CARTOMETRIC ANALYSIS AND GEOREFERENCING OF SPECIAL (1:75 000) AND GENERAL (1:200 000) SCALE SHEETS OF THE THIRD MILITARY SURVEY

摘要

The 1:75,000 scale Special Map (SM75) and 1:200 000 (GM200) series of the Third Military survey is analysed in this text. Geographic coordinates of the sheet corners are computed from the sheet number codes, as well as their grid coordinates in the modern Krovak Projection and Czech and Slovak national grid called S-JTSK. Distortions caused by paper drying and shrinkage were analysed and a mathematical algorithm is given to compute their effects. This analysis also verified the usefulness and practical adaptability of the shrinkage correction method to obtain more precisely rectified map sheets for GIS applications. The Third Military Survey of the Czech Countries The historical Third Military Survey, concerning the territory of the Czech Crown, was carried out in the Austria-Hungarian Empire in the period of 1870-1883. The survey was carried out in decimal scale of 1:25,000 and resulted in topographic sections. Numeric base for the survey was a network of trigonometric stations in the coordinate systems of Gusterberg and St. Stephen transformed into the polyedric projection. The maps of the 3rd Military Survey survived the end of the Austro-Hungarian Empire in 1918 thanks to their importance and became the state map series in Austria, Hungary and Czechoslovakia.