DEVELOPMENT OF AERIAL PHOTOGRAMMETRIC PHOTOGRAPHY AND
PRODUCTION OF DIGITAL ORTHOPHOTO MAPS IN THE REPUBLIC OF CROATIA
[van Landek, Ljerka Rasié, Nada Malnar
State Geodetic Administration, Gruska 20, HR-10 000 Zagreb, Croatia
ivan.landek@dgu.hr, ljerka.rasic@dgu.hr, nada.malnar@dgu.hr
KEY WORDS: aerial, photography, orthophoto, map, photographs, survey
ABSTRACT:
Development of taking of aerial photogrammetric photos for the whole territory of the Republic of Croatia and an overview of
photomaterials that have been used for topographic survey and stored in the State Geodetic Administration archive are discussed in
this paper. Since digital orthophoto maps at the scale 1:5000 have been produced recently, the manner of their production following
the Book of Ordinances of Topographic Survey and State Map Production Manner with overview of accomplished works as well as
digital orthophoto maps production plan until the year 2005 are explained. Available form and quality of the mentioned products are
given here too.
1. INTRODUCTION
The first aerial photogrammetric photographs in Croatia date
from the years 1929 and 1930 (Donassy, 1984), when the first
aerial photogrammetric recording ordered by the «Government
of the free and royal capital Zagreb» for the needs of general
regulation map producing was carried out. Recording was
accomplished with an unknown camera, and records were made
in format 13x18 cm. Two photomaps at the approximate scale
1:10000 worked out from those records and some reproduction-
slanting records from the mentioned recording with written
documentation are kept in Museum of Zagreb city.
From those early beginnings of aerial recordings until now
recordings in different scales and for different purposes have
been carried out with continuity. Aerial recordings have always
been used for multipurpose aims, but records have been used as
main source for production of maps at different scales,
photosketches, photomosaics and orthophoto maps.
Development of photogrammetry as a branch of geodesy has
been intensive since the 40's of the past century (in 1947 Sub-
Department for Photogrammetry on the Geodetic Department of
Technical Faculty in Zagreb was founded). Thanks to its experts
(Professor Franjo Braum, Professor Vjekoslav Donassy,
Professor Teodor Fiedler, Plesko Jonatan etc.) Republic of
Croatia has always followed and accepted all new technological
achievements in domain of photogrammetry.
Development of aerial photogrammetric recordings can be
divided into three phases: the first phase in the Yugoslavian
Kingdom, where Croatia did not have possibility of its own
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development because of power centralisation in Belgrade, then
the period after the Second World War till 1990 and the third
period after becoming independent (1990) until today.
Development of aerial photogrammetric recordings from
above mentioned three periods and production of digital
orthophoto maps in the Republic of Croatia following the
Book of Ordinances of Topographic Survey and State Map
Production Manner will be presented it this paper.
2. AERIAL PHOTOGRAMMETRIC PHOTOGRAPHY
IN THE REPUBLIC OF CROATIA
UNTIL THE YEAR 1990
In the period from 1956 to 1990 aerial photography were
carried out mainly for necessity of at that time called Basic
State Map at the scale 1:5000 production, nowadays called
Croatian Basic Map at the scale 1:5000. There were different
photo scales (from 1:4000 to 1:17400). Photoflights were
accomplished by two institutions, Military Geographic
Institute in Belgrade and Geodetic Institute in Ljubljana. The
most part of aerial photomaterial is kept in the archive of the
State Geodetic Administration. Photogrammetric photography
for the period between 1956 and 1990 are shown in figure 1.
The smaller part of photomaterial was recorded on glass-plates
and the rest of it on the films. Since it is a case of priceless
historical worth for the Republic of Croatia, State Geodetic
Administration is converting all tentatively old photomaterials
into raster format with precise photogrammetric scanner
PhotoScan TD from Intergraph (Landek and Kaurié, 1997).
