About Softwares used in the Project: Following softwares were used: 1.QGIS 2.0.1-Dufour 2.Google Earth Pro 7 3.Google Sketchup 2013 4.MatLab 2009 QGIS: QGIS (previously known as "Quantum GIS") is a cross-platformfree andopen source desktopgeographic information systems (GIS) application that provides data viewing, editing, and analysis capabilities. QGIS allows to create maps with many layers using different map projections.QGIS allows maps to be composed of raster orVector layers. Typical for this kind of software the vector data is stored as point, line, or polygon-feature. Different kinds of raster images are supported and the software can performgeoreferencing of images. Use of QGIS in the project QGIS`s Attribute Editing capabilities were extensively used for the project. Mathematical and Boolean operations were performed on the dataset to calculate results. Geoprocessing tools were used to display seismically vulnerable regions on the map. Google Earth Pro Google Earth is a virtual globe, map and a GIS program that offers users access to world-wide imagery, and a large number of location-based layers. It is also a browser and authoring tool for geo-enabled web content. It is also a very useful tool for visualizing data from GPS units. The Pro version of Google Earth adds the capability of downloading aerial photographs at much higher resolution than the free consumer version of Google Earth. High-resolution aerial photography from Google Earth Pro may be used to form a highly precise base layer for a GIS data set. Images may be imported and georeferenced by importing the image as an "image overlay Tabular data in text format may be ex ported and geocoded by address or latitude/longitude using Google Earth Pro All images and tabular files can be converted into KML format using Google Earth Pro Use of Google Earth in the Project: Collection of geo referenced datasets in the seismic vu lnerable region to get Co-ordinates & Plan of all the buildings was done using google earth pro. Google Sketchup 2013 Google SketchUp is 3-D modelling program, and also works with Google Earth products. It is available in two versions - Google SketchUp (Free) and Google SketchUp Pro
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QGIS (previously known as "Quantum GIS") is a cross-platform free and open source desktop geographic
information systems (GIS) application that provides data viewing, editing, and analysis capabilities. QGIS
allows to create maps with many layers using different map projections. QGIS allows maps to be
composed of raster or Vector layers.
Typical for this kind of software the vector data is stored as point, line, or polygon-feature. Different
kinds of raster images are supported and the software can perform georeferencing of images.
Use of QGIS in the project
QGIS`s Attribute Editing capabilities were extensively used for the project. Mathematical and
Boolean operations were performed on the dataset to calculate results. Geoprocessing tools were used
to display seismically vulnerable regions on the map.
Google Earth Pro
Google Earth is a virtual globe, map and a GIS program that offers users access to world-wide imagery,
and a large number of location-based layers. It is also a browser and authoring tool for geo-enabled web
content. It is also a very useful tool for visualizing data from GPS units. The Pro version of Google Earthadds the capability of downloading aerial photographs at much higher resolution than the free
consumer version of Google Earth. High-resolution aerial photography from Google Earth Pro may be
used to form a highly precise base layer for a GIS data set.
Images may be imported and georeferenced by importing the image as an "image overlay
Tabular data in text format may be exported and geocoded by address or latitude/longitude
using Google Earth Pro
All images and tabular files can be converted into KML format using Google Earth Pro
Use of Google Earth in the Project:
Collection of geo referenced datasets in the seismic vulnerable region to get Co-ordinates &
Plan of all the buildings was done using google earth pro.
Google Sketchup 2013
Google SketchUp is 3-D modelling program, and also works with Google Earth products. It is available in
two versions - Google SketchUp (Free) and Google SketchUp Pro
Google SketchUp : Google SketchUp has capabilities to build models of anything one can imagine -
furniture, buildings, cities. Google SketchUp Pro : It is 3D modeling software for professionals. 3D models can be created, either by
starting from scratch or by using existing data by importing drawings, CAD plans, photos, aerial imagery
and other information. The modeling tools in SketchUp Pro is used to develop ideas into 3D. It alsoincludes LayOut, which is the 2D companion to SketchUp Pro for creating deliverables like permit and
construction drawings, presentation documents and full-screen digital presentations. Use of Google Sketchup in the Project:
Using base layer of google earth image, volumetric shadow analysis was done to obtain height
of the buildings.
MatLab:
MATLAB (matrix laboratory) is a numerical computing environment and fourth-generation programminglanguage. Developed by MathWorks, MATLAB allows matrix manipulations, plotting of functions and
data.
Use of MatLab in the project
MatLab `s calculation capabilities were extensively used for the project. Mathematical modeling
was used for the generation of response spectrum code from Bhuj Earthquake data.
Volumetric Shadow Analysis
Volumetric Shadow Analysis was used for generation of 3D building models from Google Earth database.
The method was used to extract building heightsand building footprints from a single image using
direction of sun and camera angle.
Steps Followed:
1. From direction of light and camera, construct the shadow and the wireframe of the
building for an assumed building height in the 3D space
2. Project the model back to image space.
3. Reconstruct the shadow and the wireframe of the building by building height
4. Increase/Decrease building height from initial value at regular interval.
5. As the building height is changed, shadow is reconstructed by changed height and re-
projected onto the image.
6. Until the shadow projected matches against actual shadow of the image building height