Settlement Accesssubility: A case study in the south east part of chiangmai city, Thailand
Suharyadi
Gadiah Mada University,Yoayakarta, Indonesia
Abstract
A settlement accessibility survey based on aerial photographs as main data sources and using a scoring has been applied in chiangmai city. Panchromatic aerial photographs scale 1:10.000 made in were used tom carry aerial out the survey .two different t yes of data are derived from photo interpretation settlement an medium pattern and density as a mapping unit in graphic data and parameters of settlement accessibility as attribute data. So parameters are used in the width of minor local sterol quality of major street width of minor local street distance to public transport line distance to railway station and distance to main road for analyses data about settlement accessibility from photo interpretation and field survey are normalized with value. The value training from 1to 8 to reflect the relative important of the parameter are used weighting factors. Data process and analyses were carried out with the help of a geographic information system CILWIS software package the result of the sunrise are combination graphic and attribute data bases in table and map form.
Introduction
The is the second largest city of Thailand .The city growth has been rapid in the last two decades as a result .the city plan and administrations have to deal with problems related to the increase in demand of improvement maintenance infrastructure and facilities in the city.
In leap up with the growth the city planners and administrators need accurate detailed information on urban problems with in shell time. The type of information useful for planning is settlement accessibility data over the city this data would illustrate facilities related to accessibility available in the city.
In many cases there are difficulties in providing the data due to financial and time constrains. Especially when conventional filed survey should be considered as an alternative aerial survey can provide most of the needs planners rapidly with relative economy and accuracy.
Data collection is not the only step also data processing and analysis have to take palace as soon as possible by using geographical information system it is possible to increase speed in data processing and analysis.
Study Area
The whole should be covered in a study like this accessibility of the different part of the city could be detected and areas indicated where are necessary but due to time constrains only part of the city was selected. the survey has been carried out in the south east part of damages background for selection this study are conditions of settlement and Varity of facilities available there the boundaries of the area are there road for the pattern ping river for the western super high way for the western and municipality boundary as south boundary as south location of study area.
Objectives of the survey
The details of models of settlement accessibility using are photoing as main source of data in aerial the like of settlement accessibility in south east and CHAINGMAI city. Base on the model.
In areas the use frames of aerial photographs for providing data in settlement accessibility survey.
Concepts Used.
Settlement area with an inform pattern and density uniform is residential an be regular and on semi replay pattern can be regular represents comparison of roof cover and land occupied density represents comparison of settlements are grouped in three class i.e. a the density of settlements has more 70% roof cover semi dense is 40% and low than 40%.
Parameter of settlement accessibility.
Width of major quality of major street width of minor local street quality of local street distance to public local street transportations distance to railway station and distance to main whole most of the parameter are provider by interpretation of photographs information on public transport line is taken from secondary data for checking of the photo interpretation and providing additional data a field survey took place in the study store.
Method of the survey.
The method survey in brief can be in the flow chart on the figure. 2 aerial photographs panchromatic scale (f : 10.000)made in 1987 were used to carry out the two different of data are derived from photo interpretation settlement with a uniforms pattern and density as mapping unit in graphic data. And data of settlement accessibility attribute data.
Figure.1 Location of study area
Figure.2 Flow chart of the survey
The procedure to get data is as follow three general groups of land use are identified in the study area base on photo interpretation these are settlement built up area non settlement and non built area with in the settlement delineations a detailed delineations is made according uniformity of the pattern and density of house with assumed that a settlement with and density of house with uniform pattern and density is homogenous in facilities related to accessibility settlement with an uniform pattern and density than are used as mapping unit in data consuming data base interpretation and measurement of data concerning settlement accessibility through the aerial photographs quality of street for both major and local main road distance to railway station .
