11 Feb ENMT307 Introduction to Geographi
ENMT307 Introduction to Geographic Information Systems
Module 3 Discussion
GIS Data Formats and Data Quality
After reading the Week 3 GIS Articles under Module 3, please complete the required task and respond to one or more of the following questions. After making your initial response (primary post), come back in a day or so to respond to the postings of your classmates (secondary post).
PARTICIPATION QUESTIONS (choose one):
1) Explain, as if you were explaining to a small child, the difference between raster and vector data formats and the pros and cons of each.
2) Give an everyday example of something that is either high precision but low accuracy, or high accuracy but low precision. Give a second everyday example of something that is non-observable data or secondary data – explain!
3) Satellite images are raster data. There are many types of multispectral satellite images acquired from satellite remote sensing. Include (attach or paste) a picture of a satellite image. Explain which satellite/sensor this image came from, characteristics of the sensor, the location of the picture, the resolution of the image, the image date and time of day, and any other relevant characteristics. (http://earthobservatory.nasa.gov/ might be a good place to start, or http://www.satimagingcorp.com/ , or try a Google search like “Landsat”…) ***Do not just post a picture, I want the image details too!***
4) You will be conducting joins, relates (p. 175), and queries (p. 28) in your workbook this week. Explain the difference between these and give examples.
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