Naslov
Topographic Data for Digital Soil Mapping Applications

Autori
Baučić, Martina

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, stručni

Knjiga
Status and prospect of soil information in south- eastern Europe: soil databases, projects and applications

Urednik/ci
Hengl, Tomislav ; Panagos, Panos ; Jones, Arwyn ; Tóth, Gergely

Izdavač
Europska komisija

Grad
Luxembourg

Godina
2007

Raspon stranica
139-148

ISBN
978-92-79-04972-9

Ključne riječi
topographic data, digital mapping, data acquisition

Sažetak
Digital soil mapping applications use topographic data as quantifiable element for analysis. Thus, it is important to consider mapping as controlled process resulting with topographic data of known accuracy and generalization. Errors of measurements and their propagation, geodetic reference systems, map projections and topographic modeling are fundamentals of mapping. Topographic data acquisition methods have evolved from tedious and expensive land surveying to digital photogrammetry with fully automated DTM and orthophoto production, while GPS enables mapping to everyone, everywhere in any time, with simple and cheap equipment. More powerful and affordable hardware and software enable topographic data processing so, various derived products became available (slope and aspect maps for the analyses, hill shading for visualizations, etc).The most interesting digital product for digital soil mapping is DTM. Again, DTM must meet expected accuracy and it is necessary that input data is of known accuracy (often contour lines from analog maps). In context of all the institutional, technological and business changes, topographic data products in Croatia are evolving too. The new reference systems and map projections have been recently introduced, availability, prices and order forms for the official data can be gathered by web, and on-going projects are aiming towards web dissemination of topographic data.

Izvorni jezik
Engleski

Znanstvena područja
Geodezija

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