analysis of light intensity data by the dmsp/ols satellite...
TRANSCRIPT
![Page 1: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/1.jpg)
EDITORIA, The University of Tokyo
Analysis of Light Intensity Data by the DMSP/OLS Satellite Image Using Existing Spatial
Data for Monitoring Human Activity in Japan
XXII ISPRS Congress 2012 Melbourne, Australia Aug. 25- Sep. 1, 2012
Yuki Akiyama
The University of Tokyo, Japan Earth Observation Integration & Fusion Research Institute
![Page 2: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/2.jpg)
EDITORIA, The University of Tokyo
Outline
1. Background and objective
2. Study area
3. Data development and Analyses
4. Conclusion
![Page 3: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/3.jpg)
EDITORIA, The University of Tokyo
Outline
1. Background and objective
2. Study area
3. Data development and analyses
4. Conclusion
![Page 4: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/4.jpg)
EDITORIA, The University of Tokyo
1.Background and objective
・Monitoring for location and shape of urban areas are very significant task for planning urban management in broad metropolitan areas.
・However, it is often the case that developments of basic spatial data are poor especially in developing countries.
↓ Many studies try to monitor locations and shapes of urban areas and human activity without dependence on existing spatial data. One of such method is to use nighttime images (DMSP/OLS) by NOAA/NGDC.
1
![Page 5: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/5.jpg)
EDITORIA, The University of Tokyo
1.Background and objective
Examples of urban monitoring by the DMSP
2
Urban monitoring by the DMSP
・Estimation of damaged urban areas by earthquakes (Kohiyama et al.(2000))
・Estimation of building distribution (Takahashi and Hayashi (2001))
・Expansion monitoring of urban areas in some major cities around the world (Small et al. (2005))
Relationship analysis between the DMSP and other data
・Relationship analysis between DMSP night light intensity with business activity or electricity consumption (Elvidge et al. (1997))
・Relationship analysis with population distribution (Dobson et al. (2000))
・Relationship analysis with GDP (Ghosh et al. (2009))
![Page 6: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/6.jpg)
EDITORIA, The University of Tokyo
1.Background and objective
We can use DMSP data for free
3 http://www.ngdc.noaa.gov/dmsp/downloadV4composites.html
Cloud-free image data made using all the available archived DMSP-OLS smooth resolution data for calendar years (30 arc second grids, 180 to 180 degrees longitude and -65 to 75 degrees latitude.).
![Page 7: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/7.jpg)
EDITORIA, The University of Tokyo
1.Background and objective
4
Many studies have monitored distributions of urban areas and estimate human activities using DMSP/OLS images. ↓ On the other hand…
Which kinds of human activities are especially reflected in the DMSP/OLS images? are not clear. Because…
Detailed and reliable spatial data about human activity or urban facilities are not developed adequately.
![Page 8: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/8.jpg)
EDITORIA, The University of Tokyo
1.Background and objective
Objective
5
It is clear that DMSP data reflect which kinds of human activities to compare some existing spatial data in Japan. We use 3 kinds of micro-accurate spatial data in Japan as existing spatial data. 1) Road network data 2) Building polygon data 3) Dynamic population data DMSP and these 3 data are aggregated into same size grids and compare by single and multiple regression analyses.
![Page 9: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/9.jpg)
EDITORIA, The University of Tokyo
Contents
1. Background and objective
2. Study area
3. Data development and analyses
4. Conclusion
![Page 10: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/10.jpg)
EDITORIA, The University of Tokyo
2.Study area
6
Japan Tohoku region
・Total area :Approx. 6.69km2 ・Population: Approx. 9.2 million There are relatively broad suburban areas adjoined major cities and broad depopulated rural areas and mountain forest areas.
Sendai
Koriyama
Morioka
![Page 11: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/11.jpg)
EDITORIA, The University of Tokyo
Contents
1. Background and objective
2. Study area
3. Data development and analyses
4. Conclusion
![Page 12: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/12.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
7
DMSP image data (Raster data)
Road network data (Line data)
Building data (Polygon data)
Dynamic population data
existing spatial data of Japan
Reaggregation into same size gird polygons (1km square grid called “Japanese standard regional mesh Level 3”)
There are 69,814 girds in Tohoku region
![Page 13: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/13.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
7
DMSP image data (Raster data)
Road network data (Line data)
Building data (Polygon data)
Dynamic population data
existing spatial data of Japan
Reaggregation into same size gird polygons (1km square grid called “Japanese standard regional mesh Level 3”)
There are 69,814 girds in Tohoku region
![Page 14: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/14.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Reaggregation of DMSP data
8
・Grid size of DMSP data is 30arc seconds (about 820m in Tohoku region). ・Japanese regional mesh is 1km square. →DMSP values are reaggregated by following method.
Calculation of reaggregating DMSP value in mesh i
i
iSR
VSDVSDVSDVSDNV 44332211
![Page 15: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/15.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Reaggregating DMSP data
9 Image opportunities of Japan are approximately 8:00~9:00PM .
![Page 16: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/16.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
7
DMSP image data (Raster data)
Road network data (Line data)
Building data (Polygon data)
Dynamic population data
existing spatial data of Japan
Reaggregation into same size gird polygons (1km square grid called “Japanese standard regional mesh Level 3”)
There are 69,814 girds in Tohoku region
![Page 17: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/17.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Reaggregation of road data
10
・Road network data was developed by the national census map data in 2005 provided by Center for Spatial Information Science, The University of Tokyo. ・ This data contains line data of highway, main road and other road. →Load length grid data can be developed to split this line data by the Japanese regional mesh. ・Japan road association set the luminance level of road in Japan as following table.
Urban Suburban Rural
Highway 1.0 1.0 0.5
Main road 1.0 0.7 0.1Other road 0.7 0.1 0.1
Region typeRoad Type
How to define urban, suburban and rural areas of each grid?
![Page 18: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/18.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
How to define urban, suburban and rural areas?
11
・ National Land Information of Japan in 2006 contains polygon data of urbanization promoting areas, urbanization control areas and other areas.
・In this study, urbanization promoting areas are defined as urban area, urbanization control areas are suburban area and others are rural area. ・To overlay this polygon data with the regional mesh, all regional meshes gain regional information.
![Page 19: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/19.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
How to define urban, suburban and rural areas?
12
Reaggregating DMSP Zonal classification
![Page 20: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/20.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Reaggregation of road data
13
Mesh i (in Suburban area) 1. Calculate road length of each kinds of road
Highway (Red) = 120[m] Main road (Blue) = 210[m] Other road(green) = 250[m]
Urban Suburban Rural
Highway 1.0 1.0 0.5
Main road 1.0 0.7 0.1Other road 0.7 0.1 0.1
Region typeRoad Type
Luminance level of road in Japan
2. Multiple luminance level
Highway = 120[m] * 1.0 = 120 Main road = 210[m] * 0.7 = 147 Other road = 250[m] * 0.1 = 25
3. Get road distribution data
120 + 147 + 25 = 292
![Page 21: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/21.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Reaggregation of road data
14
Reaggregating DMSP
Road data
![Page 22: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/22.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
15
Correlation analysis between DMSP and road data
Independent variable(X): road grid data Dependent variable(Y): DMSP grid data
Number ofmesh
Correlationcoefficient ( R )
Coefficient ofdetermination(R2)
Whole area 69814 0.6234 0.3886
Urban area 2245 0.5745 0.3301Suburban area 5765 0.8122 0.6597Rural area 61804 0.6144 0.3775
Correlation in suburban area is relatively large.
![Page 23: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/23.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
7
DMSP image data (Raster data)
Road network data (Line data)
Building data (Polygon data)
Dynamic population data
existing spatial data of Japan
Reaggregation into same size gird polygons (1km square grid called “Japanese standard regional mesh Level 3”)
There are 69,814 girds in Tohoku region
![Page 24: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/24.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Reaggregation of building data
16
・Digital residential maps in 2008 (ZmapTOWN II, by ZENRIN CO., LTD) were used as building distribution data. ・Locations, shapes, areas, kinds of building, and use of almost all rooms everywhere in Japan can be collected using this data.
![Page 25: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/25.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Reaggregation of building data
17
Mesh i 1. Classify building use by attribute data Residential buildings: red Shops and office buildings: blue Multi-use buildings: green
Room type number of rooms
Personal house 10
Shop and office 2Others 3Total 15
Room information
100㎡ 100㎡
80㎡
400㎡ 500㎡ 2. Calculate light intensity values by buildings without multi-use building
S = 280 V = 280 *0.5 = 140 S = 400 V = 400 * 2 = 800
3. Calculate light intensity values by multi-use building
S = 500 V= 500 * {(0.5*10 + 2*2)/15} = 300
4. Get building distribution data
140 + 800 + 300 = 1240
![Page 26: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/26.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Reaggregation of building data
18
Reaggregating DMSP Bldg distribution data
![Page 27: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/27.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
19
Correlation analysis between DMSP and bldg data
Independent variable(X): building distribution grid data Dependent variable(Y): DMSP grid data
Correlation in suburban area is relatively large.
Number ofmesh
Correlationcoefficient ( R )
Coefficient ofdetermination(R2)
Whole area 69814 0.6153 0.3786
Urban area 2245 0.5076 0.2577
Suburban area 5765 0.7476 0.5589
Rural area 61804 0.6123 0.3749
![Page 28: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/28.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
7
DMSP image data (Raster data)
Road network data (Line data)
Building data (Polygon data)
Dynamic population data
existing spatial data of Japan
Reaggregation into same size gird polygons (1km square grid called “Japanese standard regional mesh Level 3”)
There are 69,814 girds in Tohoku region
![Page 29: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/29.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Dynamic population data
20
・The Agoop Data in 2009 (AGOOP Corp.) were used as distribution data of estimating dynamic population. ・Estimating dynamic populations in each month and each hour can be monitored by the unit of the regional mesh. ・Estimating dynamic population are calculated to integrate GPS logs by mobile phones with some kinds of statistical data. ・In this study the Agoop Data between 20:00 and 21:00 were used because image opportunities of the DMSP are also between 20:00 and 21:00.
![Page 30: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/30.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Dynamic population data (20:00-21:00)
21
Reaggregating DMSP Dynamic population data
![Page 31: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/31.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
22
Correlation analysis between DMSP and dynamic population data
Independent variable(X): dynamic population data Dependent variable(Y): DMSP grid data
Correlations in each area are not large. >DMSP cannot monitor actual distribution of population appropriately.
Number ofmesh
Correlationcoefficient ( R )
Coefficient ofdetermination(R2)
Whole area 69814 0.3615 0.1307
Urban area 2245 0.2584 0.0668Suburban area 5765 0.5336 0.2847Rural area 61804 0.3552 0.1262
![Page 32: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/32.jpg)
EDITORIA, The University of Tokyo 23
3.Data development and analyses
DMSP image data (Raster data)
Road network data (Line data)
Building data (Polygon data)
Dynamic population data
existing spatial data of Japan
![Page 33: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/33.jpg)
EDITORIA, The University of Tokyo 23
3.Data development and analyses
DMSP grid data (1km grid)
Road grid data (1km grid)
Building grid data (1km grid)
Dynamic population data
(1km grid)
existing spatial data of Japan
Dependent variable (Y)
Independent variables (X1, X2, X3)
Multiple regression analyses
![Page 34: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/34.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
24
Result of multiple regression analyses Significance levels of analyses in each area are 95%.
Using these values, we can monitor which independent values have the strongest impact for DMSP images.
Whole area Urban area Suburban area Rural area
0.6735 0.5959 0.5224 0.4826
0.4536 0.3551 0.2729 0.23290.4536 0.3542 0.2725 0.23289.6745 11.6262 13.0607 7.076169814 2245 5765 61804
Intercept 6.863 35.843 22.612 4.910Road 0.0018865 0.0008254 0.0015749 0.0016717Building 0.0002392 0.0000814 0.0005255 0.0029940Dynamic population 0.0000726 0.0000501 0.0001448 0.0003788Intercept 175.329 79.017 96.831 23.315Road 95.1163943 18.0746061 19.2717919 51.6165023Building 87.0567910 8.8593756 17.8187962 56.2256234Dynamic population 23.4419122 2.0332598 0.2761974 17.1764813Road 1.2723 0.9840 1.3376 0.9639Building 0.6691 0.3857 0.4162 1.3328Dynamic population 0.1990 0.0940 0.1674 0.5092
Critical F-value 0 7.7643E-213 0 0
Adjusted R2
Correlation coefficient Coefficient of determination
Standard deviationNumber of mesh
Coefficient
Standard paritalregression coefficient
t-value
![Page 35: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/35.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
25
Result of multiple regression analyses
・Impacts by road distribution are strong in urban and suburban areas. ・ Impacts by building distribution become strong in suburban and rural areas. ・There are few affects by dynamic populations.
Whole area Urban areaSuburban
areaRural area
Road 1.2723 0.9840 1.3376 0.9639
Building 0.6691 0.3857 0.8162 1.3328
Dynamic population 0.1990 0.0940 0.1674 0.5092
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1.6000
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EDITORIA, The University of Tokyo 26
3.Data development and analyses
DMSP grid data (1km grid)
Road grid data (1km grid)
Building grid data (1km grid)
Dynamic population data
(1km grid)
existing spatial data of Japan
Dependent variable (Y)
Independent variables (X1, X2, X3)
Regression formulas in each area
Estimating DMSP values
![Page 37: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/37.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Estimating DMSP data by the results of multiple regression analyses
27
Real DMSP Est. DMSP
![Page 38: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/38.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Regression analysis between estimating DMSP and real DMSP
28
![Page 39: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/39.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Map of Real DMSP / Estimating DMSP values
29
・Blue areas Grid values of real DMSP are much smaller than est. DMSP.
・Green areas Difference between them are small. ・Red areas Grid values of real DMSP are much larger than est. DMSP.
![Page 40: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/40.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Map of Real DMSP / Estimating DMSP values
30
They locate on roads and small villages in rural areas.
・Blue areas Grid values of real DMSP are much smaller than est. DMSP.
![Page 41: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/41.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Map of Real DMSP / Estimating DMSP values
30
・Red areas Grid values of real DMSP are much larger than est. DMSP.
They locate around cities like ring shape because of light saturation.
![Page 42: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/42.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Map of Real DMSP / Estimating DMSP values
30
・Red areas Grid values of real DMSP are much larger than est. DMSP.
![Page 43: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/43.jpg)
EDITORIA, The University of Tokyo
3.Data development and analyses
Map of Real DMSP / Estimating DMSP values
31
・Red areas Grid values of real DMSP are much larger than est. DMSP.
Misawa airbase
Ski resorts
Airport and large factories
Nuclear power plants (Fukushima-daiichi and Fukushima-daini)
Human activity in these areas are small, However light intensity is large.
Other reasons
![Page 44: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/44.jpg)
EDITORIA, The University of Tokyo
Contents
1. Background and objective
2. Study area
3. Data development and Analyses
4. Conclusion
![Page 45: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/45.jpg)
EDITORIA, The University of Tokyo
4.Conclusion
32
・This study shows how much can be monitored various human activities using nighttime images of the DMSP/OLS in Tohoku region, Japan. ・Light intensity by the DMSP/OLS correlates strongly with road distribution in urban and suburban areas and building distribution in rural areas. The correlation with dynamic population is weak in all areas. ・Results of multiple regression analysis show that road distribution has a major effect on the light intensity of the DMSP/OLS in urban and suburban areas and building distribution in rural areas.
![Page 46: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/46.jpg)
EDITORIA, The University of Tokyo
4.Conclusion
33
・Estimating light intensity based on 3 factors can explain actual light intensity by the DMSP/OLS relatively well. > It means that the light intensity by the DMSP/OLS can monitor various kinds of lights radiated by human activities appropriately. ・The DMSP/OLS cannot monitor distributions of some roads and small towns and villages in rural areas. ・Effects of saturating light in suburban areas from city centers and facilities radiating strong light in suburban and rural areas should be considered.
![Page 47: Analysis of Light Intensity Data by the DMSP/OLS Satellite ...akiyama-lab.jp/yuki/paper/2012/ISPRS2012_ppt_YukiAkiyama.pdfSignificance levels of analyses in each area are 95%. Using](https://reader033.vdocuments.net/reader033/viewer/2022061002/60b0f7c62097bd09a56bdbc2/html5/thumbnails/47.jpg)
EDITORIA, The University of Tokyo
Thank you for your kind attention!
Contact
Yuki Akiyama
Email: [email protected]
Phone: +81-3-5452-6417
Acknowledgment