Journal of Geo-information Science >
Site Selection of Multi-objective Survey
Received date: 2018-03-14
Request revised date: 2018-07-12
Online published: 2018-10-17
Supported by
National Natural Science Foundation of China, No.41671444.
Copyright
The social survey questionnaires sometimes are multi-objective, and some objectives are attribute data or category variables. However, traditional spatial sampling theory is primarily used in single-target and non-attribute data. It is not suitable for the investigation required multi-type target objects. A new method based on variability model was proposed in this paper. The different types of variables can be measured by variability model on the spatial variability and used as the basis for spatial stratification to design sampling plan. Depending on the questionnaire about residents' daily travel energy consumption of Xiamen Island and historical data in this study, we calculated the values of variability of samples by the model and get the map of spatial distribution. Contrasted with the map of hierarchical combination of the integrated factors and the map of stratified sampling by experts,it got the value of variability through the pre-investigation, ultimately obtained program of sampling point distribution about the target settlement of Xiamen Island. The results showed that: (1) Contrast to experts layer, the main component layer and combination of factors layer from the perspective of variability values, combination of factors layered approach is more reasonable. This method reflects various factors that affect sampling in spatial distribution plan, which offers solution for the survey involving multiple data category and expands the application scope of “Sandwiches” model. (2) The number and distribution of samples are affected by variance in the sandwiches spatial Sampling. But they are not increased with the increase of variance, the number and the distribution of samples are affected by many factors, the size of the geographical space is one factor. (3) Variability model quantified various types of data about Sampling objectives successfully. In our study, we got more detail sampling plan based on pre-investigation in small range. The sampling accuracy is 0.0002while sample size is 35. It meets the practical requirements of the survey of Xiamen. The number of samples and the accuracy are controlled in the reasonable range. Not only we saved manpower and material resources, but also, we improved the accuracy of sampling.
Key words: multi-objective sampling; multi-type data; variability; social survey; Xiamen
CAO Xin , LI Xinhu , GAO Liling , XING li . Site Selection of Multi-objective Survey[J]. Journal of Geo-information Science, 2018 , 20(10) : 1381 -1387 . DOI: 10.12082/dqxxkx.2018.180130
Fig. 1 The sampling process based on variability model图1 变异度模型在抽样中的应用流程 |
Fig. 2 Location map of Xiamen图2 厦门区划以及地理位置图 |
Tab. 1 Weight of factors affected sampling表1 影响抽样的各因素权重值 |
类别数据 | 数值数据 | ||||||||
---|---|---|---|---|---|---|---|---|---|
因素 | 居住类型 | 性别 | 职业 | 上班出行方式 | 购物出行方式 | 家庭成员数 | 上班出行耗时 | 购物出行耗时 | |
权重 | 0.18 | 0.15 | 0.14 | 0.12 | 0.09 | 0.13 | 0.11 | 0.08 |
Fig. 3 Stratified map of influencing factor图3 影响因素分层图 |
Tab. 2 Stratified map of combination factors表2 综合因素分层表 |
人口密度与地形分层 | 基准地价层 | ||||
---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | |
0 | 1 | 1 | 1 | 1 | 1 |
1 | 2 | - | - | 2 | - |
2 | 2 | - | - | - | 2 |
3 | - | - | 3 | - | 3 |
4 | 4 | - | 4 | 4 | - |
5 | - | - | 4 | 4 | - |
6 | 5 | - | 5 | 5 | 5 |
Fig. 4 Map of stratified combination factors图4 综合因素分层 |
Tab. 3 Variability in stratified combination factors表3 各分层图中变异度值 |
分层级数 | 综合因素分层变异度 |
---|---|
1 | 0 |
2 | 0.11 |
3 | 0.11 |
4 | 0.12 |
5 | 0.12 |
注:变异度为“0”表示特殊地形(山或者湖泊),人口几乎为0此区域不适合问卷调查 |
Fig. 5 Distribution map of samples settlements图5 住区样点分布图 |
The authors have declared that no competing interests exist.
[1] |
|
[2] |
[
|
[3] |
[
|
[4] |
[
|
[5] |
[
|
[6] |
|
[7] |
[
|
[8] |
[
|
[9] |
|
[10] |
[
|
[11] |
[
|
[12] |
[
|
[13] |
[
|
[14] |
[
|
[15] |
[
|
[16] |
[
|
[17] |
[
|
[18] |
[
|
[19] |
[
|
[20] |
[
|
[21] |
[
|
[22] |
[
|
[23] |
[
|
[24] |
[
|
[25] |
|
/
〈 | 〉 |