This exercise is about choosing colors. The first part is about using a tool for choosing colors for a thematic map. Then we will write a review of a couple of maps and in the end of this exercise there is a QUIZ.
Colorbrewer http://colorbrewer2.org is a website based on work of perception and types of colors.
The person behind the website (Cynthia Brewer) is also the author of the book
Designing better maps:a guide for GIS users.
'1. Start with just exploring Colorbrewer.'
'2. The data…'
Go to Statistics Sweden and download the zip file
Län, kommuner och kommuner med utbrutna storstadsområden i ArcView shape format (Zip fil)
Extract the files in on your computer.
'3. Make a thematic map (choropleth map), choose the number of classes (colors).'
To make a choropleth map of the population density in Swedish municipalities, add the layer with the Swedish Municipalities (
:File > Add Data
Right click on the layer in
Table Of Contents and choose
Properties…. Go to:
Symbology > Quantities > Graduated colors
Value: BEF2004(the population)
Normalization: LANDAREAKM(the area in km2)
and the number of classes (colors) you want to use for presenting the population density.
'4. Choose colors using Colorbrewer. Write down the RGB (Red, Green, Blue) codes for your choice.'
'5. Change the colors of your thematic map into the colors you have chosen using the tool.
Click on a color box in
Table Of Contents. Then click on the color box after
Fill Color and
RGB if needed and change the color using the RGB code. Click at
OK twice and the color of the map should change.
'6. Export your map as a jpeg when you are satisfied with the result.'
To add a legend, go to
:View > Layout View
Insert > Legend…
Export the result using:
File > Export Map…
Choose two of the four webpages listed below. Make a review of them and their maps functions and use of colours. Make explicit references to the literature ((Brewer) ((write a half to one page).
Add your thematic map to the review and send it to the e mail address presented by the teacher.
Test what you know about choosing colors for maps with the QUIZ. Redo the exercise until you get everything right. Remember that this questions and answers are not absolute rules. Should be seen as guidelines.