Technologic peculiarities of large-scale 1:1000(or 1:2000) orthophotomaps creation in urbanized territories are described. Orthophotogrammetric processing is described and analysed, parameters of accuracy presented. Practical recommendation are given. Influence of cartographic projection is studied. Aerial photo is recommended as colour analogue or digital. For orthophotomapping of scale 1:1000 is recommended 1:5000 scale aerial photo and for 1:2000 scale is recommended 1:8000 scale aerial photo. The suggested size or aerial colour photonegative (diapositive) smallest scanning element (pixel) is 15 μm. Aerial triangulation networks could be established by digital automatic method. Suitability or terrain model is computed from formulas (6) and (7). For joining raster aero images into mosaic it is important to take into consideration perspectives of large buildings, separating fragments by middle lap line. The smallest element of orthophoto map is pixel 10 μm. Clear lines of map RMS error in relation to geodetic reference is designed up to 0,40 mm(marginal errors are double).
Article in Lithuanian.
Urbanizuotų teritorijų kartografavimo ypač stambiu masteliu ortofotogrametrinės technologijos ypatumai
Santrauka. Aprašomos urbanizuotų teritorijų ypač stambaus mastelio (1:1000–1:2000) spalvotų ortofotografinių žemėlapių sukūrimo, taikant naujausias technologijas, galimybės. Pateikiami technologijos ypatumai ir tikslumo duomenys, rekomenduojami aerofotonuotraukos sudarymo parametrai. Aptariami aerofotonuotraukų skenavimo darbai, pateikiamas tinkamiausias vaizdo elemento (pikselio) dydis, skenavimo geometrinis tikslumas, nurodomi aerotrianguliacijos variantai, skaitmeninio reljefo modelio sudarymo žingsnio dydis bei tikslumas, analizuojami ortofotografinio žemėlapio generavimo ypatumai.
Authors who publish with this journal agree to the following terms
that this article contains no violation of any existing copyright or other third party right or any material of a libelous, confidential, or otherwise unlawful nature, and that I will indemnify and keep indemnified the Editor and THE PUBLISHER against all claims and expenses (including legal costs and expenses) arising from any breach of this warranty and the other warranties on my behalf in this agreement;
that I have obtained permission for and acknowledged the source of any illustrations, diagrams or other material included in the article of which I am not the copyright owner.
on behalf of any co-authors, I agree to this work being published in Geodesy and Cartography as Open Access, and licenced under a Creative Commons Licence, 4.0 https://creativecommons.org/licenses/by/4.0/legalcode. This licence allows for the fullest distribution and re-use of the work for the benefit of scholarly information.
For authors that are not copyright owners in the work (for example government employees), please contact VILNIUS TECH to make alternative agreements.
