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DIGITAL MAPPING USING AERIAL DIGITAL CAMERA IMAGERY
Joon-Mook Kang 3 , Joon-Kyu Park 3 , Min-Gyu Kim 3
department of Civil Engineering, College of Engineering, Chungnam National University
220, Gung-dong, Yuseong-gu, Daejeon, ROK - (jmkang, surveyp, surveyk)@cnu.ac.kr
Commission IV, WG IV/9
KEY WORDS: Aerial Digital Camera, Photogrammetry, Accuracy Analysis, Mapping, Digital Map
ABSTRACT:
Lately, photogrammetry using aerial digital camera has been utilized widely in the fields of a plan, development and management
for a national land in advanced countries. There are various benefits using photogrammetry with digital camera imagery, such as the
prevention of differential stretch errors when scanning analogue films as well as the cost-cutting according to banning the use of
analogue films. Most of all, one of the biggest benefits is to be able to store, maintain and manage digital imagery in the computers
without any procedures.In this research, the characteristics which were analyzed on the basis of analysis of properties and
application cases in digital camera imagery were investigated and a large-scaled map with aerial digital camera imagery was made.
In order to analyze accuracies of results for the production of digital map using digital camera imagery, the digital topographic maps
of 1:1000 scale which was produced by Korea National Geographic Information Institute (KNGI) were used. And then the accuracy
between digital map of KNGI and generated map from digital camera imagery was compared and assessed. From the results of this
study, it would carry out the accuracy analysis for digital map by digital imagery in a wide area and it would be able to increase the
uses of the production and application of digital map using digital camera imagery.
1. INTRODUCTION
Surveying and mapping are very important techniques for
development and management of a national land. In order to
collect geospatial information, various survey techniques are
required. These techniques from measurements of the moon and
stars, via a term of using invar tape or a simple instrument to
GPS surveying or remote sensing have been developing rapidly.
Aerial photogrammetry started in the mid and late 19th century
in France. Developing the metric camera in the opening years
of the 20th century brought the epoch-making turning point to
mapping wide area, which became the most efficient and
economical surveying technique to produce topographic map in
most countries.
The aerial photogrammetry is used in many spheres. And the
development of techniques(such as aircraft, computer, etc.)
changes it from mechanical method and analytical method to
digital method.
Nowadays, although techniques and products to relate the aerial
photogrammetry in Korea is used in many parts of a digital
environment, aerial photogrammetry using existing analogue
camera is still conducted, besides the scanning procedure to
change from analogue imagery to digital imagery has to go
forward. This procedure of scanning the film wastes expenses
and time. Furthermore it brings some errors sometimes.
However, if aerial photogrammetry using digital camera is
conducted, it needs no more film. So economical efficiency of
development, operation expense, space, and time can be
improved, in addition the procedure of scanning to acquire
digital imagery is enabled to abbreviate and prevent errors of
scanning procedure. Also, imagery of digital camera is digital
data, it makes easy to save and manage the data.
Consequently, this research would be present foundation data
and reinvigorate relative industry as constructing of geospatial
information data about research area and analyzing accuracy of
digital camera imagery.
2. DIGITAL MAPPING USING AERIAL DIGITAL
CAMERA IMAGERY
The process of large-scaled digital mapping using digital
camera is more effective and economical method than the other
method using analogue aerial photography, because of omission
and simplification of scanning, ground control point surveying,
aerial triangulation.
In this research, digital mapping has been performed about
research area using aerial digital camera imagery. Economical
effectiveness and efficiency of digital mapping was proved by
executing the accuracy analysis. Figure 1 shows the mapping
process comparison of analogue versus digital.