Spezialkarte der Oesterreichischen-ungarnischen Monarchie
The »Spezialkarte der Oesterreichischen-ungarnischen Monarchie« is a topographic map at the scale of 1: 75,000. Topographical maps are the basis of national cartographic information systems, necessary for making other thematic maps and cartographic representations, a tool for defence planning, orientation, etc. The Spezialkarte der Oesterreichischen-ungarnischen Monarchie at the scale of 1: 75,000 is one of the most exact maps of its time. Due to development of geodetic techniques and outdated maps available, a new measurement of the Habsburg Monarchy began towards the end of the 19th century - today called "the third military survey". It was carried out between 1869 and 1887. In 1880, the first sheets were made. Ordnance survey maps were used for orientation purposes. They cover the area of 7'30'' latitude and 15' longitude. As they were of high quality, several updated reprints of the maps were published until 1940. The Slovenian territory was covered on 27 sheets.