Summary of survey

This is a data set of elevation in which the grid was derived from Standard Grid Squares (Third Area Partitions with a side of about 1km) by subdividing each square into a 10 × 10 grid with a mesh size of 100 m × 100 m. This data was based on Fundamental Geospatial Data (DEM) 10 m Mesh (Elevation) by Geospatial Information Authority of Japan. Average elevation in a 100 m × 100 m grid was defined as an attribution of the grid.
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