TWO FUNCTIONAL SOFTWARE FOR INTERNAL USE; FLIGHT PLANNING AND 
PRESENTING OF DIGITAL ORTHOPHOTOS 
A.S. Demirel*, H.Akdeniz*, O.Aksu* 
? Harita Genel Komutanligi , 06100 Cebeci Ankara, Turkey - (sdemirel, hakdeniz, oaksu)@hgk.mil.tr 
Commission IV, WG IV/5 
KEY WORDS: Photogrammetry, Planning, Software, Orthoimage, Photography, 
ABSTRACT: 
As parallel to the developments, base materials used in photogrammetry and application software are taking in process to develop. 
Uses of high resolution spatial images, digital image processing, digital products are some of these results. But photographs 
acquired from aircrafts, are still keep their considerable place in photogrammetry, because of their low costs and effective usages in 
various disciplines. 
Image processing is the most important part of photogrammetry. But obtaining photographs and presenting digital products are also 
as important as processing images. For these purposes there are many commercial software. Here we developed software to serve 
these kinds of jobs. This software is developed according to request of our users, so they are much more useful for internal purposes 
then the other commercial ones. 
. 
First one is flight planning software. The purpose of the system is to reduce aerial survey operational costs by streamlining and 
speeding up the preparation and execution of the photo missions. This software has been formed with many useful tools for 
planning. These tools cover all the aspects of modern aerial survey photography: Digitizing, planning, taking photograph, reporting, 
archiving, besides the basic tools: zoom, print etc. 
The other software is presentation of digital orthophotos with user friendly interface. The purpose of the system is to reduce costs 
of printing and to present the products to users as soon as possible. This software has ability of presenting place names and vector 
data on a digital orthophoto. Tools on the software are; zooming, adding or editing place names or coordinates, measuring length or 
area, printing image with or without data in scale, exporting images into other formats, adding or editing vector data. 
1. FLIGHT PLANNING exposure stations must be planed carefully. This is also 
important for a safety flight, reducing aerial survey operational 
1.1 Introduction costs and speeding up the preparation and execution of the 
: - : : : photo missions and flight. 
Photographs acquired from aircrafts, are still keep their 
considerable place in photogrammetry, because of their low 1.2 Planning 
se . . . . . . : > 
costs and effective usages in various disciplines. Computers and 
GPS (Global Positioning System) technology, called airborne The first step of a planning is determining of the project 
GPS, are also taken part into photogrammetric project. By ^ requirements. Considering the requirements of the project, 
using additional equipment with GPS technology, it can be project area, photo scale, end lap, side lap, direction of strips, 
able to navigate flight and determine camera exposure station, coordinate system, camera type and film type are determined. 
which is the major problem in photogrammetric project. According to these data, base distance between two exposure 
stations along flight line and the distance between two adjacent 
The flight planning is the first step in photogrammetric project. flight strips are calculated. The flight height is calculated for 
In order to use new technologies and to get optimum profits, it each strip by checking the terrain height of related strip. After 
is required to prepare an efficient flight plan. Since GPS that, coordinates of exposure stations are obtained. 
technology has been used successfully in photogrammetry, 
planning of a flight for acquiring aerial photographs can not be Photo scale is selected depending on the project purposes, such 
considered as separately. Nowadays, most of the planes, as the desired accuracy of final product, purpose of use etc. The 
designed for aerial photography, have GPS and computer aided smallest possible photo scale is selected because of reducing the 
flight management system. To use these systems effectively, the number of models. But this scale can not be selected four times 
first and the basic principle is preparing the flight plans in bigger than final product scale to identify the details need for 
digital formats and entering these data to the system digitally. desired accuracy. 
The main goal of planning is finding out the best fit flight lines One of the wide or normal lens camera types is selected 
and camera exposure stations. In order to cover the project area according to characteristics of the project area. In generally, 
with minimum number of models, flight lines and camera wide lens cameras are preferred for the arca that is smooth and 
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