Index

Introduction

Data Acquisition

Methodology

Spatial Analysis

Operational  Errors & Problems

Link

The major process in the project is to convert data, create base map and create fuzzy image for the final result.

Base map

Fuzzy images

Data conversion:

  After all the required files were downloaded, the files were unzipped the software WinZip.  Now, the files were in e00 format.  By using “Import 71” function from ArcView 3.2, the fourteen themes were now converted to a format that can be view from ArcView 3.2.  Then, the themes were converted to shape file format to prepare for further analysis.

  At this point, the dataset is covering the entire Georgia State.  In order to obtain all required data from other themes that within Fulton County, the clip theme function is needed.  This function is part of Geoprocessing extension.  The function allows clipping a theme based on another theme.  In addition, Idrisi doesn’t support Lambert Conic Conformal (original projection), all the data were needed to re-project.  These are the steps to clip and re-project themes:

§      Other than Fulton County, delete all data from County boundary’s attribute table

§      Clip all other thirteen themes base on the clipped County Boundary theme

§      Define all required themes to Lambert Conic Conformal projection in ArcToolBox.

§      Projection all themes to Lambert Conic Conformal projection in ArcToolBox.

§      Projection all themes to NAD 1983 StatePlane West Georgia State FIPS 1002 in ArcToolBox.

Now, the dataset are in vector format and ready to use in Idrisi. 

 In Idrisi, all fourteen vector files were converted into raster format in the following steps: 

• File à   Import  à  Software specific formats à  ESRI formats à  Shapeidrà  select spc83ga1.ref

• Reformat à  Raster / Vector conversion à  Pointras or POLYRAS or LINERAS (copy parameter from County_ras.rst)

Base map

Fuzzy images

Created by Alex Chan

From SFU, Geography Department