issues of scale using color. scale issues what is map scale? the scale of a map is the relationship...
TRANSCRIPT
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Issues of Scale
Using Color
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Scale Issues
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What is map scale?
The scale of a map is the relationship between a unit of length on the map and a unit of length on the ground.
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Verbal scale“One cm represents 100 km”
Bar scales (graphical)
Representative fraction (RF) 1:24,000
Map Scales
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Representative Fraction
A 0.025 inch line on a 1:24,000 scale map represents 50 ft (600 in) on the ground
A 0.025 inch line on a 1:200,000 scale map represents almost 417 ft on the ground
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Scale Issues
Beware of scale statements
1:200 (“one to two hundred”) does this mean
unit-to-unit
(one inch on the map equals 200 inches on the ground)
or
not unit-to-unit
(one inch on the map equals 200 feet on the ground)
For this course,
all scale statements will be assumed unit-to-unit
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Scale Issues
large scale vs. small scale
To a geographer:1:2,000,000 is small scale
1:200 is large scale
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Importance of Scale
Scale of data plays an important role, and frequently causes problems
All spatial phenomena have scale dependent behavior/properties
Be aware of:
Data source scale
Mixing data from different source scales
Appropriateness of output scale
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Scale Issues
Data from different sources and scales can vary widely
1:100,000 scale data from USGS DLG
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Scale Issues
1:1,000,000 scale data from DCW (DMA)
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Scale Issues
1:2,000,000 scale data from USGS DLG
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Using Color
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Displaying data: colors
From Tufte 1990
Wabern, 1983
What can color do?
Label
Measure
Represent or imitate reality
Beautify
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Displaying data: colors
From Tufte 1990
Primary home heating fuel. U.S. Department of Commerce
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Displaying data: colors
From Tufte 1990
Primary home heating fuel. U.S. Department of Commerce
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Displaying data: colors
From Tufte 1997
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Displaying data: colors
From Tufte 1997
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Displaying data: colors
From Tufte 1997
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Color Blindness
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Color Blindness
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Color Blindness
http://jfly.iam.u-tokyo.ac.jp/color/
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Color Blindness
http://jfly.iam.u-tokyo.ac.jp/color/
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Color Blindness
http://jfly.iam.u-tokyo.ac.jp/color/
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Color Blindness
http://jfly.iam.u-tokyo.ac.jp/color/
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Color Blindness
http://jfly.iam.u-tokyo.ac.jp/color/
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Color Models
RGB
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Color Models
CMYK
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Redundant Coding
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Redundant Coding
http://jfly.iam.u-tokyo.ac.jp/color/
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Redundant Coding
http://jfly.iam.u-tokyo.ac.jp/color/
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Color Schemes
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Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
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Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 34: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/34.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 35: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/35.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 36: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/36.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 37: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/37.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 38: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/38.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 39: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/39.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 40: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/40.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 41: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/41.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 42: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/42.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 43: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/43.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 44: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/44.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 45: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/45.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 46: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/46.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 47: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/47.jpg)
Color Schemes
http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
![Page 48: Issues of Scale Using Color. Scale Issues What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of](https://reader035.vdocuments.mx/reader035/viewer/2022062515/56649f4c5503460f94c6ce73/html5/thumbnails/48.jpg)
http://www.personal.psu.edu/cab38/ColorBrewer/ColorBrewer.html
Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University
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Specifying Colors in ArcMap
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Homework
Read: “Creating Feature Datasets & Vector Editing” & “Creating and Modifying Tables”
Start working on assignment #4 -- Due April 26.