Introduction:
The goal of this lab was to learn how to download data from
the U.S. Census Bureau and bring that data into Arcmap. A graduated color map was then created of one
variable from that data. That map was
then used to build an interactive web map in ArcGIS Online.
Methods:
Task 1: Selecting and
downloading the 2010 U.S. Census data
Starting in the advanced search
by navigating to “population total” was the first step, then it was added to
the selection, then the geography category chosen for Wisconsin was “all
counties in Wisconsin”. From here, “total
population” from the 2010 SF1 Dataset was chosen. This dataset was downloaded as a zipfile to
the Lab folder. The csv files were then
extracted and saved as MS Excel files before being brought into Arcmap.
Task 2: Downloading
the shapefile for the Wisconsin Census data
The
data already downloaded doesn’t contain any geographic data, the shapefile for
the Wisconsin Census data must be downloaded.
The data was then downloaded as a zipfile, and extracted in the Lab
folder.
Task 3: Joining the
data
Using ArcCatalog,
the shapefile was added to a blank map, along with the P1 table from
excel. The P1 table was then joined to
the shapefile using the GEO_ID field because it was an attribute that was the
same in each table. In order to perform
more standard operations with the data that was added to ArcMap straight from
an MS Excel file, a new population field was added, using the field calculator
to add the same data contained in the old population field.
Task 4: Mapping the
data
Next a
graduated color map was created using the new population field as the
value. This map shows a color value for population
in each county of Wisconsin.
Task 5: Mapping a
variable of choice
The
same workflow and steps from Tasks 1-4 were used to create a map of any
variable of choice. In this case, sex by
age in Wisconsin counties was a logical choice, specifically females - age
22.
Task 6: Building a
layout
Next
was to create a cartographically pleasing map for each feature dataset: Wisconsin
population by county, and the percent of 22-year-old females of the total
population in each Wisconsin county. All
appropriate map elements and pertinent map information was included, things
like: title, legend, source, etc.
Task 7: Create an
interactive web map in ArcGIS Online
The
first step in this task was to log in to ArcGIS Online using a personal UWEC
Geography & Anthropology Organization account. Next was to create a feature service from the
ArcMap document. Only one of the two
maps would be used in the web map, so Wisconsin Population by County was
chosen. This service was then shared
with UW-Eau Claire Geography and Anthropology and published. Next, using Google Chrome as an internet
browser, a web map was created from the demographic information service published
to ArcGIS Online. Under My Content on
the main ArcGIS Online tab, the published feature layer was added to the
map. Next, using Configure Pop-Up, the
two attributes that were chosen to show on this map were County (Name) and
Population. The interactive web map was
then finished. This could be tested by
clicking on a county and seeing that the name and population popped up. The map was then saved with the appropriate
title, tags, and summary, and shared with UW-Eau Claire Geography and
Anthropology.
Results:
Figure 2.1
Figure
2.1 shows the two maps created in Arcmap.
On the left is the first map created, showing population by county in
Wisconsin. It displays counties that are
more populated with the darker shades. On
the right is the map created from the variable of choice. It shows what percentage of the population 22-year-old
females make up in each county. One
factor that may influence these statistics is colleges being located in the
counties with higher percentages of 22-year olds.
Figure 2.2
Figure
2.2 shows the interactive web map created with ArcGIS Online. This is functional and user friendly because
it shows the population and name of each county you click on. It also allows you to zoom in and out and pan
in any direction.
Source:
U.S. Census Bureau
website:
Data Access and Dissemination Systems (DADS). (n.d.). American FactFinder. Retrieved December, 2016 from http://factfinder.census.gov/faces/nav/jsf/pages/index.xhtml?refresh=
ArcGIS Online:
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