Proceedings, XXth congress: Proceedings, XXth congress

Altan, M. Orhan

Bibliographic data

Multivolume work

Persistent identifier:: 1663674213

Title:: Proceedings, XXth congress

Sub title:: Istanbul, 12 - 23 July 2004

Year of publication:: 2004

Place of publication:: Istanbul

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 1663674213

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.; Auch bezeichnet als XXth International Congress for Photogrammetry and Remote Sensing

Editor:: Altan, M. Orhan

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Document type:: Multivolume work

Volume

Persistent identifier:: 166368779X

Title:: Proceedings, XXth congress

Scope:: IV, 226 Seiten

Year of publication:: 2004

Place of publication:: Istanbul

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 166368779X

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(35,B8)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.

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

Editor:: Altan, M. Orhan

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; 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:: MULTI-TRIANGULATION TO GET GCP FOR OLD UNPREMARKED AERIAL PHOTOGRAPHS Fahmi Amhar

Document type:: Multivolume work

Structure type:: Chapter

2004 MULTI-TRIANGULATION TO GET GCP FOR OLD UNPREMARKED AERIAL PHOTOGRAPHS Fahmi Amhar? * Researcher in Mapping & Technical Manager of Kalimantan Mapping National Coordinating Agency for Surveys and Mapping, Bakosurtanal Cibinong Science Centre, JI. Jakarta Bogor Km. 46 Cibinong, Indonesia Telp. /Fax. +62-21-87901254; email: famhar@telkom.net, famhar@yahoo.com TS 1 YF Youth Forum - Photogrammetry KEY WORDS: GPS/INS, georeferencing, identification, triangulation, photographs, orientation, adjustment ABSTRACT: If a large number of old aerial photographs is exist but there is no premarked ground-control- and also no kinematics-GPS on board of photo-centre-position for aerial triangulation, then the post GCP-survey would be very hard. The most problem is to identify the place on photographs to the current situation and to get the place. In the first part, the experience of such project in Kalimantan will be explained. In the second part is the idea how to accelerate and optimised the whole GCP survey. 1. BACKGROUND 1.1 General Condition Kalimantan (Borneo) is one of the largest islands in the world. The Indonesian part of Kalimantan is about 540,148 sqkm. The Island is just 43 % topographic mapped on 1:50.000 scale. A large part is not yet mapped due to: (1) the ever-cloudy situation; (2) the limited state budget to do systematic mapping over the whole island. During the Era of Soeharto's government, the ministry for forestry has obligated to all forest concession holder company to make aerial photographs for their concession area. Between 1990-1993, each company made their photographs used different camera, aircrafts etc. These aerial photographs are stored to the ministry as evidence of the forest situation. No topographic map is made from these photographs. After the end. of Soeharto's regime, there is new condition, which focused to re-use the photographs. The paradigm of district wide-autonomy has increased the consciousness of the district authorities of Kalimantan, that they need also qualified topographic map in middle and larger scale. This demand is pushed by the facts of increasing illegal logging, wild forest fire, and claim from indigenous people for land-common-right and other environmental problem. These entire problems are acute. There are some technology on the market to make topographical map for scale 1:50.000, ie. (1) airborne photogrammetry using existing (forestry) photos; (2) airborne photogrammetry using new photos; (3) SPOTS-Stereo or ASTER-Stereo; (4) Airborne Interferometric SAR (IFSAR); and (5) Lidar Imaging. Due to the budget constraints, and the cloud situation, the option (1) is in favor. The reason: topography data (DTM) is the most expensive part in topographic database and in the area is mostly not changed. Only the land cover is changed, and this should be updated from Landsat or Aster data. The option (1) shows the respect : of the current government to save money and re-use the existing assets. The problem is this concept never proven for a large area. ; In 2002 the National Coordinating Agency for Surveying and Mapping (Bakosurtanal) decided to use aerial photographs to make new topographic map for part of East Kalimantan, about 80,000 sqkm (8 Million hectare) to execute in 2003. The financing plans about 14000 aerial photographs to be processed in this year. : 1.2 The Selection of the Photographs About 70000 aerial photographs of scale 1:15.000 — 1:22.000 were made for forest concession holder. The large scale is while the aircraft had to fly under the cloud. The photographs would be made mainly on forest area; also not what in the time of capture was cities, swamps, big river etc. Different holder means different project, different camera, different scale, different numbering system on photos and different photo quality. It was very hard job to select adequate and useful photos. There are many overlaps between photos. In other location, there are also individual gaps where no any photo exists. The overlaps are caused by the fact that some company has taken photographs several times, by some reason (unsatisfying of the previous result, regular update to know the last forest situation after fires, cut off or replant). The last and best quality photo will be taken to the next process. The selection process used the photo-index database. Unfortunately, this database was in many cases inaccurate.

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