Generation of Statewide DEMs and Orthoimages – Guidelines and Methodology

Cartosat-1 je globalna stereoskopska misija visoke razlučivosti kojoj je cilj podrška naprednim primjenama u nekoliko područja kartiranja, upravljanja prirodnim sirovinama, upravljanjem katastrofama, planiranja infrastrukture i razvoja. Suradnički projekt stvaranja digitalnih modela visina (Digital Elevation Model – DEM) i mozaika ortoslika za sve države i teritorije u Indiji završeno je u okviru projekta pod imenom "Informacijska podrška temeljena na prostoru za decentralizirano planiranje" (Space based Information Support for Decentralized Planning – SIS-DP) upotrebom fotogrametrijskih tehnika sa stereo podacima satelita Cartosat-1. Upotrijebljeno je približno 11000 stereo parova podataka Cartosat-1. Fotogrametrijski blokovi za svaku državu obrađeni su upotrebom postojećih referentnih slikovnih podataka i stvorene su ortoslike. U radu se opisuje metodologija stvaranja DEM-ova i ortoslika za cijelu Indiju. Raspravlja se o smjernicama za kvalitetu izlaznih podataka. Opisuje se način distribucije putem javno dostupne platforme na internetu.Cartosat-1 is a global, high resolution stereographic imaging mission to support enhanced applications in several areas of terrain mapping, natural resources management, disaster management, infrastructure and development planning. A collaborative project of generating statewide Digital Elevation Model (DEMs) and mosaic of Ortho-image for all the states and union territories in India has completed under the project namely Space based Information Support for Decentralized Planning (SIS-DP) using Photogrammetric techniques with Cartosat-1 stereo data. Approximately 11000 stereo pairs of Cartosat-1 data were used in this process. Photogrammetric blocks for each state were processed using existing reference tiles and accordingly ortho-images were generated. The paper outlines the methodology for generating state-wide Digital Elevation Models (DEMs) and ortho-images. The guidelines that govern the quality of the output were discussed. Dissemination mechanism via public accessible web platform was described