Examination and Study Questions for Data Sources

  1. Essay Questions
  2. Short Answer
  3. Multiple-choice

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1. Essay Questions

Limit each essay to two double-spaced typewritten pages plus references.

  1. The availability of TIGER files has made possible low-cost municipal LIS. Would you agree or disagree with this statement and for what reasons?

  2. Most GIS are static systems. To what extent is this the result of the data sources that are available for database creation?

  3. Despite their errors, why are the 1990 TIGER files a major advance for GIS?

  4. In assembling a municipal multi-purpose cadastre, how will the wide variety of data sources employed affect the accuracy of the combined database?

  5. What factors limit the market for standardized digital data sets such as those sold by the USGS and Ordnance Survey?

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2. Short Answer

Limit your answers to no more than 100 words.

  1. What are the drawbacks of the climatic data collected by World Data Centers and at other sites around the world?

  2. What is the primary user criticism of the DLG format?

  3. What is the purpose of the Spatial Data Transfer Standard (SDTS) and how might it affect the development of GIS in the U.S.?

  4. Why are 1990 TIGER files an important advance for digital mapping?

  5. What is the smallest unit of aggregation used to report data from the 1990 US Census?

  6. Distinguish among DLG, DEM, and DOQ formats developed by the US Geological Survey?

  7. What are three important considerations in checking the pedigree of quality of digital data sources?

  8. What is the main problem associated with locating data sources for GIS at state and local levels?

  9. Why were TIGER files developed?

  10. Why was the Spatial Data Transfer Standard developed? What are its major limitations?

  11. No matter how inexpensive and wide-spread GPS technology becomes, why will it not entirely solve the problem of creating precise and accurate GIS datasets?

  12. Define and explain the term "metadata."

  13. What is the significance of the phrase" truth in labeling" as applied to GIS datasets?

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3. Multiple-choice questions

Choose the best or most appropriate answer(s) to the question.

  1. Which of the following statements are true of the US Census Bureau TIGER files?

    1. TIGER files employ arc-node topology.
    2. TIGER files contain all the data collected in the 1990 census.
    3. TIGER files are available for every county in the US.
    4. TIGER files are the same as DIME files.
    5. TIGER files are rarely used outside of the Census Bureau because of their inaccuracies.
    6. TIGER files include address ranges for all streets.

  2. What of the following statements are true of USGS products?

    1. DLGs are now produced only at the 1:24000 scale.
    2. DEMs will replace DLGs once all quadrangles are digitized.
    3. DLGs divide the information contained on a conventional paper USGS quadrangle map in many separate digital files by theme.
    4. DLG coverage of the US is now complete at the 1:2,000,000 scale.

  3. What lessons were learned from the CORINE project?

    1. GIS is still unsuited to regional environmental monitoring.
    2. The quality of data sources is of prime importance in assembling international GIS datasets.
    3. Map coverage varies radically by country, even in the developed world.
    4. High quality environmental data is available for developed countries, but is time consuming to convert to digital format.

  4. Which of the following are not characteristics of data quality?

    1. completeness
    2. attribute accuracy
    3. coordinate jurisdiction
    4. positional accuracy
    5. timeliness
    6. logical consistency
    7. the size-shape ratio of irregular polygons

  5. TIGER files were developed by the US government to:

    1. produce digital maps of threatened habitat
    2. determine voting trends for Congress
    3. to manipulate 19th century census data
    4. to support the tabulation of data by the Census Bureau
    5. none of the above

  6. GIS data sources in the United States:

    1. are restricted to the federal government
    2. are produced and distributed by government, commercial, and private vendors
    3. must be obtained through the Freedom of Information Act
    4. must meet the standards of the Spatial Data Transfer Standard
    5. none of the above

  7. Many commercial vendors repackage, correct, and reformat government information and data. Which of the following are true?

    1. the government collects royalties from the sale of repackaged data
    2. charges for such data are regulated by the government
    3. cartographic data may not be repackaged by vendors
    4. commercial vendors may repackage and sell data at whatever price the market will bear
    5. the US government copyrights statistical information

  8. Before attempting a large data conversion project you should do which of the following:

    1. test your procedure and the data
    2. rely only on government approved data
    3. consider the cost of conversion
    4. all of the above
    5. 1 and 2
    6. none of the above if you have a data quality report

  9. Digital line graphs (DLG) are available from the US government. Which of the following are not true?

    1. DLGs are available on CD-ROMs
    2. complete national coverages is available
    3. DLGs are available on magnetic tape
    4. DLGs are composed of lines, nodes, and areas

  10. Which of the following must be transmitted in binary format on the Internet?

    1. electronic mail
    2. .gif files
    3. html files
    4. .txt files
    5. none of the above



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Created on 5 Jan 96. Revised on 5 February 2000. LNC