales are different; one derived from a line segment length ration, and the other based on the earth radius, resulting in two different scales and two different processes that use these scales.  I wonder if someone can confirm my understanding above, or if a reference could be recommended that may explain the differences between the two scales.