XXII ISPRS Congress 2012: Technical Commission VII

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Multivolume work

Persistent identifier:: 1663813779

Title:: XXII ISPRS Congress 2012

Sub title:: Melbourne, Australia, 25 August-1 September 2012

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663813779

Language:: English

Additional Notes:: Kongress-Thema: Imaging a sustainable future

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1663821976

Title:: Technical Commission VII

Scope:: 546 Seiten

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663821976

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(39,B7)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.; Literaturangaben

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

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [VII/6: REMOTE SENSING DATA FUSION]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: PLANNING TRIPOLI METRO NETWORK BY THE USE OF REMOTE SENSING IMAGERY O. Alhusain, Gy. Engedy , A. Milady, L. Paulini, G. Soos

Document type:: Multivolume work

Structure type:: Chapter

Y tudy, and | need to ing of the 1g partner with such refore the Ip-to-date 'sign and atisfy the itySphere Ss satellite CitySphere images are high-resolution images acquired by QuickBird satellite; they were introduced by DigitalGlobe to provide surveyors, city planners, and geographic information systems specialists with a comprehensive, current, and repeatable image data covering major cities. These images provide the foundation and geographic context for a wide range of applications that require an up-to-date imagery; they are ideally suited for applications requiring consistent, reliable, and current data coverage of study sites where there is a need to integrate imagery into the workflows and decision-making processes. CitySphere images used in this project are a collection of colour image mosaics acquired over Tripoli city in and around March 2006, these mosaics were arranged, co-registered, and projected resulting in an ortho photograph mosaics. The resolution of satellite imagery is 60 cm, projected according to the WGS-84 datum system where the 33" zone of the Universal Transverse Mercator projection (UTM) was used. The individual image mosaics were aligned together to cover the whole area of Tripoli city, and put into GeoTiff image format which is very much suitable for computer aided design and geographic information systems related applications. Software used in processing these images included AutoCAD, GIS, and image processing programs. To cover all areas where the Metro network is planned, the above mentioned image was complemented by a separate satellite image covering narrow path extending from the borders of the city to Tripoli International Airport and centered on the axis of the Airport highway which is aligned with the planned (B) Metro line. This last ordered image was acquired on March 2008 and has similar technical characteristics as the first one. The satellite imagery has the advantage of providing coherent and comprehensive representation of earth’s surface objects being imaged. Regarding their content, they truthfully reflect the facts on the ground at the time of acquiring the image (Lillesand and Kiefer, 1979; Detrekoi et al, 1996). However, in a city like Tripoli undergoing dynamic development and extremely rapid changes, the facts on the ground change fast too. Another important reason supporting the choice of satellite imagery as a base map is that such images can easily be modified to suite the computer assisted planning of the project, this is achieved with an acceptable relative accuracy (Alhusain, 2007). Unfortunately, the nominal 2.5 m horizontal accuracy provided by the distributor of the images didn't prove to be true in all cases, especially in real life applications. This was especially critical issue when fitting and harmonizing some technical aspects of this project to other similar significant development projects executed in Tripoli. Coordinates transformations carried out on imagery didn't bring satisfactory results, for this reason a process of co-registration by identifying identical points on different multi-temporal images and carrying out local image transformations became necessary. Further significant problem was that the satellite imagery did not contain altitude information. Overall, after carrying out the necessary geometric corrections, transformations, and co-registration the ordered satellite imagery has satisfied the required accuracy needs. By producing the necessary orthomaps it was possible to greatly facilitate the field work of the Metro planning teams and to support the in- office work of Metro lines design, and imposition of Metro stations in their suitable locations. Nonetheless, the acquired images proved to be cost effective solution during the course of establishing the concept of the traffic study and the decision making process of the Metro network. At the same time satellite imagery constitutes correct and impressive technical basis for International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B7, 2012 XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia documentation and presentation of plans and technical solutions prepared through the traffic study (Alhusain, 2007; Engedy 2008). 3. MAPS USED IN THE PLANNING STUDY REVISION During field visits, and data collection activities of January 2008. Our company and its teams got in contact with other experts responsible for planning and execution of similar big development projects in Tripoli. One of the important meetings took place between our teams and the Swedish subcontractor of the National Consulting Bureau of Libya (NCB). The NCB and its Swedish subcontractor are responsible for the city's future urban development; specifically they are working on the "Third Generation Planning Project” which envisages the urban development of the city until the year 2025. The managers of this project had indicated that their task, besides preparing the development plans for the city and its surrounding region, was to create totally new and modern technological principals dependent base map. This base map relies on 10 cm resolution aerial photographs acquired over Tripoli in 2008. Expert-level meetings between our teams and the NCB's have shown that the finished parts of the base map also constitute a useful tool capable of supporting the demands dictated by mapping tasks of the Revision of the Metro Planning Study. Steps were taken by our contracting partner (RPEMB) to provide us with these aerial photographs, the efforts of our partner were successful, and we received the aerial photographs in August 2008, figure 5, shows an example of these photographs. Aerial photographs serving as the basis for producing the base map were acquired over Tripoli in autumn of 2006 and the beginnings of 2007. Flight height was 1000 m, out of the raw aerial photographs ortho photographs of 10 and 30 cm/pixel resolution were produced. Photogrammetric data capturing of the aerial photographs to produce vector maps has begun at the (NCB). Figure 5. Aerial photograph covering one of the Metro planning areas The (NCB) provided our experts a 30 cm/pixel resolution ortho photograph mosaics. According to their information, these mosaics in their present form are not considered to be a final

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