Geomatics Synthesis Project 2011 - Hydro Campus

This presentation summarizes a research projected conducted by second year students of the master programme of Geomatics at the Delft University of Technology.

The aim of the project was to create an extensible 3D model of the University's campus that can be used for climate simulations.

Transcript

1. Geomatics Synthesis Project 2011 FINAL&& !PRESENTATION&&
2. Outline !  Introduction !  3D Model !  Storage solution !  Rainfall runoff simulation !  User Interface !  Verification & validation !  Conclusions & recommendations 2&
3. Background information 3& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
4. Background information 4& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
5. Background information 5& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
6. Ideas 6& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
7. Objectives ! &Main!obje3ve:!! Create&a&3D&model&of&TU&Del9&campus&which&will&be& used&as&input&for&rainfall&&runCoff&simulaEon.& & ! !Sub!objec3ves:! I.  3D&model&with&appropriate&resoluEon& II.  Demonstrate&feasibility&to&perform&rainfall&runCoff&&& analysis& & ! !Poten3al!objec3ves:! !!!!!!!To&produce&a&user&interface! & 7& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
8. Process 8& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
9. Delineation Behind!waterbody! Schoenmakerstraat! S3eltjesweg! Mekelweg! & Includes! Water& VegetaEon& Buildings& Relief& 9& Area! Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
10. Delineation 10& Buildings! Aula& Library& Faculty&of&Physics& & ! Includes! Δ&Relief& Δ&Shape& Δ&Roofing& Δ&Footprint&vs&Roofprint& & Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
11. Delineation 11& Excluded! Trees& Fieldwork& Hydrology&modeling& & Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
12. 3D Model Overview ! !Input!data& ! !Geometry! ! ! !Image!classifica3on! & 12& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
13. Input Data – AHN-2 ! &NaEonal&LIDAR&Dataset& ! &16&points/m2& ! &2008&Acquired& 13& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
14. Input Data – GBKN ! &Large&Scale&Basemap& ! &Scale&1:500&–&1:5,000& ! &Most&up&to&date& ! &Requires&manual& adjustment& 14& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
15. Input Data – Orthophotos 15& ! &For&Image&ClassificaEon& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
16. Geometry – Modeling approach ! &2.5D&surface&model& ! &Buildings& ! &Terrain& ! &TriangulaEon&based& ! &Using&freely&available&&&&&&&& tools& ! 16& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
17. Geometry – LAS processing ! &Convert&AHNC2&input& files&to&LAS& ! &Merge&and&Clip& ! &Classify:&Building,& vegetaEon,&ground& 17& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
18. Geometry – Basemap elevation ! &No&elevaEon&data&in&basemap& ! EsEmated&from&the&average&of&nearby&terrain& points& ! 18& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
19. Geometry – Outlier Removal ! Remove&remaining&sparse&points&on&building&walls& 19& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
20. Geometry – Triangulation ! &2D&Delaunay&triangulaEon& ! &Basemap&constrained& 20& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
21. Geometry – Simplification ! &Preserve&shape&but&minimize&number&of&faces& ! &Using&quadric&edge&collapse&decimaEon& 21& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
22. 22& Geometry Result Problems ! &Some&tools& ! &Slow&or&not&scalable& ! &MisclassificaEons& ! &Validity&of&geometry&not&guaranteed& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
23. Image classification – Approach 1 ! &Based&on&orthophotos& ! &Use&basemap&polygons& ! &Use&ArcGIS&maximum&likelihood&classificaEon& 23& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
24. Image classification – Approach 2 ! &Classify&separately&buildings&&&terrain&& ! &SemiCautomaEc&classificaEon& ! &Assign&polygons&class&by&plurality&vote& ! &Manual&check&for&misclassificaEons& 24& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
25. Image classification – Results 25& Grass,!Grass,!Asphalt,!Concrete,!Water! Grass,!Concrete,!Ruberdal,!Asphalt! Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
26. Image classification – Considerations ! &Manual&correcEon&required& ! &CorrelaEon&spectral&material&properEes&and& hydrological&parameters&is&not&selfCevident& 26& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
27. Storage Solution Overview 27& ! &3D&Objects& ! &AppliaEon&Domain&Extensions& ! &CityGML&Database&Storage& ! &CityGML&export&tool& & Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
28. CityGML: 3D City model 28& ! !Representa3on!&!exchange!of! •  & Buildings && •  & Relief&& •  & Water&Bodies& •  & Infrastructure& •  & VegetaEon& ! !Geometries! ! !Topologic!rela3onships! ! !Seman3cs! & & Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
29. CityGML Application Domain Extensions 29& & !! ! !Hydro!RunOff!ADE! ! !Building!roofs! !!Surface&material& &&&&&&Drainage&characterisEcs& !  General! &&Surface&roughness& & !  Already!exis3ng!parameters! ! !Water&bodies& ! &TransportaEon&complexes& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
30. ! !Derived!from!3DCityDB! ! !PostgreSQL!&!PostGIS! • &Mapping&of&objects&and&hierachies& • &Inheritance&& ! !Unified!Geometric!representa3on!! • &Face&"3D&Polygon& ! Spa3al!opera3ons!available! • Only&2D,&3D&promised& Database Storage 30& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
31. Object Creation 31& & ! &Area&&&Class&C>&Object& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
32. Geometric Storage 32& ! !Aggregated!surfaces! • &N&records&+&1&representaEve& • &Set&alike&data&structure& • &Polygon&type& ! !2D!Spa3al!Opera3ons! • &Contains& • &Overlap& ! !3D!Objects! ID! Geometry! Root_id! 1& Polygon& 5& 2& Polygon& 5& 3& Polygon& 5& 4& Polygon& 5& 5& NULL& NULL& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
33. ADE Storage 33& ! &New&ahributes&#&new&columns& ! &New&objects&#&new&tables& ! &Inheritance&based& ID! RoofMaterial! 1& Asphalt& 2& Concrete& 3& Gravel& 4& 5& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
34. CityGML Export Tool 34& ! &Based&on&‘citygml4j’&library& ! &Java&& ! &Allows&integraEon&of&ADE’s& ! &Simple&per&object&extracEon& ! &CityGML&&1.0.0& ! &LGPL&licensing& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
35. CityGML Export Tool 35& ! &Ensures&data&exchange& ! &ImplementaEon&based&on&Open&Library& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
36. Rainfall Runoff Simulation Overview & ! &Input&data& ! &SimulaEon& ! &Results& 36& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
37. Input Data ! Geographical&model& ! Drainage&network& ! 3D&Model& ! Roughness&polygons& ! Void&Polygons& ! AddiEonal&data& ! Rainfall&events& 37& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
38. Input Data - Drainage network 38& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
39. Input Data - Drainage network 39& Import!Problems! Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
40. Input Data - Drainage network 40& Import!Problems! A& B& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
41. Input Data - Drainage network 41& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
42. Input Data – 3D model 42& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
43. Input Data – Roughness Polygons 43& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
44. Input Data – Void Polygons 44& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
45. Simulation – Mesh Generation 45& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
46. Simulation – Rainfall Events 46& 0& 100& 200& 300& 400& June&14th,&2011& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
47. Simulation – Run 47& Input parameters ! Drainage&network& ! Time&parameters& ! Rainfall&event& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
48. Simulation – Results 48& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
49. User Interface ! !We!have!a!3D!model! ! &How&to&use&it?& ! !Ideal!requirements! ! &Import,&export,&adjust&and&view&3D&model& ! &Seamlessly&handle&huge&datasets& ! &Visualize&simulaEon&results& ! !No!3me!for!implementa3on! Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations 49&
50. User Interface 50& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
51. Verification & validation 51& ! &Verifica3on! “Are&you&building&it&right?”& ! ! !Valida3on! “Are&you&building&the&right&thing?”& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
52. Verification 3D!Model! ! &Programmed&correctly;&& ! &Algorithms&implemented&properly;& ! &Contains&no&errors.& RR& •  Programmed&correctly;& •  Contains&no&errors& 52& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
53. Verification 3D!Model! ! &Programmed&correctly;&& ! &Algorithms&implemented&properly;& ! &Contains&no&errors.& RR! ! &Programmed&correctly;&& ! &Contains&no&errors.& 53& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
54. Validation 54& 3D!Model! ! &Building&errors&are&relaEvely&high;& ! &No&automated&geometry&validaEon.& RR! •  Based&on&these&images&;& •  Plausible&results;& •  No&Eme&for&expert&validaEon.& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
55. Validation 55& 3D!Model! ! &Building&errors&are&relaEvely&high;& ! &No&automated&geometry&validaEon.& RR! ! &Based&on&the&3D&model;& ! &Plausible&results;& ! &No&Eme&for&expert&validaEon.& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
56. Conclusions 3D!Model! ! &Possible&to&create&geometrical&surface&model;& ! &Used&tools&limit&the&applicability&of&the&approach;& ! &Automated&classificaEon&has&misclassificaEons.& Storage! Rainfall!runoff!simula3on! Overall! 56& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
57. Conclusions 57& 3D!Model! Storage! ! !Mapping&of&CityGML&into&a&geospaEal&DB&is&beneficial.! Rainfall!runoff!simula3on! Overall! Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
58. Conclusions 58& 3D!Model! Storage! Rainfall!runoff!simula3on! ! !Hydrology&experEse&is&required;& ! &Input&is&highly&dependent&on&selected&so9ware.! Overall! Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
59. Conclusions 59& 3D!Model! Storage! Rainfall!runoff!simula3on! Overall! ! &All&objecEves&were&met;& ! &Different&purposes&have&different&requirements;& ! &3D&model&can&be&used&to&perform&a&rainfall&runoff& simulaEon.& ! Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
60. 60& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
61. Recommendations 61& 3D!Model! ! &EsEmaEon&of&the&basemap&points’&elevaEon&with& spaEal&indexing& ! &Integrate&tools&&&libraries&using&an&efficient&internal& data&structure& ! &Use&of&spaEal&and&texture&informaEon&for& classificaEon& Storage! Rainfall!runoff!simula3on! Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
62. Recommendations 62& 3D!Model! Storage! ! !Mapping&should&be&expanded&to&cover&the&complete&& CityGML&specificaEon&! Rainfall!runoff!simula3on! Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
63. Recommendations 63& 3D!Model! Storage! Rainfall!runoff!simula3on! !  Increase&hydrology&knowledge;& !  InvesEgate&the&correct&configuraEon&of&the& simulaEon&model;& !  ValidaEon&by&expert;& !  Use&full&drainage&network&with&correct&capacity&and& depth&parameters& ! Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
64. 64& Introduction – 3D Model – Storage – RR – UI - V & V – Conclusions & Recommendations
65. 65& Supervisors Principal!Tutor! Prof.&dr.&M.&MenenE& & Project!Coaches! Ir.&E.&Verbree& Ir.&J.&Lesparre& ! Consultants! Prof.&dr.&ir.&F.&Clemens& Prof.&dr.&ir.&H.W.&J.&Russchenberg& !
66. Geomatics Synthesis Project 2011 QUESTIONS&& COMMENTS&&