Possibilities of quantitative and qualitative inventory of drainage devices based on selected maps and photogrammetric images

The aim of the work was to analyse which of the selected geodetic and cartographic materials (maps and high resolution aerial images) are useful for inventory of water drainage devices. Obviously, correct determination of their quantitative and qualitative statuses can be made through field inventory. Quantitative inventory can also be done on the basis of maps. For the purpose of this research, an analysis was carried out which consisted of checking which of the selected cartographic and photogrammetric materials best reflect the location of irrigation devices in the field. The analyses were based on both digital and analogue maps at the scale of 1 : 50 000 to 1 : 5 000. The selected photogrammetric materials included images at the scale of 1 : 10 000 and 1 : 1000.