landusemonitoring bysatelliteimages

Transcription

1 landusemonitoring bysatelliteimages --- urban growth descripted by satellite images --- statistical comparison of the results by Ingrid Christ and Dr. Rolf Lessing

2 agenda. methodology of satellite image analysis examples description of land use change over 20 years analysis of urban growth in different zones of Hanoi analysis of urban growth among main roads and without main roads futureaspects conclusion 2

3 methodologyaspects. ourmaintaskin REMON was: development of a method for a semi-automatic classification of satellite images with different quality development: using a method by our own, called econstruction 3

4 methodeconstruction. using Construction a point is defined a a representative of the image Inputdata of different sources can be analysed by adequate rules (e.g. radius, method). Herewith the features of the representative are build. The features were analysed by newtechnologies, dependingon the question 4

5 date Satellite Sensor Spectral resolution Geometric resolution Landsat MSS 4 (blau, rot, NIR1, NIR2) 57 x 57m² (79x 79m²) LandsatTM5 7 (blau, grün, rot, NIR1, MIR1,PAN, MIR2) LandsatTM5 7 (blau, grün, rot, NIR, MIR1,PAN, MIR2) LandsatETM7 9 (blau, grün, rot,nir, MIR1, TR1, TR2, MIR2, PAN) LandsatETM7 9 (blau, grün, rot,nir, MIR1, TR1, TR2, MIR2, PAN) LandsatETM7 9 (blau, grün, rot,nir, MIR1, TR1, TR2, MIR2, PAN) LandsatETM7 9 (blau, grün, rot,nir, MIR1, TR1, TR2, MIR2, PAN) Radiometr. resolution 8 Bit (256) 30 x 30m² 8 Bit (256) 30 x 30m² 8 Bit (256) 30 x 30m² 8 Bit (256) 30 x 30m² 8 Bit (256) 30 x 30m² 8 Bit (256) 30 x 30m² 8 Bit (256) WorldView II 5 (blau, grün, rot, NIR, PAN) 2 x 2m² 11 Bit (2.048) RapidEye 5 (blau, grün, rot, Red Edge, NIR) 5 x 5m² 16 Bit (65.536) RapidEye 5 (blau, grün, rot, Red Edge, NIR) 5 x 5m² 16 Bit (65.536) RapidEye 5 (blau, grün, rot, Red Edge, NIR) 5 x 5m² 16 Bit (65.536) RapidEye 5 (blau, grün, rot, Red Edge, NIR) 5 x 5m² 16 Bit (65.536) 5

6 landsatimage

7 landsatimage

8 landsatimage

9 rapid eyeimage

10 landusechangein Hanoi

11 landusechangein Hanoi

12 landusechangein Hanoi

13 landusechangein Hanoi

14 analysisofurban development. zones axes 14

15 analysisofurban development. sealedareas= conclusionofsettlementsofdifferent agglomeration and industry areas investigations: thedevelopmentofthesealedareasin thedifferent zones overthelast 20 years the difference between the development along a main road versus the development without a main road zones axes 15

16 sealedareas(relative) over20 years. Zone 4 km Zone 8 km Zone 12 km Zone 20 km 16

17 sealedareas(relative) over20 years. Zone 4 km? Zone 8 km Zone 12 km Zone 20 km 17

18 sealedareas(absolut) over20 years. Zone 8 km Zone 12, 16, 20 km Zone 4 km 18

19 sealedareas(absolut) over20 years. increase of urban areas > 10 km²/year Zone 8 km increase of urban areas ~ 2.00 km²/year ~ 1.25 km²/year ~ km²/year Zone 12, 16, 20 km Zone 4 km sum for Hanoi > 40 km²/year 19

20 comparisonofdifferent axes. 20

21 comparisonofdifferent axes

22 comparisonofdifferent axes

23 comparisonofdifferent axes

24 comparisonofdifferent axes

25 comparisonofdifferent axes. axes5 development along main road axes2 development without main road axes1 and3 25

26 futureaspects. monitoring urban growth by satellite images will increase andgeta loteasier: methods for classification urban features will get more and more public radardata(e.g. Sentinel1) will beavailableevery11 days (independenceofclouds) moreandmoresatelliteimagesareavailablefreetouse Spatial Data Infrastructures(SDI) allows an easy integration of satellite images into existing information systems 26

27 futureaspects. 27

28 conclusions. attheend ofmypresentationletmesay Thanksa lot! tothebmbfforthefinancialsupportoftheproject tomycolleaguesingrid Christ, Philipp Lehmann andmario Stutzki for there engagement, for there ideas and for there patience tomatias Ruiz LorbacherandSon Le for the coordination of this big project, for there patience and for there constancy to manage the project, not only between the german partners, but over this great distance to Hanoi To Nguyen Phuong Hien for the coordination between the different organisations in Hanoi and for her support during the validation of our results 28