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Importing, Accessing and Handling Data Charles E. Noon, Ph.D. The University of Tennessee
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Session Overview F Types of information to assemble within a GIS F Methods for importing data F A walk-through example of importing, geo- locating, and editing data F A reinforcing exercise F Descriptive Analysis
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Types of Information to Assemble within a GIS Internal Information External Foreground Information External Background Information
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Types of Information to Assemble within a GIS 1. External Background Information: the part of the system you don’t own and can’t influence. 2. Internal Information: the part of the system you own or directly work with. 3. External Foreground Information: the part of the system you don’t own or directly work with, yet is very relevant to your organization. Operational Application Strategic Planning Application
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External Background Information F Geo-political boundaries, landmarks, common- use transportation systems. F Such data can be found on data disks that accompany GIS software packages. F Importing it is usually easy. In ArcView use View-Add Theme.
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Internal Information F Any data found within your MIS, LIS, financial system, WMS, purchasing system, ERP, or any transaction-based IS. F Ease of obtaining such data is organization- specific and depends on: –IS infrastructure –IS culture (sometimes require AOG)
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External Foreground Information F Examples: –potential customers –current and potential competitors –potential partners F Wide range in difficulty to obtain such data: –Some public via “phone books” –Some can be purchased as demographic or business databases –Some may be provided by potential partners
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Getting Data into a GIS F Principle: –there might be a lot of data associated with an entity (for example, a DC), but that entity has just one location. Make sure each entity has a data element that will allow it to be geographically located. u 5-digit zipcode u city/state u street address u latitude/longitude u other codes
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Example: Information for 2 plants Plant NamePROVOROME LocationUTAHGEORGIA Zipcode8460230164 Plant ID4962470136668 1997 units produced272,424278,111 Unit Cost$46.72$54.65 Capacity (units)345,000282,000 Value of Inventory$2,545,529.86$3,039,753.23
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Getting Data into a GIS F Principle: –there might be a lot of data associated with an entity (for example, a DC), but that entity has just one location. Make sure each entity has a data element that will allow it to be geographically located. u 5-digit zipcode u city/state u street address u latitude/longitude u other codes F Data can be pulled or pushed into a GIS
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Ways to Pull Data into a GIS F SQL (Sequential Query Language) F ODBC F R/3 interface F SDE (Spatial Database Engine) F RPC (Remote Process Call) F Informix Datablade
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Various Paths to Push Data into a GIS GPS Spread Sheet DBMS DBF file Other formats GIS Data Table
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Various Paths to Push Data into a GIS GPS Spread Sheet DBMS DBF file Other formats GIS Data Table
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Each row corresponds to an entity location
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Various Paths to Push Data into a GIS GPS Spread Sheet DBMS DBF file Other formats GIS Data Table
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With the Tables icon selected, hit Add button.
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Various Paths to Push Data into a GIS GPS Spread Sheet DBMS DBF file Other formats GIS Data Table
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The selected theme will be the reference theme.
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How to Edit Data in a Table F Manually editing of existing data. F Adding a new data field. F Adding a field whose value is a function of other data fields.
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It will add the formula into whatever field is selected.
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In-Class Exercise 1. Import the DC’s information (in the file DCs.dbf) into an ArcView project. 2. Geo-Locate the DC’s based on 5-digit zip. 3. For the data table corresponding to the new theme, add a new field which calculates total annual handling cost for each DC. 4. Add some external background information.
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