Emily Snow2/20/08Lab 3 (19.25/20)Part I1. Print screen of map from extra challenge on p. 469.2. What is the dimensionality of each of the data layer? (-0.5)Census: PolygonLandmarks: PolygonShorelines: PolygonWaterbodies: Polygonshoreline: line waterbodies: polygon landmarks: pointdemographic data: polygon3. Print screen of resulting bx_demog layer resulting at end of task 4, p. 480. Justify the number of classes that you use and the breaks in the data.Equal Interval with 25 breaks – It seems more reasonable to use more breaks when you use equal intervals because you get a clearer sense of the percent minority for each particular census block group.4. What measurement levels of data are mapped?Percent minority data was ratio data. Total population, minority population, and South American population were examples of nominal data.5. What are the two types of thematic maps covered in these exercises? What questions are they best to describe? (-0.25)The two types of thematic maps covered in these exercises are dot density maps and cloropleth maps. Dot density maps are best for representing counts, whereas the cloropleth maps are best for representing ratios.Choropleth maps are best to describe rates, percentages or ratios. Dot density maps are used to describe variation in spatial density.Part IIPrint Screen is on next page. Document saved as
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