Remote sensing for resources development and environmental management: Remote sensing for resources development and environmental management

damen, m. c. j.

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Multivolume work

Persistent identifier:: 856342815

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856342815

Language:: English

Additional Notes:: Volume 1-3 erschienen von 1986-1988

Editor:: Damen, M. C. J.

Document type:: Multivolume work

Volume

Persistent identifier:: 856662364

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Scope:: VI, Seiten 959-1074

Year of publication:: 2016

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856662364

Signature of the source:: ZS 312(26,7,3)

Language:: English

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

Editor:: Damen, M. C. J.

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:: Volume

Collection:: Earth sciences

Chapter

Title:: Invited papers

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Small Format Aerial Photography for analysing urban housing problem (Case study: Bangkok Metropolitan Region). C. Chanond & C. Leekbhai

Document type:: Multivolume work

Structure type:: Chapter

Symposium on Remote Sensing for Resources Development and Environmental Management/Enschede /August 1986 © 1987Balkema, Rotterdam. ISBN 90 6191 674 7 993 Small Format Aerial Photography for analysing urban housing problem (Case study: Bangkok Metropolitan Region) C.Chanond & C.Leekbhai National Housing Authority, Bangkok, Thailand ABSTRACT Small Format Aerial Photography (SFAP) made with a light aircraft has been used to provide a low cost data base for analyzing housing and landuse problems of the Bangkok Metropolitan Region (BMR). Photography and navigation over the 5000 sq.km area was done by a professional aircrew of the Royal Thai Air Force Reconnaissance Squadron. The cost of airphoto was 5 times less than that of large format. This paper gives some details about the SFAP flight and discusses in detail the methodology applied for the housing stock inventory. Airphoto interpretation was done from enlarged prints of the 55mm B & W 1:52,000 negatives. Major landuses including vacant land for potential housing were counted from the airphotos, although in some cases area based estimates were used. Some of the results from the study are also given. 1 INTRODUCTION Bangkok, the capital of Thailand is an outstanding example of a primate city. Bangkok’s population in 1985 was estimated at 5.6 million people which is fifty times larger than the next largest city: Chaingmai. Its increase, resulting from in-migration alone is equal in scale to that of one Chaingmai each year. The high rate of population growth and massive migration from rural areas, both seasonal and permanent, have adversely effected the human settlement within the city. The government is examining ways to improve urban efficiency through integrated urban development by integrating sectoral investment programs into one regional investment program. In April 1984, the government requested the National Economic and Social Development Board (NESDB) and the International Bank for Reconstruction Development (IBRD) to carry out a joint pre investment study for the 6th Five Year Plan (1987 - 1991) relating the future of Bangkok Metropolitan Region (BMR). The study was confined to population and employ ment, urban transport housing and the urban poor, water resource and public finances, and should give an overview and a synthesis of the trends of change over the past 10 years as a basis for a prognosis of the changes over the next 10 years and beyond. The sectoral study of housing and the urban poor was assigned to the Center for Housing and Human Settlement Study (CHHSS), National Housing Authority (NHA). The Housing is particularly important because much of the physical development of the region is, and will be, residential. 2 DATA NEEDS FOR THE HOUSING SECTOR The terms of reference for this sectoral study indicated: 1) Assessment of the change in the housing stock over the last 10 years in terms of composition quality, quantity and locational aspect. Areas where current problems are particularly severe should be indicated. 2) A review of available information on housing demand. 3) Other aspects of the housing market such as the availability of land and housing finance, and potential housing locations for the Sixth Five Year Plan. The terms of reference suggested the use of census data to determine how the condition of housing stock has changed in the last decade by substracting the number of units in 1970 from those in 1980. When the study was commenced, it was found that the housing census tape of 1970 is no longer available. In the 1980 housing census, dwelling units are not quan tified, only the number of households in various types of dwelling is provided. In addition, the tabulations in the census report of 1970 and 1980 provide very few indicators of the quality of housing. The conclusion was that available data could not be used to compute the changes in housing condition with much confidence. Other approaches such as the use of updated large scale maps, the building record register or ground survey, have been examined but it was found that no single method could be used alone for the following reasons: - Available urban maps cover only part of the built-up area . - In the building records, housing units are not counted separately. - Ground survey would be too labourious and time consuming. The alternative for providing a reasonably ac curate quantitative and locational assessment of the change was to compare the 1974 1:10,000 airphotos, with new airphotos to be taken in 1985. The use of airphotos would enable the collection of much information quickly, reliable and economical. As airphotos portray the physical mor phological structure as it is in all its aspects, a combination of issues can be studied at the same time. Moreover, the accuracy of data obtained can be confirmed afterwards.

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