抄録
This paper is the first part of a series of papers that proposes a method to estimate precision of spatial information. This deals with an error model of points on spatial information. The model is based on two-dimensional normal distribution. A probability density function of distances between two points is formulated. Then expectation and variance of it is calculated. Finally, case studies are done and precision of the first class triangulation net of Japan is estimated as about 1.41 meter in standard deviation.
