Sharing and cooperation in geo-information technology

Aziz, T. Lukman

Bibliographic data

Monograph

Persistent identifier:: 856479470

Author:: Aziz, T. Lukman

Title:: Sharing and cooperation in geo-information technology

Sub title:: ISPRS Commission VI Symposium, April 15 - 17, 1999, Bandung, Indonesia

Scope:: 1 Online-Ressource (130 Seiten)

Year of publication:: 1999

Place of publication:: London

Publisher of the original:: RICS Books

Identifier (digital):: 856479470

Illustration:: Illustrationen, Diagramme

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: [WG VI/2: Computer Assisted Teaching]

Write comment:: Der Aufsatz "An Experience IN Implementing Information Technology For Distance Learning In Higher Education" ist im Original nicht enthalten.

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: CAT / CAL IN PHOTOGRAMMETRY ON THE INTERNET. Joachim Hôhle

Document type:: Monograph

Structure type:: Chapter

out on different computers (PCs, workstations), operating systems (Windows 95/98/NT, Unix, Linux) and browsers Explorer from Microsoft and HotJava from Sun). Especially the browser is a new module which needs some attention. In general, the Java compatibility is ensured by a special plug-in or the selection of the language “Java” in the settings. It must be ensured that the JVM is the same when developing and running the program. In the development the standard font was used which does not have to be overwritten by the font selector in the browser. Table 1 shows the result of tests. It is obvious, (Netscape Navigator and Communicator, Internet that today exists platform independence for three major browsers from the mentioned version on. Older versions of the named browsers will possibly create problems. The browsers and the JDK change continuously but not synchroneously. The version of the usable browser is therefore important in order to ensure a good performance of “LDIPInter”. Some minor differences in the display occurred however with the Unix and Linux operating systems, namely with the use of Greek letters. THEME 1: AUTOMATIC MEASUREMENT OF RESEAU CROSSES AND FIDUCIAL MARKS Value Grey Search Matrix Target Matrix X n L, 1 r = 0.00 - The position of the target (Reseau cross or fiducial mark) shall be found in the search matrix - The densities of the target have noise and smear in the image - The target matrix is moved pixel by pixel over the search matrix - At each position a correlation coefficient (r) is calculated -The position with the greatest value ofris the required position N Information 1: I L co variare if standard dev.^ ■ standard dev.^ 81- . arithmetic mean 1 in the target area L £(&-&)(&-&) . arithmetic mean c in the search area Figure 2: Screen image for a theme in “LDIPInter” 4. USE OF “LDIPInter” In order to run “LDIPInter” one has to call the applet within the browser with its URL address from above. This can be done on different client machines and browsers (see also Tablel). “LDIPInter” is downloaded from the Web within a few seconds. The loading time depends on the performance of the computer and of the network. Also the “traffic” on the Web plays a role. But under good conditions it takes a few seconds only. The loading time is considerably reduced by downloading the bytecode file onto the disk of the client machine and starting from there. This means, however, that the advantage of automatic updating for new versions gets lost. The application of the program can have three different scenarios or cases: 1. Exercise with a number of students in a room equipped with a number of personal computers 2. Demonstration of the themes and part of the exercises by the teacher in a classroom during a lecture

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