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Important GIS Vocabulary

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Vocabulary to better understand Vector and Raster GIS

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Important GIS Vocabulary

  1. 1. Important GIS Vocabulary Part 1
  2. 2. Reclassification <ul><li>using one set of values to derive a second set more directly useful to the problem at hand </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Intro” found here: http://www.purposegames.com/game/price-intro-quiz/info </li></ul>
  3. 3. Dissolve <ul><li>remove boundaries between polygons of the same designation </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Intro” found here: http://www.purposegames.com/game/price-intro-quiz/info </li></ul>
  4. 4. Query <ul><li>extracts polygons and places them in a new layer by themselves </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Intro” found here: http://www.purposegames.com/game/price-intro-quiz/info </li></ul>
  5. 5. Buffers <ul><li>polygons created within a certain distance of a feature (usually outside) </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Intro” found here: http://www.purposegames.com/game/price-intro-quiz/info </li></ul>
  6. 6. Union <ul><li>combines layers </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Intro” found here: http://www.purposegames.com/game/price-intro-quiz/info </li></ul>
  7. 7. Project-Oriented GIS <ul><li>scale and frame of the project is well defined and project life is finite </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Intro” found here: http://www.purposegames.com/game/price-intro-quiz/info </li></ul>
  8. 8. Enterprise GIS <ul><li>designed for long-term support of critical functions within an organization </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Intro” found here: http://www.purposegames.com/game/price-intro-quiz/info </li></ul>
  9. 9. Attributes <ul><li>each feature from a vector file containing information linked to a storage table with a feature identification code (FID) </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  10. 10. Feature classes <ul><li>features grouped into data sets, can only contain one type of geometry that share attributes </li></ul><ul><ul><li>data set can have only points, or only lines, or only polygons </li></ul></ul><ul><ul><li>data set can not share rivers and highways because they have different attributes </li></ul></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  11. 11. Feature datasets <ul><li>contain multiple feature classes that are in some way related to each other </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  12. 12. Features <ul><li>points, lines or polygons </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  13. 13. FID <ul><li>feature identification code links the feature with it’s attributes </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  14. 14. Georeferenced <ul><li>the information is tied to a specific location on the earth’s surface </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  15. 15. Node/nodes <ul><li>end points of a line </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  16. 16. Shapefile <ul><li>contain only one feature class, spatial data model developed for and used by ArcView3 and later versions </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  17. 17. Spaghetti model <ul><li>a model which stores spatial features as a series of xy coordinates as independent objects unrelated to each other and does not store topological relationships between features </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  18. 18. Thematic mapping <ul><li>displaying the features of a spatial data layer based on values in its attribute table </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  19. 19. Topological model <ul><li>a data model which stores spatial relationships between features in addition to their xy coordinates </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  20. 20. Two basic vector models <ul><li>topological models and spaghetti models </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  21. 21. Vector model <ul><li>a spatial data storage method in which features are represented by one or more pairs of x,y coordinate values forming points, lines or polygons </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  22. 22. Vertex/vertices <ul><li>intermediate points along the line </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Vectors” found here: http://www.purposegames.com/game/price-ch1-vectors-quiz/info </li></ul>
  23. 23. Raster model <ul><li>a spatial data storage method in which spatial data are represented by a series of small squares called cells or pixels </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Rasters” found here: http://www.purposegames.com/game/price-ch1-rasters-quiz/info </li></ul>
  24. 24. Two styles of raster storage <ul><li>continuous rasters </li></ul><ul><li>discrete rasters </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Rasters” found here: http://www.purposegames.com/game/price-ch1-rasters-quiz/info </li></ul>
  25. 25. Continuous raster <ul><li>data that take on a variety of different values and that change rapidly across a data set (elevation, for example) </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Rasters” found here: http://www.purposegames.com/game/price-ch1-rasters-quiz/info </li></ul>
  26. 26. Discrete raster <ul><li>data which take on a relatively small number of distinct values </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Rasters” found here: http://www.purposegames.com/game/price-ch1-rasters-quiz/info </li></ul>
  27. 27. Each pixel <ul><li>has a numeric code indicating the land use, and the raster is stored as an array of numbers </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Rasters” found here: http://www.purposegames.com/game/price-ch1-rasters-quiz/info </li></ul>
  28. 28. Raster data set <ul><li>is laid out as a series of rows and columns which provide the address for a pixel </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Rasters” found here: http://www.purposegames.com/game/price-ch1-rasters-quiz/info </li></ul>
  29. 29. Resolution <ul><li>ground area represented by one cell value in a raster </li></ul><ul><li>Practice these vocabulary with Purpose Games “Price Ch1 Rasters” found here: http://www.purposegames.com/game/price-ch1-rasters-quiz/info </li></ul>
  30. 30. SOURCE <ul><li>All this vocabulary comes from: </li></ul><ul><li>Price, Maribeth. Mastering ArcGIS. McGraw-Hill; 3 edition. 2007. </li></ul>

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