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How to empower community by using GIS lecture 2


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How to empower community by using GIS lecture 2

  1. 1. 地理資訊系統於高中職社區化之應用 How to empower community by using GIS Lecturer: Yao-hui Wang
  2. 2. Lecture 2 Content And Operation of ArcGIS <ul><li>Lecture Outline </li></ul><ul><li>1.What is ArcGIS ? </li></ul><ul><li>2.Content of ArcCatalog </li></ul><ul><li>3.Geographic Data Models in ArcGIS </li></ul><ul><li>4.Content of ArcToolbox </li></ul><ul><li>5. Practical Section </li></ul>
  3. 3. What is Arc GIS <ul><li>ArcGIS ≠ ArcMap </li></ul><ul><li>ArcGIS ≠ ArcGIS Desktop </li></ul>Actually ArcGIS is……..
  4. 4. Source: ESRI, what is ArcGIS TM ? (2001)
  5. 5. Source: Ibid That’s what our group always execute previously.
  6. 6. What ArcGIS Desktop Contain <ul><li>ArcCatalog </li></ul><ul><li>ArcToolbox </li></ul><ul><li>ArcMap </li></ul><ul><li>And sometime you may use….. </li></ul><ul><li>ArcScene </li></ul><ul><li>ArcObject Developer Help </li></ul>Frequently used
  7. 7. Definitely…Conducting a Project Is Always The Best Way to Learn GIS <ul><li>Use ArcCatalog to find, preview, document, and organize geographic data and create sophisticated geodatabases to store that data </li></ul><ul><li>Use ArcMap to view, edit, and analyze your geographic data </li></ul><ul><li>Use ArcToolbox to deal with Geoprocessing </li></ul>In a Project, We will:
  8. 8. The Steps in a GIS Project <ul><li>Step 1: Identify Your Objectives </li></ul><ul><li>Step 2: Create a Project Database </li></ul><ul><li>Step 3: Analyze the Data </li></ul><ul><li>Step 4: Present the Results </li></ul><ul><li>And What’s Next ? </li></ul>
  9. 9. Step 1: Identify the Project Objectives <ul><li>Preface: the city council want to use a GIS model to site a wastewater treatment plant. And you are the selected GIS expert to conduct with this project. </li></ul>The city council has provided you with a list of the criteria for a suitable site. The parcels chosen for the site must be:
  10. 10. <ul><li>Below 365 meters in elevation, to minimize pumping costs </li></ul><ul><li>Outside of the floodplain, to avoid spillage during storms </li></ul><ul><li>Within 1,000 meters of the river, to minimize pipeline construction for treated water that is discharged </li></ul><ul><li>At least 150 meters from residential property and parks, to minimize the impact on the city.s residents </li></ul><ul><li>On vacant land that can be developed, to minimize land acquisition and construction costs </li></ul>
  11. 11. <ul><li>In addition, to further reduce construction costs, the city would prefer that the site be: </li></ul><ul><li>Within 1,000 meters of the main wastewater junction (within 500 meters is considered even more suitable) </li></ul><ul><li>Within 50 meters of an existing road </li></ul><ul><li>The plant will also require a total of at least 150,000 square meters in area. </li></ul>
  12. 12. Step 2: Create the Project Database <ul><li>You need to </li></ul><ul><li>Assemble the existing data and review it----Check the criteria and present them by layers </li></ul><ul><li>2. Prepare the data for analysis---- </li></ul><ul><li>Checking data quality (making sure the data is accurate and up-to-date) </li></ul><ul><li>Converting data between formats </li></ul>
  13. 13. <ul><li>Automating data by digitizing, scanning, converting, or geolocating </li></ul><ul><li>Defining coordinate systems </li></ul><ul><li>Projecting layers to a new coordinate system </li></ul><ul><li>Merging adjacent layers </li></ul>
  14. 14. Step 3: Analyze the Data Or Source: ESRI, Getting stared with ArcGIS, 1999
  15. 15. Convert to Raster data Environmental Criteria 1 Environmental Criteria 2 Environmental Criteria 3 Figure 3 Figure 2 Figure 1 Multiply Figure 4 Economic Criteria 1 Economic Criteria 2 Economic Criteria 3 Classify Figure 6 Figure 7 Figure 8 Standardise MCE Routine User Weight Output Figure 12 Clip Figure 13 Classify Operate Select Clip Convert to Vector Figure 15 Figure 16 Figure 17 Mask Mask Figure 18 Filter Figure 21 Decision Making Detail Assessment Figure 22 VIA Figure 14
  16. 16. Step 4: Present the Results <ul><li>Now suppose you are going to present your project at a public meeting you need to consider: </li></ul><ul><li>1.Who is your Audience ? </li></ul><ul><li>2.What do the equipments you get ? </li></ul><ul><li>3.How long would it take ? </li></ul><ul><li>4.What kind of problems would they ask ? </li></ul>
  17. 17. Using ArcCatalog Source: Michael Zeiler, Modeling our World (1999)
  18. 18. Source:Ibid
  19. 19. Source:Ibid
  20. 20. Source:Ibid
  21. 21. Assembling the database <ul><li>1. Navigate to the ArcGISArcTutorGetting_Started folder. Double-click the Getting_Started folder to show its contents. </li></ul>
  22. 22. <ul><li>2. Copy the folder and save it as a folder in C:drive or D: drive </li></ul>
  23. 23. 3. Create a personal geodatabase
  24. 24. 4. Create the City_layers and Analysis folders
  25. 25. a. Copy the parks feature class from the GreenvalleyDB geodatabase to the your project geodatabase. 5.Adding data to your project folder Here are the steps:
  26. 26. <ul><li>b. Create the streets layer in the City_layers folder. </li></ul>
  27. 27. <ul><li>Then in the Save Layer As dialog box, navigate to the City_layers folder in your project folder and name the layer .streets.. Click Save. </li></ul>
  28. 28. <ul><li>c. Create the flood_zone layer in the City_layers folder. </li></ul>
  29. 29. At this point, you have created your own project database as the graph.
  30. 30. Using ArcToolbox Firstly, the tools can be categorized into 4 groups
  31. 31. Analysis Tool
  32. 32. Conversion Tools
  33. 33. Data Management Tools
  34. 34. My tools
  35. 35. <ul><li>Due to the limited time and non-necessary to present all the tools, here we just use data management tools as our practical example. </li></ul>1. Double click project wizard (shapefiles, geodatabase) as right side.
  36. 36. 2. Choose the shapefile or geodatabase which is you supposed to set up or change the projection.
  37. 37. 3. If the shapefile or geodatabase you choose was set up the projection system before, the warning window would appear. Just click OK or 確定 . Then the wizard will go on
  38. 38. 4. Click the ‘‘next step’’ and the ‘‘Select Coordinate System’’ would appear.
  39. 39. 5. Spatial Reference window would appear and here you can choose to ‘’Select’’ the coordinate systems which are predefined in ArcGIS, ‘’Import’’ a coordinae system from an existing geodataset or create a new coordinate system from the data which is collected by your GPS or field work survey.
  40. 40. Using ArcMap <ul><li>Here is today’s assignment. </li></ul><ul><li>1. Add all the layers into a mxd file. </li></ul><ul><li>2. Try to convert all the layers into the same data structure. (e.g all become raster or all become raster), then compare the result with the original dataset. </li></ul>Most of the members of our society have the idea about how to manipulate ArcMap. However when you are dealing with the analysis or representation, you will get the chance to use ArcToolbox and ArcCatalog. So…..