GIS 201 Chapter 1.txt

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Author:
dtarasov
ID:
98318
Filename:
GIS 201 Chapter 1.txt
Updated:
2011-08-24 23:24:40
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GIS chapter
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Description:
Simple GIS 201 flashcards.
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  1. What is a coverage?
    A vector data format developed for Arc/Info; the oldest of the data formats.
  2. What is a TIN?
    TIN stands for Triangulated Irregular Network; a file type that stores 3D sufrace information, such as elevation, using a set of nodes and triangles.
  3. What is a shapefile?
    A vector feature class developed for the early version of ArcView and carried over into ArcGIS.
  4. What is the difference between large-scale and small-scale maps?
    A large-scale map is one in which the denominator of the ratio is small. Large-scale maps show a small area with great detail, while small-scale maps show bigger areas with less detail.
  5. Are digital elevation models raster or vector?
    Raster.
  6. What is resolution?
    The sampling interval at which data are acquired.
  7. What 4 numbers are needed for georeferencing a map in an x-y coordinate system?
    The x and y location for one pixel in the raster data set and the size of the pixel in the x and y directions.
  8. What are the two basic vector models?
    Spaghetti and topographical.

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