multisource data integration to prepare interactive 3d model of kathmandu university

Group Members:

Biplov Bhandari (04)Archana KC (09)Upendra Oli (19)Niroj Panta (20)Uttam Pudasaini (22)

Supervisors:

Shashish MaharjanGanesh Dhakal

Multisource Data Integration To Prepare Interactive 3D Model Of Kathmandu University

Final Presentation on:

Dated on: Friday, July 12, 2013

Tuesday, April 11, 20232

Presentation Outline

Multisource Data Integration to Prepare The Interactive 3D Model of Kathmandu University

Introduction

Rationale Objectives Resources Used Methodology Outcomes Work schedule Conclusion and Recommendation


Description Of The Project Title


Multisource Data Integration to Prepare a Interactive 3D Model of Kathmandu University

Spatial data acquired from different heterogeneous sources are being input into a common data base

The use of different data sources brings along many challenges.

For example, multiple data formats, various accuracies, coordinate systems and level of details must be taken into consideration




A digital representation of features, either real or hypothetical, in three-dimensional space

3D models represent a 3D object using a collection of points in 3D space, connected by various geometric entities such as triangles, lines, curved surfaces, etc




A 3-Dimensional representation of landscape and inanimate feature of Kathmandu University

Overlay of Photorealistic features made using Google Sketch UP over the 3D terrain made using Arc GIS(Arc map and Arc Scene) complete the model

Projection System details:

Projected Coordinate System: MUTM Central 87, False Easting= 500000, False Northing=0, Scale Factor=0.9999,Linear Unit =meter

Geographic Coordinate System : GCS Everest Bangladesh, Prime Meridian: Greenwich, Angular Unit=Degree

How were we able to synchronize the various file formats??



Some Common 3D File Formats

ABC – Alembic (Computer Graphics)

BLEND – Blender(.blend)

CTM – OpenCTM(.ctm)

DAE – COLLADA (.dae)

MRC – voxels in cryo-electron microscopy

U3D – Universal 3D file format (.u3d)

VRML97 - VRML Virtual reality modeling language (.wrl)

COLLABORATIVE DESIGN ACTIVITY An open-standard XML format for

storing 3D models.

Often used as an interchange format for 3D applications.

Also format for 3D textured objects stored inside KML.

File extension: .dae (digital asset exchange)

Exporting multipatch features to COLLADA allows sharing of complex analysis results with others and also provides a mechanism for updating textured 3D GIS data, such as buildings, using third-party software like SketchUp




Computerized maps that allow users to interface with various aspects of the maps themselves.

Offers following major options to the map user Zooming in or out on a specified location,

Panning easily between geographic areas

planning driving routes and Geocoding

Providing street/satellite views of a desired locale.

Permitting professionals the ability to interact, update, and make changes to the maps in real time.



Introduction

Rationale

Objectives Resources Used Methodology Outcomes Work schedule Conclusion and Recommendation References


Rationale: Why This Project


Kathmandu University being the leading institution of Nepal doesn’t have any means to disseminate the University map portals among its visitors, students and other stake holders

The two dimensional master plan without any spatial reference is still serving as the tool to visualize the spatial position of the University components

So a necessity of three dimensional map was felt which could serve as a tool to visualize all the features along with the terrain in digital form with the web access.



IntroductionRationale

Objectives

Resources Used Methodology Outcomes Work schedule Conclusion and Recommendation References


Objectives Of The Study


The main objective of the study is to prepare the 3D virtual model of the Kathmandu University showing the photo realistic buildings, roads, boundary, and other living as well as the inanimate features.

•To integrate the spatial data obtained from the heterogeneous sources.

To prepare a Geo database of Kathmandu University

•To prepare the interactive map where users can request different aspects of map viewing.

•To upload the interactive map on the web portal for multi user access as a means of map dissemination.

The main objectives are followed by following sub objectives:



IntroductionRationaleObjectives

Limitations

Methodology Outcomes Work schedule Conclusion and Recommendation References


Limitations Of The Study


This study has been undertaken in the view of meeting the partial fulfillment of the Engineering Project, GEOM 307. The study had to be completed within the limited time frame and resource limitations.

1.Resource limitation:

The limited budget constrained for the quality data, high precision instruments i.e. Satellite Images and good working environment

i.e. High speed internet, (For downloading the textures, Images and Google Earth Integration)

High computer processors (For simultaneous use of various software )



IntroductionRationaleObjectivesLimitations

Methodology

Outcomes Work schedule Conclusion and Recommendation References


Software used


Sketch Up-For creating 3d inanimate features like buildings, pole, playground etc.

Google Earth- Georeferenced Google images are good source for positional data of features like trees, vegetation etc.

Arc Map V.10.0 Cad to Geodatabase conversion and preparation of all 2d map layers

Arc Scene V.10.0 Preparation of 3D terrain and integration of the models prepared in Sketch Up to produce a model.

AutoCAD Civil 3D Land Desktop Companion 2009 Editing and extractions of annotation data from AutoCAD drawing of the university


Work Flow Diagram


3D MODEL OF TERRAIN

KU Land Survey July 2010

Multipurpose Cadastral Data, Banepa Office

Google Earth Image Of University Area

AutoCAD plan of buildings and other features

CAD Models To Sketchup MODELS TO SKETCH UP

Creation Of 3d Features In Skecth Up

IMPORT SKETCHUP MODELS TO ARC

SCENE

3d Models(buildings+ roads+ other Man Made Features)

3D MODEL OF FEATURES

3D Model Of KU



3D Model Of KU

Adding Interactive Options (Interactive Map)

Upload To Web


Data Integration Procedure


AutoCAD plan (CED 2010) Cad to Geodatabase conversion Differentiating individual layers of whole features

AutoCAD master plan of KU Geodatabase in Arc Map



Multipurpose Cadastral Survey-digital Cadastral Office, Banepa

Accurate positioning of building footprints and roads



Google earth images Images were georeferenced and used for creating features like trees,

vegetation



Sketch Up Modelling

A open source software provided by Google and is mainly used for 3D modeling and sharing.

Mainly used for 3d city modeling in the Google Earth

We used this software to develop our 3D models of the KU buildings.

Tools we used


Photorealistic Building Models


MULTISOURCE DATA INTEGRATION TO PREPARE INTERACTIVE 3-D MODEL OF KATHMANDU UNIVERSITY

23

Buildings constructed using Auto CAD plans

6/21/2013



Buildings made without using cad plan



Arc map

One of the 3 main component that make up ArcGIS.

An interface that allows users to view data sets together, perform analysis and create maps

All 2d mapping works were performed in Arc map Version 10

Arc map version 10 provides an easy interface for mapping functionality

Arc Scene

A software to visualize features in 3D by providing height information from feature geometry, feature attributes, layer properties, or a defined 3D surface (such as a digital elevation model, or DEM)

Arc Scene version 10.0 have got advance 3d editing tools

2D Editing 3D Editing

3D Terrain Modeling Using GIS Package: ArcGIS V10.0



2D EDITING AND MAPPING-ARC MAPCad to Geodatabase

Reads a CAD dataset and creates feature classes of the drawing. The feature classes are written to a Geodatabase feature dataset.



Final 2D map with all information



TIN representation of the terrain

TINs are a form of vector-based digital geographic data and are constructed by triangulating a set of vertices (points).

The vertices are connected with a series of edges to form a network of triangles following Delaunay triangulation



INTERACTIVE TIN EDIITNG

The resulting triangulation satisfies the Delaunay triangle criterion

which ensures that no vertex lies within the interior of any of the circumcircles of the triangles in the network.

If the Delaunay criterion is satisfied everywhere on the TIN, the minimum interior angle of all triangles is maximized.

The result is that long, thin triangles are avoided as much as possible.



3d Editing - Arc Scene

Arc Scene allows 3D editing environment and offers more edit tool options specific to multipatches

Editing in 3D is designed to work with the 3D Analyst extension in ArcScene

3D editor tools are easily available from a dock able toolbar and a pull-down 3D Editor menu

All tools provide real-time surface feedback, which permits you to save your edits directly back the document or undo your changes.



Multipatch feature

A GIS object that stores a collection of patches to represent the boundary of a 3D object as a single row in a database

Contain 3D models with vertical and overhanging faces allowing the creation of photorealistic 3D views.

Can contain texture information, such as a digital photograph of the front of a building.

Is stored in the Geodatabase or shapefiles in the same manner as point, line, and polygon data.



Fig: Multipatch representation of Kathmandu University central library.

Fig: Multipatch representation of Admin Block



Locating the building exactly where it has to be.

Models are georeferenced with the help of move tool.

Georeferencing 3D



Integration Of ArcScene and SketchUp



Using Google API V3.

Strong JavaScript Library.

Coding is relatively easy to use and understand.

Why Google API v3?

Core objects: Map, Markers, Info Windows.

Custom Overlays, Controls, Tiles.

Geocoding.

Ground Overlays.

KML/KMZ Layers.

Interactive Web Mapping



IntroductionRationaleObjectivesLimitationsMethodology

Outcomes Work schedule Conclusion and Recommendation References



The major outcomes of the project are:

Geo Database of Kathmandu University



Animated Map 3D : A video Clip

2D Animated Web Map:



IntroductionRationaleObjectivesLimitationsMethodologyOutcomes

Work schedule Conclusion and Recommendation References



S.N Weeks

Activities

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

1 Project title discussion

2. Desk study and web browsing

3 Project title decision

4 Interaction with Supervisor

5 Proposal defense

6 Data collection

7 Data integration and 3D building models preparation

8 3D model of terrain with features

9 Mid term presentation

10 Preparation of interactive web model

11 Final report preparation

12 Final presentation



IntroductionRationaleObjectivesLimitationsMethodologyOutcomes Work schedule

Conclusion and Recommendation

References



Multisource data integration is often a complex task and involves the series of coordinate transformation and file formats interpolability issues.

The users of today’s era wants map to be more interactive and user friendly.

Accurate 3D modeling of the any geographical location first seeks the quality data with completeness and correctness and also the excellent working environment .

Establishment of the web server is the effective means of disseminating

the maps among the variety of users .

Conclusion and Recommendation



IntroductionRationaleObjectivesLimitationsMethodologyOutcomes Work schedule Conclusion and Recommendation

References



http://blogs.esri.com/esri/arcgis/2012/01/05/making-a-large-scale-3d-map-part-1/http://blogs.esri.com/esri/arcgis/2012/01/05/making-a-large-scale-3d-map-part-2/http://blogs.esri.com/esri/arcgis/2012/01/05/making-a-large-scale-3d-map-part-3/

Ross, L., Kleinschmit, B., Döllner, J. and Buchholz, H., 2006. Automated Transformation of 2D Vector-Based Plans to 3D Geovirtual Environments, In Buhmann, E.; Ervin, S.; Jorgeson,I. & Strobl, J. (ed.) Trends in Knowledge-Based Landscape Modeling - Proceedings at Anhalt University of Applied Sciences., Heidelberg (Wichmann), 2006, 138-144.

Collaborative Mapping of London Using Google Maps: The LondonProfile Maurizio Gibin, Alex Singleton, Richard Milton, Pablo Mateos, and Paul Longley. All authors are associated with the Centre for Advanced Spatial Analysis (CASA) at UCL.Early Development in Vancouver: Report of the Community Asset Mapping Project (CAMP) by Clyde Hertzman, Sidney A. McLean, Dafna E. Kohen, Jim Dunn, Terry EvansAugust 2002

http://blogs.esri.com/esri/arcgis/2012/01/05/making-a-large-scale-3d-map-part-3/





Web mapping - Wikipedia, the free encyclopedia

Talk:Web mapping - Wikipedia, the free encyclopedia.

Static Maps API V2 Developer GuideThis document details the Static Maps API v2. To update your v1 URLs, please consult the Upgrade Guide.

Google Maps Image APIsGoogle Maps Javascript API V3 EventsNote: The Google Maps Javascript API Version 3 documented within these pages is now the official Javascript API. Google Maps JavaScript API V3.

Mohammadi M. and Rajabifard, A. 2010. Development of an interoperable tool to facilitate spatial data integration in the context of SDI, International Journal of Geographical Information Science, Vol 20, No 7, International Journal of GIS, 727-741.Mohammadi, H., A. Rajabifard, A. Binns, and I. P. Williamson. 2006. Development of a framework and associated tools for the integration of multisource spatial datasets. 17th UNRCC – AP (September 18 – 22). Bangkok, Thailand.

multisource data integration to prepare interactive 3d model of kathmandu university

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